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I'm going to attempt to check the valve clearances and re-shim on my sons 2007 crf150rb since it is getting hard to start. In the manual it mentions a Tensioner stopper tool. Is there a way to do this with out the tool?
Also is there a How-to or Walk Thru that someone has put together that i can refer to while I'm doing this.
Thanks in advance for your help

This How To shows how to do the tensioner without the fancy tool.

http://crfsonly.com/howto/crf250x/crf-v ... stment.php

Thanks ~
Looks like I have everything I need. The only other question I have is the Hot Cams Shim kit comes in .05 increments and the Stock Honda shims come in .025 increments. Is it possible to run into an issue where I will need one of those in between sizes?

jorem50 wrote:Thanks ~
Looks like I have everything I need. The only other question I have is the Hot Cams Shim kit comes in .05 increments and the Stock Honda shims come in .025 increments. Is it possible to run into an issue where I will need one of those in between sizes?

If that is the case, err to the tight side of spec.

How do i get the two bolts that hold the cam sprocket on off? it just keeps spinning around. I'm afraid to stick anything in there for fear I might damage the cam housing or something.

Put it in gear and have somebody stand on the rear brake.

I'm trying to take the CAM sprocket off. I don't think standing on the rear brake will do anything for that!

jorem50 wrote:I'm trying to take the CAM sprocket off. I don't think standing on the rear brake will do anything for that!

Really?

Did you try it??

I got the cam Sprocket off, Held up the cam chain with wire and removed the cam housing. measured the old shims and figured out what new shims i would need. Put the cam housing back on and the cam sprocket and chain, but now i think i may have messed up the timing or something because if I try to turn the crank to get it back to TDC it gets to a point where it just stops. Like something is hanging it up. I did turn the crank before put the sprocket back on> So now I don't know how to get everything lined back up.
Any help would be appreciated

~
It doesn't make sense to me why putting it in gear and stepping on the rear brake would work but since you are the resident expert on heads I decided I would take your word for it and try it. The cam still kept turning. Since it did not work would that indicate another problem?
I ended up getting the bolts out and finished my valve adjustment. Only took me two and a half days, next one should only take an hour or so.
Thanks for the Info

jorem50 wrote:~
It doesn't make sense to me why putting it in gear and stepping on the rear brake would work but since you are the resident expert on heads I decided I would take your word for it and try it. The cam still kept turning. Since it did not work would that indicate another problem?
I ended up getting the bolts out and finished my valve adjustment. Only took me two and a half days, next one should only take an hour or so.
Thanks for the Info

It would tell me that your clutch is on it's way out.

Putting it in gear would engage the crankshaft and the transmission via the clutch. Once the transmission is engaged, turning the engine over would turn the transmission and in turn the chain and rear wheel. Putting the rear brake on would stop it and all other components in the system from turning.

The fact that it would still turn tells me the clutch is slipping.

Thanks for the response. The clutch was next on my list of things do do anyway. My son says it feels fine but I think he's just gotten used to it. This will be my first clutch replacement, any tips on installation and which clutch kit to go for?

Clutch replacement is an easy job, straightforward.

I am a huge fan of DP clutches. They use steel plates instead of aluminum. This reduces clutch fade and adds a little rotating mass to the crankshaft. Makes for better power transfer, traction, etc.

http://www.crfsonly.com/catalog/product ... ts_id/2863

~'s way works.

Another option is to put an alen socket in a breaker bar into the right side crankshaft hole. Rest or clamp the breaker bar on the foot peg.