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May 8th, 2022
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Hello kids,
Does the shim cup on the crank fit into the left bearing with shims inside?
Thanks jerry
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Also is the shim cup included in the measurement?
jerry
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Joined: Aug 2001
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I would describe it more as fitting OVER the bearing than fitting IN the bearing.
If you have the shims that were in there, and they're in good shape, measure your endplay with the shim cup and shims in place. The rotor nut should be tightened when you do this. Look for .0015" to .003" end play.
If you don't have shims, or if yours are damaged, measure with just the shim cup and then figure what shims you need to bring the end play down to spec.
Mark Z
'65(lower)/'66(upper, wheels, front end, controls)/'67(seat, exhaust, fuel tank, headlamp)/'70(frame) A65 Bitsa.
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I would describe it more as fitting OVER the bearing than fitting IN the bearing.
If you have the shims that were in there, and they're in good shape, measure your endplay with the shim cup and shims in place. The rotor nut should be tightened when you do this. Look for .0015" to .003" end play.
If you don't have shims, or if yours are damaged, measure with just the shim cup and then figure what shims you need to bring the end play down to spec. We dont know the bike or the model year, or what bearing it has? If the bearing is a cylindrical roller type then this is true, but with a ball bearing you will eliminate all the play by tightening the rotor nut. A shim cup is not a necesity either, if you make a single piece shim out of the correct thickness shim steel then you can forget the shim cup.
Now let’s all have a beer  68’ A65 Lightning “clubman” 71’ A65 823 Thunderbolt (now rebuilt) 67’ D10 sportsman (undergoing restoration) 68’ D14 trials (undergoing transformation)
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Joined: Aug 2001
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Britbike forum member
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We dont know the bike or the model year, or what bearing it has?
If the bearing is a cylindrical roller type then this is true, but with a ball bearing you will eliminate all the play by tightening the rotor nut.
A shim cup is not a necesity either, if you make a single piece shim out of the correct thickness shim steel then you can forget the shim cup. Right, I was assuming a roller bearing. Agree about the shim cup, but note that without the cup, the shim(s) have to have a smaller i.d. so they can't slide out of place.
Mark Z
'65(lower)/'66(upper, wheels, front end, controls)/'67(seat, exhaust, fuel tank, headlamp)/'70(frame) A65 Bitsa.
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Sorry life happens
It is a 1967 500 Royal Star
Just line reamed on new bush to rollar bearing
.017 total endplay - looking for .002
problem is shim cup is .020 so cannot use it
We are tryin to track down a single shim of .015 1 3/16ID and 1 3/4
Have shims for the cup but ID too large to keep in place
Any one got one on the shelf they would share?
Thanks for any advice
jerry
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Joined: May 2013
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Buy some shim steel and cut to size.
Now let’s all have a beer 68’ A65 Lightning “clubman” 71’ A65 823 Thunderbolt (now rebuilt) 67’ D10 sportsman (undergoing restoration) 68’ D14 trials (undergoing transformation)
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