2004 Trx Bored to 426cc I GOT A PRoblem!! - ATVConnection.com ATV Enthusiast Community

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Old 01-07-2017, 02:38 PM
Weekend Warrior
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Join Date: Jan 2017
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Default 2004 Trx Bored to 426cc I GOT A PRoblem!!

Ok so i have this beast of a 400ex i bought about a year ago, has run great since i got it. the guy i got it from told me i would have to adjust the valves every couple of hours so like the lazy bum i am, an never really had experience tweaking with the engine i never adjusted them. so it has a bad sounding tick in the top end. i was adjusting them last night and was trying all kinds of different tweaks cause the stock adjustment still had the ticking in the top end. i have a curtis sparks x6 ehaust on it and the guy i got it from has some jetting done to the carb but i haven't got to lookin into that yet. anyways i knew i have fukks something up probably from my laziness of turning a few bolts so i tear the top end apart and it hurt to see what i found. imma put the picture up but the rockers at the top of the motor which rubs on the hot cams lubes was all messed up the cams lube is teared up and the piston is bad. the main thing im asking is since it is already bored to the 426cc i dont want to go to the 440 because of the loss reliability whats the most economic way to go with this, i love the bike style and just great all around bike hate to get rid of it so i wanna really put some work into getting it right, any suggestion would really be appreciated as it is the first time tearing the top end off a 4 stroke. thanks a ton
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Old 01-07-2017, 02:45 PM
HawkeyeRider's Avatar
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Join Date: Apr 2009
Location: Albuquerque, NM.
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Might want to post this to the honda forum, you put it in the forum software help section.
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