Questions & Answers for: main jet yamaha yz 125

main jet. the plug I'm at 5400 ft and running a 490 main jet on a stock motor. the plug is showing lean. Oem spec for sea level is a 410. plug looks the same with a 380 main or a 490 main. why can't i

yamaha yz 125 1994 what are the carbs original jet sizes(pilot and main)on mikuni carb Can I get a ?very helpful? rating on this answer? Thanks!

...the spark is good, and the reeds are fine...the bike fires up nice just will not hit powerband and wants to die Look at ? crank seal (drawing air) ring wear main jet (blocked jet's) fuel starved ...

...main jet? What exactly would it do for my 2001 YZ 125? a bigger main jet will make the bike run richer which means more gas. unless you have changed something on the bike which would involve a bigger ...

...at full trottle. can you tell me why You might have some dirt or something floating in the carb bowl, and at full throttle it may **** it into the main jet. I would go through the carb

...main jet on mikuni ucal and spects for pilot air jet 1 and pilot jet 2 http://www.cmsnl.com/yamaha-yz125r-2003_model11245/partslist/A-12.html Site above has all the parts and specs for your bike. Jet ...

...jet and main jet. Go to your local shop and get their recommended starting point - this is the fastest way. If they don't have an answer, go to a real shop. To check the timing, you need a dial ...

what is the size of main jet of YZ125? Main Jet: 410 Main Air Jet: 2.5 Jet Needle: 6BFY43-74 Needle Jet: S-1 Pilot Air Jet 1: #40 Pilot Outlet: 0.7 Pilot Jet: 40

...main jet 2 a 450 ? And the pilot jet 2 a 25 ? But it seems like it is holding bk and wont rev out over half throttle ? Does Eny 1 no wot the problem is cheers 4 ur help Hi, Dean for this situation I ...

...jet, main jet, and air jet. 5. 3/4 to wide open throttle is managed by the main jet and air jet. 6. Wide open throttle is managed by the main jet. If you are running lean, spark plug electrode color ...