Crankshaft End Play

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Thanks for the replies! I spoke to Phil Radford and he suggested .007 float. I will see as I go forward.

Davo
 
davomoto said:
Thanks for the replies! I spoke to Phil Radford and he suggested .007 float. I will see as I go forward.

Davo
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Wow, .007 inch is tighter than I would ever go.
I use .010 as a minimum on a stock streetbike and .020 as minimum on a race engine. Jim
 
Sorry for the hijack but...
I have just measured the endplay on the 750's crank and it came out at .020" I have in my stash 3x .003 shims (smaller) for the inner race side of the crank (fitting super blends) I have the bearings fitted to the cases, but I also had an old set of SB inner races I have relieved so as to be able to slide them on and off the crank. I used these in conjunction with the new SB outer bearings to measure the end float without causing any wear to the crank surface.
Q1... Should I shim the crank with it at .020 ?
Q2 ...If so, is it safe to shim only on the crank on the timing side ?
Q3...If not, Should I wait another week till I can get some shim stock to shim the case side of the bearings ?
I have rebuilt several Commando engines in the past and never shimmed the crank. But now I'm spooked. lol
Cheers JUG
 
Not worth doing. Those very thin .003 shims can get digested sometimes.
 
jug said:
Sorry for the hijack but...
I have just measured the endplay on the 750's crank and it came out at .020" I have in my stash 3x .003 shims (smaller) for the inner race side of the crank (fitting super blends) I have the bearings fitted to the cases, but I also had an old set of SB inner races I have relieved so as to be able to slide them on and off the crank. I used these in conjunction with the new SB outer bearings to measure the end float without causing any wear to the crank surface.
Q1... Should I shim the crank with it at .020 ?
Q2 ...If so, is it safe to shim only on the crank on the timing side ?
Q3...If not, Should I wait another week till I can get some shim stock to shim the case side of the bearings ?
I have rebuilt several Commando engines in the past and never shimmed the crank. But now I'm spooked. lol
Cheers JUG
Click to expand...

Comnoz has already stated he aims for a MIN .010 for a stock road motor and a MIn .020 for a race motor. As he gave min (not max) figures, it would seem that .020 for a road motor would be fine.
 
Thanks guys, I had read comnoz's and all the other posts but just wanted some reassurance. lol
JUG
 
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