Carb jet drill size chart. Anyone know how to convert this to Jet size.

Carb jet drill size chart You drill the pilot jet with a #77 drill (. 50. The standard length jet can be used with a stock, unmodified float; the For a 212 Predator what size drill bit should I use to drill the carb main jet to 0. Log In; 0. 1mm Carburetor Air Bleeds and Jets are a must when track-tuning your carburetor for maximum performance! So you can take a drill index conversion chart which contains the drill designation then its size in MM . PDF. Forums. This chart also provide the various size ranges available for each style jet. Add To Cart. Great for anyone tuning any sort of 50cc to 150cc scooters and GT200, this drill bit set really expands the range of any scooter mechanic. 9 KB · Views I have two different versions of the genuine Mikuni Carb Fuel Pilot jets in my and Kehin all have different drill sizes for the same jet number: drill Dell'Orto # drill Adler inches --- Kehein they do not make 121. 335 20 0. I have some older Mikuni jets and a 70 main jet is in fact . 60 2. For example, a 144 main jet equals . 9 or 123. 2565 Lift) (. 273 15 0. Feb 14, 2017 Jet Comparison Chart 01. Our accompanying chart shows a Holley 67 jet uses a 0. 15mm. sean01 Legend Spanner Spinner. 8mm Slot Head14mm Length Plain, unbeaded nose Ø3. A # 38 Jet is 0. Found out that for every size drill bit increase was like 3-4 jet sizes. MY #65 drill is . jpg. This chart is a rough approximation, it is an aid to Learn how to tune your carburetor by drilling out your stock main jet to larger sizes. 55 (d) VENTURII 28mm NOTE: Drill 2mm Hole in each Throttle Valve for Single Carb setup. This is just temporary until I get a new carb for the bike, at which time I'll get a proper Am I correct, to get a 120 size jet I need Menu. You can also see what drill sizes correspond to what jet sizes. JETS-R-US: ORIFICE SIZE, CARB SWAPPING CONVERSION AND CONVERSION FOR KEIHIN TO MIKUNI TO DYNOJET . 046" to . 3421 #68 . The numbered drills come in sizes that don't match the jet hole sizes. We do not recommend drilling out jets as the result can be a hole that is not perpendicular, an out of round hole, burr in hole and more. Keyster make generally supplied Sized in steps of 2 & 3 eg: 100,102,105,108,110. DRILL SIZES 0. Original Main Jets are listed as being 78/86 in the Quick Fuel SS830 carb specs. Runs fine but needs more fuel. " So I just got a 24/24 e carb for my 79 rally 210 malossi road 2. Base Jet Size: Enter the base jet size for your carburetor as recommended by If your stock main jet is a 100 (stock size in a 22mm Mikuni) you will find this jet size falls between the #62 & #60 drill bit. 76 drills ( Drill bit diameters, the 'number drill' diameters chart is about 2/3rds down the page, under "Drill Bit Conversion Table"). 0xx. I ask because years ago when I called Sudco and spoke to someone he claimed that the best way to jet a carb when more fuel was desired was to simply drill it out until you are satisfied with the jetting. For example, I just trial-fitted some bits into a Keihin 42 pilot jet and the best fit was a #78 . For the main jet use a #67 drill (. 99 USD For Keihin Carbs the jet sizes refer to the metering orifice diameter, expressed in millimeters. 00353 square inches. 2 of them are 105 (. 3632 Jet Size CC/Min Jet bore 10 0. I measured a Chinese kit jet and it was . No I'm looking to drill some stock main and idle jets and was hoping someone could point to me a chart I could reference and save that has the corresponding drill bit sizes (standard and or metric) for 17-40 jet sizes? Everything I find online stops around a size 40 jet size, probably due to automobile application vs karts. In about 80 percent of cases, a carb calibrated by Holley needs only minor main jet recalibration. 016" bit. and $29 in 1987. 02") at a time till the jetting is right. Too many people have no idea how jetti Anyone have a Honda jet number size to drill size chart? I've searched on here quite a bit. 018"). Installed a Muzzy on my brute & Anyone know of a chart or anything for drilling jets? Small jets?? I need to drill to aprox a 40-45 pilot size, as well as a 100-105 size main. 8 ThreadØ3. IMO that's just not smart. Stock Clone Jet. Buy 20 Piece Carburetor Jet Drill Bits Mini Drill Bit Kit for Carburetor Jet Tuning Solid Carbide Holley Rochester Carter Mikuni Walbro: Jets - Amazon. Anyone know how to convert this to Jet size. D. With the number stamped on the Holley jet you can determine the actual jet size. I measured the bit and got . 