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V65 SP crankshaft bearings

D

Dodgindirt

Just got it firing!
Joined
Jan 23, 2019
Messages
2
Location
Canada
I am rebuilding a 1984 Moto Guzzi V65 SP (650 cc) and have run into an issue. My old bearing (both ends of the crank) have pliastiguaged at 3/1000 so I purchased new ones and they were no better. Where can I get new under sized bearings to get the reading within spec? What is the maximum tolerance for the bearings in this situation??? Can you run it with 3/1000 clearance with this Guzzi engine? Tolerance is under 2/1000.

Tim
 
Yes, there is an oversize main front & rear. It is .015mm oversize. It is for undersized cranks
Front o/s main P/N #GU19065668
Rear o/s main P/N #GU19066568
Have your crank ground to meet Minimum specs in Service Manual
 
 
Thank you very much. I was having no luck. I ordered these and will sort it out from there.....unless I have another question:). Cheers.
 
V7III engine manual states 0.08mm max clearance for front journal and 0.09mm for rear. Diameters are the same as V65 so if you're within these numbers you're fine.
What problems gives you bigger clearance?
 
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