HEADS UP!!!

Site upgrade in progress... Core site functions are working, but some non-critical features/functions will be temporarily unavailable while we work to restore them over the next couple of weeks.

Please post any bugs you encounter, but before you do, check to see if it's already listed.

Thanks for your patience while we work to improve the community.

Sign in to follow this  
Followers 0
chiricahua

1997 XR650l CamShaft Woes

7 posts in this topic

I went on a dual sport ride a couple of weeks ago and at about the 130-mile mark I had an eerie noise start to emit from my motor.(The noise sounds like a valve ticking.[Loud] But I checked them and they are .004 and .005 which is OK per the manual.)

Looks like a possible de-compressor bearing on the camshaft blew.(Does this even have a bearing? :) Cause it's moves slightly.) Or does Centrifugal force keeps it stable? :)

Looks like when it blew a piece of something helped score one of the rocker arms and the corresponding lobe on the camshaft.

Does anyone know if I buy a Hot Cam with out the decompression system on it if it will make the electronic starting any or much harder on the starter?

Also does any one know of discount Honda parts suppliers other than BikeBandit.com or XR’s only.com and PlanetHonda.com?

Or discount sales on OEM Honda parts?

Thanks for any help or links. :D

Oh Yeah, great site. Glad to be a part of it now :D

Share this post


Link to post
Share on other sites

If the engine has been run low on oil at all the cam lobes wear quickly! After you fix it, use synthetic oil.

Share this post


Link to post
Share on other sites
If the engine has been run low on oil at all the cam lobes wear quickly! After you fix it, use synthetic oil.

So do you think that's where the ticking is coming from? Could it be something else.

And Roger that on the cam lobes wearing.

Share this post


Link to post
Share on other sites

I've know a guy that had part of the decompressor mechanism come loose/fall off. He lost all compression. Don't know if it made noise first.

A lot have posted here about removing the decompressor not affecting the starter operation.

If you get a cam, a thing to check for is if it's a 'hard' cam- some aftermarket cams can tear up the stock rockers.

Dave

Share this post


Link to post
Share on other sites
I've know a guy that had part of the decompressor mechanism come loose/fall off. He lost all compression. Don't know if it made noise first.

A lot have posted here about removing the decompressor not affecting the starter operation.

If you get a cam, a thing to check for is if it's a 'hard' cam- some aftermarket cams can tear up the stock rockers.

Dave

Right Dave, I just read that if you use Hard welded cams then you need to use hard welded Rocker arms. Which can be quite expensive from what I just read.

My bike had lost a lot of compression but it runs now. I'm looking for a cam and one rocker arm to replace and then see how it runs.

Thanks for the coment. :)

Share this post


Link to post
Share on other sites

The Hot Cam for the 650L uses stock rocker arms, and I have had no problems with the electric starter, BUT I am using a pumper carb.

I replaced the stock cam at 1200 miles. If you want my old cam PM me.

If I was going through the trouble of tearing down the motor, I would go with the Hot Cam and a higher compression piston. I am running the JE 10.5+ Hot Cam stage 1 and really like the combo.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0