Things were going good until....

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hobot said:
When I first took the primamry cover off the primary chain was banjo tight :shock:
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Things were going good until....


OH NO i can grantee your whole power unit is now injured from crank shaft to main shaft and all the bearing and bush supports in between. You can patch the obvious now and ride a bit then have to fix some show stopper away from home, again and again, in sequence of next least injured item giving up or bite the bullet and measure crank run out and go completely through the gear box, listing what you find for our sadistic pleasure side. This is not speculation, if your bike was ridden even once and finding banjo tight primary when cold. OH NO UGH-LY!
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Thanks Sluggo!
 
If you take the primary cover off, it would be easy enough to see if the chain is rubbing. It shouldn't be that loose. Take your clutch pack apart and put the GB in all gears and rotate the rear wheel and see what you gets. I'm just thrashing here, you may see if you've bent your gb mainshaft or is your drive chain rubbing for some reason. hobot may be right about your trans. There are plenty of bushings that can go easy and corkscrew the mainshaft. As I remember that's a 30 hp gearbox?

Dave
69S
 
No one would seal primary up with obvious chain drag and it can't really be too lose to hurt anything unless maybe the way I throttle and spin up and cut power so assume the worst. Wiggle clutch and kick over w/o chain to observe centered motion for idea of how lucky or not you are. Look at bottom of case for chain clash and also at top Alternator mount boss for link tracks and Al chips in oil puddles. Do put a dial gage on the crank shaft for sense of how hard to run it now.
 
hobot said:
No one would seal primary up with obvious chain drag and it can't really be too lose to hurt anything unless maybe the way I throttle and spin up and cut power so assume the worst. Wiggle clutch and kick over w/o chain to observe centered motion for idea of how lucky or not you are. Look at bottom of case for chain clash and also at top Alternator mount boss for link tracks and Al chips in oil puddles. Do put a dial gage on the crank shaft for sense of how hard to run it now.
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I put a dial indicator on the crank shaft and the most runout I measured was .0001 I tried a couple different times and that was what I came up with. I have the C/S sprocket off now so maybe I can get a dial indicator on the mainshaft?
 
I put a dial indicator on the crank shaft and the most runout I measured was .0001
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Yea man, lucked out with ~perfect lack of crank run out. Still leaves gear box guts to check or ride and find out. Hope the good news continues.
 
hobot said:
I put a dial indicator on the crank shaft and the most runout I measured was .0001
Click to expand...

Yea man, lucked out with ~perfect lack of crank run out. Still leaves gear box guts to check or ride and find out. Hope the good news continues.
Click to expand...

Thanks, me too! I measured the runout of the GB mainshaft after I removed the CS sprocket and the max was .0006 Maybe I did luck out. Getting ready to order some parts now.

Is there any trick to getting the mainshaft seal out of the gearbox or just be careful and try and pry it out?
 
Ok shafts check out great, so leaves bushes but if clutch stable then guess you got away this time. Just use a pick or screw into old seal to pry-pull out then grease or goop it then press in new one.
 
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