Motorcycle Top End Rebuild for Four-Stroke (Part 2 of 2)

http://www.rockymountainatv.com Piston and Ring Replacement on the KTM RFS motor. Rebuild the top end on your 4 stroke atv or motorcycle. Piston change.

Category:

Autos & Vehicles

Tags:

• Piston
• ring
• wiseco
• topend
• ktm
• honda
• yamaha
• suzuki
• cometic
• valves
• cylinder
• atv
• motorcycle

[HondaRider342Q]

I have a 2005 crf250x that i ran dry on engine oil so i adjusted the valves and it runs but should i do a top end rebuild new valves, piston ect... And can i just hone the cylinder on it?

[RockyMountainATVMC]

@HondaRider342Q - you would need to pull it apart and inspect it. then go from there.

[njpaul78]

Great vid! im attempting a rebuild on my 07 wr 450, when i get to reinstalling cams and timing how do i hold TDC? i dont believe i have that locking screw anywhere, how can i make sure it doesnt move while i put the chain on the cams? thanks!

[RockyMountainATVMC]

@njpaul78 - no locking screw. just timing marks on the cam gears and flywheel. Easier than this KTM.

[yittymitty11]

@ollybb12 you would check just incase they didnt do them

[RockyMountainATVMC]

@PureN3WZ3ALAND - a lot of factors play into that. regular instection is a good idea.

[PureN3WZ3ALAND]

@RockyMountainATVMC

i have an 07 kx250f and i heard that your supposed to have it rebuilt ever 40 hours

is this completely necessary or would i get away with just getting the valves done?

[ollybb12]

Couldn't you have gotten your valves adjusted when you sent your head off?

[njpaul78]

@RockyMountainATVMC---- Great thank u!

[RockyMountainATVMC]

@sejlefrew - this 4-stroke is by far little more work than most I must admit.

[sejlefrew]

ktms are a beeech