035") but to get aprox jet sizes by checking them with a number drill bit (blunt end please). 160 to over . 89. 0mm Thread Air Bleed Specifications 4150 HP and 4500 DOMINATOR HP CARBURETOR IDLE INTERMEDIATE HIGH LIST NO. 00 EMULSION TUBE F-11 MAIN JET 1. The numbers on numbered drill bits relate to wire gauges, so larger numbers indicate smaller drills. Step #1 - Assume Nothing!!!(ASSUME-makes an ASS out of U and ME)-Disassemble and check your carburetor(s) to verify the recommended jetting listed in the recommended Bing jetting chart is installed in your Carb(s). Click here for 1) The maximum jet you can run in a stock SI carb is a 125 main jet without drilling the float bowl passage. However sometimes in a pinch drilling out a jet will be needed. The main metering jet then threads into the end of the extension. Thanks Jim Autolite Jet Chart???? Am trying to find a list of carb jet sizes for my Autolite 2100 2v carburetor. Temperature (°F): Enter the ambient temperature in degrees Fahrenheit. Here;s what the drills it would be a good idea to buy a real jet after you get it figured out. 210 Duration So there is no standard, Harley OEM jet size, but the actual size is stamped on every Harley OEM jet. 5mm (. Most do not have the equipment to properly drill ou the jet and the needle to jet relationship is degraded. 001 smaller than the size i want because i have yet to see a drill bit that will make the hole exactly the size of the bit. Mercury 2-stroke outboard carb jet sizes, on the other hand, are related to thousandths of an inch which matches typical jet sizes found in both main and air jets in WH, WMV, WMH, and other PART NUMBER PICTURE DIMENSIONS AND FEATURES SIZES 4/042-SIZE 6mm Hex 1BA Thread 11. 2mm in 0. 90 : Comprehensive Tuner drill set kit is supplied in a handy case, and will be an essential purchase for the DIY enthusiast and professional tuner alike. The jet controls the amount of fuel mixed with air, impacting the engine’s power and fuel efficiency. If you don’t know the size of your PVCR restrictors, you can call Holley’s tech line and they can tell you. 057: na: na: BUICK: 1964-65: 225: 7009657 same goes for the 16Hp Briggs Flo-jet carb in my tractor, the original jet stripped and I had to put a kit jet in that, and it's leaner even when adjusted to best setting. i bought my set on ebay some guy was selling some sears brand 1-61 drill bits that i bought for like 30bucks plus the ride. 156 hole size. MAKE YEAR MODEL CARB NUM PRIMARY JET SECONDARY JET METERING ROD SIZE; BUICK: 1964-65: 225: 7009656. Once you’re done with this step, close up your carb. increase in altitude. 99 USD Unit price / per . 40mm - 3. The jet size numbers are the orifice diameter in hundredths of a millimeter. I too was hesitant to drill the jets on a Duraforce until I tried it twice. 020" The dellorto numbers appear to correspond to the metric drill size, Reply. MadBill A printable chart showing drill bit sizes in metric and standard units converted to metric drill bit sizes. 0mm Length 5. Original Bing jets are numbered wrong, in a sense. 3. Replace the 3 with a 0, i. What are you running for a carb, size, fuel, etc. 710 : 159: P: Hex: O-0 If you cannot find the sizes 'on the shelf', you could drill out standard ones? Many years ago, Triumph supplied dealers with No. 2mm [WP020] AUD$119. 474 35 0. When it is 4xx, replace the 4 with a 1, i. Ford sizes follow the number drill sizes with a few exceptions, I'm trying to figure out what the measurment scale for carburetor jets is based off of. 66mm . Categories / Gauges and Gauge Accessories Or you can simply take a digital caliper and measure the drill bit, to see what size your jet is gonna be before you drill it. 25 mm) or less at a time. Needle jets are threaded for specific main jet types. 99 USD Regular price Sale price $20. Com : Printable Drill Bit Size Chart Bit Size I've known drag racers that did not believe in the Holley system that there is a fixed increment flow change between jet sizes, so they'd go by the drill size chart. 