Install a main jet that is two sizes richer (the number on the jet will be higher on a richer jet). Do a test run again, pay attention to how the bike feels! It's very important that you start with the pilot circuit. Need to find out how far I will need to drop in jetting. Leak Jet 60Fuel Screw 2-1/4NNWT Needle is 1/2 clip richer than Stock needle. Choose the nearest jet sizes to this number, in this case 160. Always check that your jetting is correct when changing parts that could affect the intake system, exhaust system and any product or change that could alter fuel combustion in the cylinder (ie. Currently, running a 190 MJ, 45 PJ.... Any takers? After you have made your test run with the stock jetting. what jetting should i use right now its the stock jetting 230 main, 32.5 pilot, and 1.5 turns out on the air screw i checked the plug and it black any help will be greatly appreciated thanks aftermarket ignition module). i have the fmf fatty pipe and powercore 2 silencer also. I've noticed a jetting chart floating around here. Please remember that sometimes the stock OEM jetting will work just fine, other times you may have to make an adjustment, so use our suggestions below as a guide to help with your jetting problem. Jetting Your Slide Valve Carburetor (PDF) Jetting Your CDKII Diaphragm Carburetor (PDF) Jet List (PDF) Slide Chart (PDF) Jet Needle Changes For FCR, FCR-MX (PDF) Jet Needle Changes For PJ, PWK, OEM-N427-48xxx (PDF) Jet Needle Changes For PE (20mm-24mm), PE, PWK (PDF) Jet Needle Changes For CRS (PDF) I got a trip to St. Anthony's comin up. hey guys i have a 1997 blaster bored 20 over fmf gold series head pipe and a powercore II silencer boyseen reeds and a stock aftermarket air filter. Where to most people end up jetting a stock 2006 CRF150F. I currently ride at 900 ft. St. Tony's is 4800 ft. Jetting – CRFsOnly.com ; Pictures ; Address 1930 Carpenter RD SE Lacey, WA 98503-2915 United States of America Phone: 360-350-0557 Email: tech@jdjetting.com # tuned. The pilot circuit affects the entire throttle range. 4. 1 2. By Jared23x, January 15, 2020. The main jet needs to go down by "-38" therefore the jet needed is 200-38 = 162. Jetting is fairly simple, and is a useful skill to learn if you ride a two-stroke and want it to perform at it's best. By tonyown, June 18, 2006. It is beneficial to purchase a larger and smaller jet as the calculation is an approximation. a 32.5 pilot jet and the airscrew 1 1/2 turns out. Add the two numbers together: -42+4= -38. FMF Racing is not responsible for problems derived from improper jetting and/or usage. I have removed the air box cover but left the spark arrestor in (I thought it was too loud without it). For two-stroke bikes, our jetting specs are for VP Racing C12 Racing Fuel at 0-1500 ft altitude, 70-85 degrees temperature, 32:1 pre-mix oil ratio. Jetting FMF fatty's 1 2. Gave jetting specs based on elevation. Motorcycle We use cookies to make your experience better. 3. I changed it to a 115 main and put in the dealer recommended 16012-KPT-921 needle in, 1 clip richer from the middle (I think it was the third groove from the top). I have boyeson power reeds in mine and a foam stock tyle air filter with the airbox lid removed. I am running a 260 main jet with the needle on the 4th clip. To comply with the new privacy regulations, we need to ask for your consent to set the cookies. 19 replies; 6.8k views; FatMofoFast; January 21; Banshee bogs on take off. The reason is simple. Since the temperature is dropping -10°, chart number is "4". By Metal_man_Rob, January 12. The main jet. Cookie Policy. Stock jetting is good for Hi-Temp summer days at tracks with a little altitude and, or humidity. The carb's main jet affects how the carb works from half throttle to full throttle. 24 replies; 871 views; Keithrc1988; January 18; Carbs and pods, velocity stacks and air boxes 1 2.
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