BBK tensioner mismatch - resolved

[jpdevol]

Got the yamahaxs650.com 750 kit installed in the '75 model (bagger), but the cam chain tensioner presented a problem:

Well....this ain't gonna work (Also nice shot of the new engine stand adapter from Chop Source....works great!)

This is with the chain properly adjusted - with ~1mm plunger rod movement while rolling the motor - the adjuster bolt is waay too long!
The tensioner assembly is the one that came out of the motor it is a "C type" assembly: obviously won't work in the BBK cylinder set-up

Luckily, the spare motor came with an "E type" tensioner assembly - Let's try that!

AH......that looks better

Now to try and shoehorn this thing back home into the frame..........

 

[Jim]

Good to know stuff.

 

[Vincenthdfan]

Got the yamahaxs650.com 750 kit installed in the '75 model (bagger), but the cam chain tensioner presented a problem:
View attachment 250449
Well....this ain't gonna work (Also nice shot of the new engine stand adapter from Chop Source....works great!)
View attachment 250450
This is with the chain properly adjusted - with ~1mm plunger rod movement while rolling the motor - the adjuster bolt is waay too long!
The tensioner assembly is the one that came out of the motor it is a "C type" assembly: obviously won't work in the BBK cylinder set-up
View attachment 250451View attachment 250452
Luckily, the spare motor came with an "E type" tensioner assembly - Let's try that!

View attachment 250453
AH......that looks better
View attachment 250454
Now to try and shoehorn this thing back home into the frame..........

Man, those jugs look so....beefy!!

 

[magoo66]

That is looking great!

 

[WideAWAKE]

For some reason I thought there was something written on their site about it only working with a later style tension.

I’m not sure how I would have known any other way.

 

[LTGTR]

JP - I agree thats a clever engine stand because that mount has been designed to still allow access (tightening when putting the case halve together) to that bolt on the top of the cases.
My homemade engine stand does everything except allow access to that bolt
Regards Ray.