Snap Ring to Crank issue

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Blownbug
Posts: 26
Joined: Thu Feb 14, 2019 11:09 am

Snap Ring to Crank issue

Post by Blownbug »

Hey guys,
Has anyone seen this before?
I have a new stroker crank with a CB straight cut gear, and can not get the Snap Ring to install. For some reason, and it looks like it is in the Crank, the gears will not go back far enough to leave room for the Snap ring.
With out a doubt, the gears are on as far as they will go. About HALF of the grove for the Ring is covered.
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66brm
Posts: 405
Joined: Mon Apr 12, 2010 6:55 pm

Re: Snap Ring to Crank issue

Post by 66brm »

What cam drive gear is that? Due to it being aftermarket that's where I would start any measurements. Is the gear hard up against the main bearing journal?
Blownbug
Posts: 26
Joined: Thu Feb 14, 2019 11:09 am

Re: Snap Ring to Crank issue

Post by Blownbug »

The gear is a CB1399 rom CB Performance, and yes, it is seated all the way. After measuring the stock 69mm crank and then this 82mm crank, I found the slot for the snap ring to be 1/16th" difference. I will call Monday with my finding to discuss the fix. I think I could pull the gear and grind the back side, but that is not what I want to do.
twodollardoug
Posts: 136
Joined: Mon Jul 18, 2011 5:38 pm

Re: Snap Ring to Crank issue

Post by twodollardoug »

Or you could machine a groove on the snap ring side. Enough to be able to get the snap ring in and out easily. Have you mocked it up with the cam to see if the gears line up?
66brm
Posts: 405
Joined: Mon Apr 12, 2010 6:55 pm

Re: Snap Ring to Crank issue

Post by 66brm »

Be careful about machining the gear as it may change the position of the dist drive gear in relation to the case/ dist drive shaft
Steve Arndt
Posts: 7420
Joined: Sat Mar 10, 2001 12:01 am

Re: Snap Ring to Crank issue

Post by Steve Arndt »

I have a ~2002 made cb crank. Same problem. I had to have the gear surface ground down and clearance the spacer as I recall (been almost 20 years)
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