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Dirt Bike Brands - Other
4S top end rebuild w/o engine removal from frame ?
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[QUOTE="PK, post: 18143, member: 17470"] I currently have the top end off of my YZ400 for a rebuild, awaiting parts UGGHHH. The KTM's can be done as well with the motor in the frame. The main difference, 4 vs 2 stroke, is pulling the cams, other than that it is not much different that a 2 stroke. It may intimidate you a little bit but I would say it took 20 minutes longer to yank the top end of my thumper than it does to do the same job on a 2 stroke. I also had a vavle that needed a smaller shim to bring it back to spec, but that was a 5 minute deal. Even after yanking the motor apart, I found out that I could have put another year of riding on the bike as everything was still in limits. Pat 99 YZ400 [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
4S top end rebuild w/o engine removal from frame ?
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