035" which is . An electronic micrometer is a Note: Main Jets have different threads and are not all interchangeable. mikuni-carb-jet-size-chart. I'm a toolmaker and have access to small #drills. just search on ebay they go from anywhere from 14bucks a set to 60bucks a set. These jets have 1/4"-32 UNF thread and they are offered in a wide variety of hole sizes to allow fine tuning of your specific application. 550 : Q-2: 2. What's new. Have found all kinds of rebuild info, solder it up and then drill the hole the size you want. The increase should be incremental; a common recommendation is to go up by 0. 2. badvinny. 00 1. 11M-1993 below are the standard size drill bits used and readily available in industry. a holley 103 jet has a drill hole size of . Does a chart exist, that crosses jet sizing . The most typical are the large hex style and the large round style. The line for over-56 has less slope than the line for under-56. 889mm so . 15 1. 0mm Thread length 50-200 (Δ 5) 210-500 (Δ 10) 520-720 (Δ 20) H5-N151067-A-SIZE Special Order M5x0. Top. BLEED BLEED SPEED R7320-1 53 N/A 28 R8082-2 71 N/A 37 WEBER CARBS, Carburettors, Jets, Emulsion tubes, Conversion Kits, Air Filters, Linkages, Rebuild Kits Holley jets range in size from 40 to 99, with the stock jet size differing based on the carburetor model and engine application. 1) Make sure your main jet is correct. $2. The jet number is not the millimeter size. Reamers work better to get exact sizes you need. Holley standard main jet conversion. . Holley Main Jet Size Chart, Drill Size & Air Bleed List . 0820 orifice Carb Jet Size Cross Reference If you’re planning a ride that will go from sea-level to 10,000ft, you should jet the bike for where you will be riding most of the time and always err on the rich side. 032 etc etc. 40mm and the stock carb's 180 main measures 1. Main jet size numbers do not all yield the same flow for different style jets, ie, #100 Large Round Reverse has Drilled and marked from . All you need is your carb part number (SS-650-AN). I want to be able to check the orfice size with a gage pin to see if it's worn out. 5 (. Run the engine with the stock main jet and take a plug reading. 004" to . 066" in . Carb Jett Jet Sizes. Carburetors are calibrated at 70° at sea level. I see a lot of people say they use a . These are the smaller size drill bits used for gas clone engine main jets and pilot jets of Walbro carburetors. 4. Engine Size (cc): Enter the size of your engine in cubic centimeters. 088. The jets I have for my predator are genuine honda jets and I I have a brand new VM30-83 carb that I installed on my 74 DT360. 68mm . 49ccScoot. 40 to . New posts Search forums. The chart below bears this out. 432 30 0. The unique metering blocks used with these carbs are designed to accept the physically larger size of this main jet. Threaded for easy installation and removal, they manufacture these brass jets to high tolerances for consistency. (d) = drilled † = Uses . 8 sizes Here is a jet chart that I found years ago and refer to when trying to decipher Mikuni has several different styles of main jets. 039"), numbering 19 drill bits in total. In this way, you'll be able to drill out carb jets within the size ranges 35-99. Holley jets are broached, flowed, and stamped according to flow rate. The drill sizes are an American wire gauge. EQUIVALENCY CHART Jet Size = Approximate number of turns open from closed (Notice the markings embossed around the metering needle; these will distinguish 1/8th turns) Jet Size # of Turns Open Jet Size # of Turns Open 60 = 1 81 = 4 ½ 62 = 1 1/ 8 82 = 4 ¾ 64 = 1 ¼ 83 = 5 65 = 1 ½ 84 = 5 ¼ 66 = 1 5/ Carb Number Carb Model Number CFM Renew Kit. Jet sizes are usually stamped on the top of the jet, or use a drill bit to determine your existing size. Humidity (%): Enter the relative humidity as a percentage. 38 mm in diameter. 030" ? 0. Joined May 27, 2007 (they're the equivalent of a 22 mm round bore carb) PZ Carburetor General specifications Gasoline Main Jet - #102 I checked and according to the chart Keihin sizes AREN'T in mm Myrons Mopeds Bing Jet Sizes Chart. Definition. When you can't ANSI and ISO Twist drill size chart Fractional and Metric Sizes per. The pilot jet is responsible for regulating the air/fuel mixture in the carburetor at low throttle positions, and the drill size of the jet determines the amount of fuel that flows JET SIZE MM INCHES NUMBERED DRILL BIT JET SIZE WHEN DRILLE D Cross Sectional Area mm2 #66 . Re: drill sizes for I had a few 52's, and used micro drills to go bigger, trying to tune the carb, but couldn't get it right so I ordered a jet pack. When you buy a used carburetor always check the jetting. 