Please help identify jug 654CC

[Streets]

I have a set of jugs that are stamped 654CC rather then the 653CC's I have. It is a 4 bolt cam tensioner.
My guess is early XS1? thanks for taking a look and the help everyone.

 

[Streets]

a little more description.. it does not have sound deadening isolators between the fins. possibly taken out? forgive me if it has been mentioned somewhere sometime on the forum.. I have used the search but came up with nothing specific on this. again thanks for taking a look and the help!

 

[Jim]

Just looked at my XS1 motor and it says 653CC...

 

[TwoManyXS1Bs]

Those sound deadening buttons were only in the head fins.

There *was* a change in the cylinders, and the front camchain guide's hollow bolts, at s/n S650-002487. I don't know specifically what actually changed, but a comparison of those "cylinder guide bar nuts" may shed some light. My (later) XS1B cylinders show 653cc.

At the end of this thread is an engine change chronology. That s/n 002487 is listed there.

http://www.xs650.com/threads/yamaha-xs1-xs1b-xs2-tx650-tech-bulletins-service-data-brochures.31022/

 

[Streets]

Thanks for the responses and help guys, as I mentioned.. I have scoured the forum and the world wide web for info but nothing specifically states the 654cc.. I guess I will chock it up as a pretty early XS1? perhaps from S/N 002486! I have about a truck load of parts that came from an ol' flat tracker. some of the parts from that have included bored jugs stamped HARTLINE.. that I have found was a flat track racer back in the day Gene Hartline, a few cam's Shell Rods, a few cranks with the pins welded.. must have been an old race trick. it's been an adventure digging up info on this stuff! and a couple early motors without the starter. Again thanks for the responses.

 

[fredintoon]

Hi Streets,
my best guess is that the jugs are aftermarket and the cast in place capacity number being upgraded by 1cc to 654cc was done for legal reasons.