98 fourtrax 300 4x4

can't help you on the over bore kit ?, but the seal is easy to replace, remove the middle shaft, pry out the old oil seal, tap in the new one, very easy. just be careful when prying the old seal out !.

How do you remove the middle shaft?

Hondaguy98 said:

How do you remove the middle shaft?

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get your hands on a service manual for starters . but to answer your question : you need a pair of snap ring pliers, on each end of the shaft is a metal cover ring, inside the ring is the snap ring, use the pliers to spread the snap ring, and pull it inwards out from inside the cover ring, do this on both ends, then take a drift punch, flat blade screw driver, and tap the collar in towards the middle of the engine cover and shaft, when you do this on both ends ?, the shaft will separate from both splines at each end, then you can remove the shaft, and get to the oil seal .

Hondaguy98 said:

It needs a top end and I can't seem to find a rebuild kit for one that has been bored over 40 And also the only place it leaks from is where the 4x4 shaft runs alongside the motor in the rear Anyone know how hard it is to replace the seal?? Thank yall

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Try Wiseco, I'd have thought they'll have a piston to suit your needs. Other than that it's a rebore/new liner job.

SamUK said:

Hondaguy98 said:

It needs a top end and I can't seem to find a rebuild kit for one that has been bored over 40 And also the only place it leaks from is where the 4x4 shaft runs alongside the motor in the rear Anyone know how hard it is to replace the seal?? Thank yall

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Try Wiseco, I'd have thought they'll have a piston to suit your needs. Other than that it's a rebore/new liner job.

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wiseco is a great brand, but !, you must buy the whole piston kit !, you can not use any other piston rings with their pistons !?. it's go full blown with them ?, or go another brand.

^^ Yep, the old guy above is right :laugh: I should have mentioned that lol

SamUK said:

^^ Yep, the old guy above is right :laugh: I should have mentioned that lol

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see, old age does teach ya a thing or too !..lmao.

At 40 over you are already at the 4th cleanup bore (+1mm), which is usually considered about the limit on a stock cylinder. That is why you are having a hard time finding a kit.

Rob