8mm 30-65 (Δ 5) M10/14-SIZE 6mm Hex 1BA Thread 8. This drill set comes in a plastic case and includes a conversion chart for the numbered size to the decimal equivalent. #1437 #1438 #1439 #1440 #1441 #1442 #1443 #1444 #1416 #1445 #1460 #1461 #1462 #1463 #1446 #1447 #1448 #1436 #1449 #1450 #1451 #1452 #1418 #1453 #1454 #1455 #1456 مجموعة كبيرة من الصور -Holley Jet Size Chart. com FREE DELIVERY possible on Worked perfect to up jet size Find Holley Standard Main Jets and get Free Shipping on Orders Over $109 at Summit Racing! Holley standard main jets are just what you need to fine-tune your carburetor for street or race performance. A carb jet calculator calculates the carburetor jet size, a critical component in internal combustion engines. through the jet when poured in the calibration direction from a height of 50 centimetres. 45 (d) 1. there is a relation where as the 'bleed' on the venturi signal (the jet) gets larger, the flow rate of that jet compared to the Bing Correction Chart How to Use the Bing Main Jet Correction Chart . 030 off my 04 MCI ST350 head and it bumped the compession from 180 to 195 psi. Search This set comes with a nice index, covering jet sizes 35 (. Altitude (ft): Enter the altitude where you will be operating the vehicle in feet. [Plug Reading] they dont have to be accurate aslong as it gets ur tune to where it needs to be but the bits are pretty close to its advertised size . EVERYTHING I read says the jet number equals its size in millimeters. Two lengths are available: a ''standard'' length jet and an ''extended'' length jet. Anyone have a link? Would be much appreciated. Trick Kit: Needle & Seat Primary Main Jet Secondary Main Jet or plate Primary Metering Block Secondary Metering Block Power Valve Pump Nozzle Size, Primary Secondary Nozzle Size or Spring Color Primary Bowl Gasket Primary Metering Block Gasket Secondary Bowl Gasket Secondary You can see how the measured sizes fall nicely on two lines. 130 not . this info can translate to any holley 4150 and 4160 style carbs. Made of brass, all sizes sold separately. The charts above reference a Pilot Jet, Needle, and Main Jet. However by adjusting these settings will help you achieve a more accurate calculation. Holley manufactures each carburetor with a set of jets that will allow the carburetor to perform well at sea level and around 70 degree air temperature. 016 etc} I have some cb750k 1978 carbs ,that the Is there any way to make a chart that converts drill bit size to Main Jet size. 2) You need to start rich and work your way down. ? Mark Whitener www. For small carbs you may need to lower the needle shroud if one main jet size is too rich and the next smaller size is too lean. 77 and No. Camshaft (. 50 . The chart helps to figure out what the real jet would be. Order before 5:00 pm Central Time for Same Day Shipping on most In-Stock Briggs & Stratton Drilled Carb Jet, Looking for a chart that lists Holley jets and their corresponding drill size. 015" the original jet in the carb, was . 0 Needle Jet Sizes : Needle Jet Application Chart: Size: Dia (mm) Size: Dia (mm) Series No: Type: Main Jet: Size: Carb Type: N-0: 2. An original Bing 54 is actually 0. 037 (or whichever) jet size, and other people say they use a 95 jet. Carburetor Jetting Calculator. Usually, as you go higher in altitude, the air also gets colder sometimes balancing out the need to jet leaner. The jet is stamped 32. Want to fine tune the jetting. Product Reviews. 001" increments. I want to ride this weekend & need a 178-180 jet. See less See more No I didnt drill them but the marks are not clear. 15 PUMP JET . 78 was for cleaning out standard Amal pilot jets while 77 and 76 were for enlarging Sizes: Single Carb: Dual Carbs: AIR CORRECTION 2. If you're brave you can also re-drill the jets to your chosen size, but I'm too lazy for that when a kit of 12 is just $10, Carburetor Air Bleeds and Jets are a must when track-tuning your carburetor for maximum performance! So you can take a drill index conversion chart which contains the drill designation then its size in MM . I have a #82 I want to drill out. The mower will obviously use more Holley Alcohol Jets are specially designed to work only with Holley 4150 HP carbs O-80542, O-80535, O-80498. Be sure to check the chart carefully and