@@Russellscottx i agree . in the service manual the jetting is dependent on altitude and temperature . after rejetting it ran a lot better . took about 30 minutes and was just the needle , and the pilot . the ones to use should have come with the bike so you don't have to buy them . i also really suggest going to a 14 tooth front sprocket , and a 48 tooth rear ( factory is a 13 and 49 ) . with the 14/48 , you lose 10% at the low end , but gain 10% up top ( #'s are from a sprocket calculator compared to factory ) . and it really further broadened the power, prob 2x as noticeable as my exhaust mod . i went with a pro circuit carbon silencer and a bills pipes pipe . and i run VP t2 fuel which is a 40:1 , with a little Motul 800 series oil added to bring it back to the suggested 32:1 . id bet i gained 7-10hp up top and 2000rpm more usable powerband . world of a difference over stock . next plans are to replace the oem piston , i guess they are prone to cracking, and a forged is suggested so you don't have to risk cylinder damage . easy job , not much $ , and raises compression a little. .
Yeah that FMF is exactly how it should sound! That thing is too fresh!
Thanks man!!
keep 32:1. Swap in a 55 pilot jet. On hot days go down to a 52. For sand tracks go up to a 172 main.
The best Stock Exhaust
When you replace the exhaust, did you have to re-jet the carb?
Where did you notice the power increase?
You just need to change your jetting to match the fmf jetting specs. Don't change your fuel and oil ratio. Then it will really open it up
Thanks for the info
@@Russellscottx i agree . in the service manual the jetting is dependent on altitude and temperature . after rejetting it ran a lot better . took about 30 minutes and was just the needle , and the pilot . the ones to use should have come with the bike so you don't have to buy them . i also really suggest going to a 14 tooth front sprocket , and a 48 tooth rear ( factory is a 13 and 49 ) . with the 14/48 , you lose 10% at the low end , but gain 10% up top ( #'s are from a sprocket calculator compared to factory ) . and it really further broadened the power, prob 2x as noticeable as my exhaust mod . i went with a pro circuit carbon silencer and a bills pipes pipe . and i run VP t2 fuel which is a 40:1 , with a little Motul 800 series oil added to bring it back to the suggested 32:1 . id bet i gained 7-10hp up top and 2000rpm more usable powerband . world of a difference over stock . next plans are to replace the oem piston , i guess they are prone to cracking, and a forged is suggested so you don't have to risk cylinder damage . easy job , not much $ , and raises compression a little. .
you should do the test with the bike heated
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The fmf will get deaper as the muffler breaks in
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