Anyways, Put a new cam in and upgraded to CRF450X timing chain, and come other little things. Fixed the tick 🙂
Got it all back together went to take off and ride and it will not rev past 3/4 throttle. Ran fine before I fixed the tick. It starts spitting and sputtering..
Usually when the carb needs jetting, when it gets to that part of throttle percentage, it will act like its dying, jerking, hoping, etc. This isnt that case, It literally sounds like the Over rev kicks in. So its a smooth spit/sputter. Once again, it ran 100% before i ever started working on it. Went ahead and bumped the main up to a 170. No change.
440 Kit
K&N Filter
No lid
Alabama 400 – 800 ft
So 170 should be more than enough.. Still didnt work:dry::dry:
The choke is NOT on.. (learned that about 8 years ago lol. Cleaned carb about 4 times and still wouldnt rev past 1/4 throttle. Felt like an idiot)
I dont think it is the timing though.. It starts easily and runs great until 3/4 throttle. If it was the timing, it would act up as soon as i started revving the throttle..?
I have a lot of experience with the 400EX engine.. A LOT.
But i guess there is that 1 in 50 chance it may be one tooth off? But i highly doubt it. lol
I will get my timing light out tonight and verify for sure.
In the mean time, anything else i should check?
…………..Reasonable Ideas please…………………