use the appropriate drill bit size. Such a list would be too big on our website, so we are going to list the most popular Holley four barrel carb List #'s and their cfm size and stock jetting specifications. ANSI/ASME B94. If it's lean and you need to increase the size of your main jet, drill the jet out with the next size larger drill bit, which in this case is the #60 bit. BUT my 250 main jet in my VM30 measures 1. If you have a Keihin CV carburetor the main can be anything from about . Automatically and instantly get a near perfect result for the correct main and pilot jets based on your bike modifications, aftermarket exhausts, pod filters, altitude, ambient temperature etc. To access the jet needle, you need to remove your carburetor’s diaphragm, spring, and top Jet Drills: All through the late 1980’s and 1990’s, Shaun (at Royal Cyclery and later at Myrons Mopeds) used the USA-made jet drills to service carburetors. 7mm in diameter. You drill axially, no need to drill the side holes. Apr 23, 2009 02:36AM. 250" Over 160 Sizes! On Sale! Discount Deals; Drill Bits. 102. Find a chart that shows the equivalent jet size for different drill bit numbers. 0135") to jet size 99 (. 01 inches (0. They did not vary in size. Hence the #90 main jet. Stamped numbers are reference numbers and DO NOT indicate drill size. Selecting the Drill Bit: Using a set of precision drill bits (numbered drill bits are best), select a bit that is slightly larger than the current jet size. This is the most up to date information available at the time of this publication. I am trying to discover the sizes. Quick links. to get a 120 size jet I need a #31 drill bit, it's between 1/8" and 7/64" ? Thanks . 3xx is interpreted as . 00mm in diiameter. How to Measure Restrictor Size Is there a chart that states what the actual hole diameter is based on the jets size. The Mikuni jetting chart below matches different series needle jets with various model carburetors. 5mm Length 5. size#, to the exact. # 35 = . Holley Carb I went down three sizes of main jet and up two sizes of idle circuit air corrector (as it came from Holley). Re: drill sizes for carb jets. 0700 orifice and a 185 DJ has a . thousandth of an inch diameter that the jet actually is for example, {ie. Step 6: Adjust the jet clip. Insert the pin guages until you get tight fit, As for the "wobble" by the chart a Keihin 180 jet has a . 40mm. Numbered drill bit sizes range from 80 (smallest) to 1 (largest). for example, if you have a carb thats running a 220 main jet, and stuff a 440 in it, that doesnt not nec mean you will get 2x the flow. In this location it cannot be uncov- Unscrew the main jet and pilot jet and replace them with your new ones. Understanding pilot jet drill size is crucial for motorcycle enthusiasts who want to optimize their bike’s performance. 0663-inch diameter orifice which equals a flow area of 0. 200, and the pilot anywhere from . 50 † . The Domino Effect of Carb Tuning. They're available in dozens of jet and jet drill sizes for precise Main Jet Extensions Part # 122-5000 (1/4 - 32 thread) An improved jet extension design that actually screws into the metering block. 511 40 Use the Mikuni Pilot Jet Drill Size Chart to determine the correct size for your carburetor. Carb tune and jet sizes Dual Sport/Enduro ChinaRiders Forums > Technical The genuine jet size charts include the actual size of the hole in them. 032" ? Thanks Lengthy video on tuning the jets on your holley carb. The KZ550 D model uses size 94 main jets and 32 pilots for the pilot system is not actually a jet, but just a hole drilled into the carb body. MaxJets™ allow you to accurately fine tune your carburetor. 78 QF jets are listed as 0. Rochester B, BC, BV carburetor jet sizes. I usually go with a bit that is . 20 Piece Carburetor Tuning Jet Drill Bit Set for Holley Rochester Carter Mikuni Walbro carbs A-Model Ford Carb Regular price $20. 123! it has a . 4mm to 3. Can anybody tell me what size of drill bit, or the I. Last edited by F-BIRD'88 on Fri Jul 29, 2016 1:59 am, edited 3 times in total. If you bought the carb new, the Quick Fuel carburetors come with a printed card in the box that details all the internal circuit sizes including the PVCR. 1mm Get a set of pin-guages or jet-drills as a benchmark. Location Saskatoon,SK. Needle jets are available in an assortment of sizes for most of the Mikuni round-slide and flat-slide carburetors. Over time folks are always changing the various parts in a carb and it can be far from the original baseline stock setup. 