first gen cam end-play

Ernest Montague afm199 at earthlink.net
Thu Apr 29 07:52:51 PDT 2010


There might be a tiny bit of play. Are the cam sprocket bolts hitting 
the cam chain guard? ( the piece that covers the cam chain and has 
three bolts holding it down). That is common.
On Apr 29, 2010, at 7:45 AM, Morgan Jones wrote:

>
> Hello Everyone,
>
> I am only a weekend mechanic so bear with me if my terminology is off..
>
> I recently had some motor work done on my worked '99 SV650.  The front 
> cylinder needed a new base gasket and 2 new valves.  The work was done 
> by a competent motor builder.  He's a little resistant to the idea 
> that he did anything wrong so I'd like some insight from you folks 
> before talking to him.  If I can fix this myself all the better.
>
> I just started the motor for the first time since the work and it 
> makes an ominous clunking noise from the front cylinder when the bike 
> is tilted to the left.  You only have to tilt it slightly: think 
> leaning the bike to avoid another bike while backing out of the 
> garage.
>
> I pulled the front valve cover with a friend and local Euro mechanic 
> and the top cam moves left to right just slightly but enough certainly 
> to cause the clunk.
>
> The bike is far from stock: it's a 680, has Yoshimura race cams and 
> modified valves.. I did not have the work done though I've had the 
> bike for years and probably 25 track days so there's nothing 
> inherently wrong with the bike.
>
> I presume there should not be right-left play in the cam?  Is there 
> adjustment?  We know the cylinder was removed so is there a chance 
> there's something missing or an adjustment he failed to make?
>
> Any insight would be great.
>
> thanks,
>
> -morgan



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