valve service

[skipa]

Thinking of buying a yzf250 but know nothing about engine.If i ride 1 weekend a month how often do i need to service engine/valves.I heard the valves loosen and need adjustment every other ride.is that true?Is it hard to do :coocoo: :yikes:

 

[junkjeeps]

General rule of thumb is check/adjust every 10 hours.

 

[skipa]

how do you check?

 

[sixds]

You buy a service manual.

 

[skipa]

seems like lots of maintance for 4 strokes

 

[sixds]

seems like lots of maintance for 4 strokes

There is a lot of maintenance for two strokes as well but the damage isnt that bad when you ignore maintenance intervals.

 

[riot983]

Approximently how many hours does it take to check valves?

 

[IndyMX]

Depends on who is doing the checking.

If you have limited mechanical ability, it's going to take longer than it will for someone with experience working on engines.

 

[njkx]

I have an 05 yz250f. I check the valves every 20hrs or so. I am a total novice mechanic and it takes me approx. 1 hour start to finish to check them. The bike has around 60 hours on it and the valves are just now getting on the tight side but still in spec. I change oil frequently and am rarely on the rev limiter. C class Vet rider...mostly practice for fun and a couple of races per year. If you are only riding once a month and you are up North (not riding indoors) I don't see you having to check the valves more than 2X per season.

 

[njkx]

I am a total novice mechanic and it takes me approx. 1 hour start to finish to check them.


I should say that the first time it took me more like 3 hours to check them.

 

[BigRedAF]

Pull off your seat, tank, spark plug cap and valve cover. If your working in a clean organized spot that shouldn't take more then 10 minutes.

Set top dead center and stick a feeler gauge in to measure. If you need .006-.009 then just make sure a .005 will fit and a .010 wont. If your clearances are good then put it back together. If your out of spec then get ready for some fun...