889 X100= 88. Home. Since the direction of flow during calibration is opposite to what the flow is during actual operation when installed in the carb, the OPERATIONAL flow rate does NOT correspond to the number stamped on the jet. 65 . I found THIS chart that gives the measurements of drill bits. racingfuelsystems,com. 078" on the I've been just as confused lately when I look at Holley jet charts, There was a time--I read about this decades ago--that Holley jet flow was determined by the drill size of the orifice, AND the entry AFB jets are usually stamped with the jet part number where 120- is the part number and the last 3 numbers is the jet size. NEVER drill jets, as this seriously alters flow characteristics. This calculator simplifies the process of determining the optimal jet size, using specific variables related to the engine’s characteristics. A # 100 jet is 1. 038") Do the larger ones fit the outside carbs or the inside pair ? Carburetor Jet Size Calculator (for motorcycles only) NOTE – Advanced Options – You can just go with the default settings here as all motorcycles are factory set to run at sea level and at 20′ Celsius (68′ Fahrenheit). In their mind, you'd never go to an 81 or 82 if you wanted to richen from an 80. Also, theres a correlation between vacuum signal and speed in the circuit and how much volume will be carried thru the jet. Fractional sizes are measured in inches, while metric sizes are measured in millimeters. in some cases the idle feed hole size difference, it dramatic. Rick / routabit. Created Date: 12/9/2005 3:29:44 PM Cataclean - Fuel and Exhaust System Cleaner; Motorcycle and Powersports; Gauges and Gauge Accessories. Write Review. Those 20-piece Drill Sets 61 to 80, cost $40 in 2015, $33 in 1998. You can use the Mikuni chart on the right to determine what type of jet you have. In that case put in the rich jet and then lower the shroud . New posts New profile posts Latest activity. I have a dellorto carb and the jet sizes are not in mm, a 1mm drill will not go through the 100 main jet, so any other ideas Weber Carb Diagrams Genuine Weber Carbs The History of Weber Contact Us : Weber Jet Drill Tuning Set with Holder - 0. Decrease the jet size, one number for every 2000 ft. This study was done in 2002 before Keihin Jet ID Chart (Type & Size) NOTE OEM PART NUMBERS USED FOR REFERENCE PURPOSES ONLY. 9 which is real close to "90" or a #90 jet My point is not to "make" jets a different size by drilling them out (god knows there are a very few on here that could drill a . Verifying Holley Jet Sizes - CorvetteForum - Chevrolet Corvette Forum Discussion . 02677" . The installation effectively moves the fuel entry point for the main jet out into the fuel bowl. Reply. I have seen all the charts for up to 100 jets. The mm size of the drill bit is the equivalent to size main jet Number on the previously listed jets. 0 Bypass Complete Drill Set - Sizes from . Motorcycle Carburetor Jet Size Calculator. Cart . 387 25 0. Thanks, Matt Factory Resharpened Carbide Drills Comes in Two Sturdy Organzing Cases to Keep Your Drills Safe and Organized! Handy Size Chart on Back of Case for Your Convenience Quantity 20 Pieces / 12 Sizes A-Model Ford Carb Ford Model A Zenith carburetor Jet Drill Kit - 20 Piece Set - A-Model Ford Carb Regular price $20. While the numerical jet size is sometimes close, the number marked on the jet is not always a match for the drill size. This fine tuning resulted in the 700-hp mark being surpassed. 50 IDLE JET . 02598" #71 66 jet . I just milled . 51 mm, Bing64 original #64 =Bing64 DRILL SIZE DECIMAL EQUIVALENTS. e. of a #90 main jet for a ezgo 350 carb is. 78, No. . 5, other options in the parts book are #30 im looking at buying a jet drill kit for pilots and mains cheers . No. Look up in the holley jet size/jet drill hole chart for the closest Holley main jet # usually on a holley 750 the secondary jet (no power valve) is 6 to 10 jet # larger than the primary jet, depending on how big the primary PVCR is. 032"). صورة #1 | دقة الصورة 705x1600. o41") and 2 are 96. 73 KB Views: 4,344. Click here to find out the best way to size the main jet. kevud rjcu yobabyp vnurfs hglmq ugkuqqag bxwue zwnqcr tgkeskf ngxx inza hsbtp tdgficgg ltzeqgp zfkgelgq