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#710394 - 10/03/17 1:49 pm A65 crank thrust washer  
Joined: Apr 2002
Posts: 93
smitty Offline
BritBike Forum member
smitty  Offline
BritBike Forum member

Joined: Apr 2002
Posts: 93
cleveland,ohio
see all the good info from my thread on oil I figure I'd throw this out during disassembly I see this odd shaped plate with bronze(?) on it attached (?) to the right engine case by the crank shaft bearing,I removed this but have no idea what keeps that in place other than luck any ideas here,I'm getting ready to reassemble the bottom end and this is holding me back


68 BSA 650 streefighter
71 honda CT70H
72 triumph T25T (sold)
71 Ossa MAR (waiting for engine donor)
71(?) BritCHonda 230


if this was easy everyone would do it
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#710395 - 10/03/17 2:15 pm Re: A65 crank thrust washer [Re: smitty]  
Joined: Aug 2001
Posts: 3,291
gavin eisler Online content
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gavin eisler  Online Content
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Joined: Aug 2001
Posts: 3,291
argyll. scotland, uk
The thrust washer sits between two shoulders cast into the cases inner centre around the bearing OD. You can stick it in there with " Special No.8 Lucky cat grease" for re assembly, or regular stuff if you can do without the mojo. Once the crank is in place the thrust washer is trapped .


71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
#710407 - 10/03/17 3:53 pm Re: A65 crank thrust washer [Re: gavin eisler]  
Joined: Apr 2002
Posts: 93
smitty Offline
BritBike Forum member
smitty  Offline
BritBike Forum member

Joined: Apr 2002
Posts: 93
cleveland,ohio
thanks,no lucky cat grease but I do have a couple of lucky cats so I should be OK
just like to be sure as this engine has so many differences to anything I have built before


68 BSA 650 streefighter
71 honda CT70H
72 triumph T25T (sold)
71 Ossa MAR (waiting for engine donor)
71(?) BritCHonda 230


if this was easy everyone would do it
#710457 - 10/04/17 12:49 am Re: A65 crank thrust washer [Re: smitty]  
Joined: Aug 2001
Posts: 4,156
Mark Z Online content
BritBike Forum member
Mark Z  Online Content
BritBike Forum member

Joined: Aug 2001
Posts: 4,156
Owego, NY, USA
Smitty, if you were not aware of the thrust washer, I'm afraid you may not be aware of the procedure and specs for shimming the crank. If that's the case, bring it up and I'm sure you will get a tutorial, or a pointer to one. Otherwise, ignore this reply.


Mark Z

'65(lower)/'66(upper, wheels, front end, controls)/'67(seat, exhaust, fuel tank, headlamp)/'70(frame) A65 Bitsa.
#710727 - 10/06/17 8:53 pm Re: A65 crank thrust washer [Re: Mark Z]  
Joined: Apr 2002
Posts: 93
smitty Offline
BritBike Forum member
smitty  Offline
BritBike Forum member

Joined: Apr 2002
Posts: 93
cleveland,ohio
I have read about that and think I have a pretty good grip on it,that thrust washer/plate was something I had never saw in any engine before


68 BSA 650 streefighter
71 honda CT70H
72 triumph T25T (sold)
71 Ossa MAR (waiting for engine donor)
71(?) BritCHonda 230


if this was easy everyone would do it
#711349 - 10/12/17 7:36 pm Re: A65 crank thrust washer [Re: smitty]  
Joined: Mar 2006
Posts: 1,132
htown Online content
BritBike Forum member
htown  Online Content
BritBike Forum member

Joined: Mar 2006
Posts: 1,132
Magnolia, TX
My new clutch hub puller arrived and after waiting a week for it the hub was off in 30 seconds. Threw the old puller in the junk, some how its threads were cut wrong. Glad it didn't mess up the hub.
Measured the thrust washer on the timing side. It was .1165. With my measured play of .0150, to leave .004 clearance, I need a new thrust washer of .1275 and part # 42-3213 should do it.
The gear dogs show a fair bit of wear so I switched the layshaft 3rd with the mainshaft 2nd, which turns the dogs around. The gear teeth also show some pitting and by rights should be replaced but not this time around as bike will only see limited mileage. Main goal is to get it shifting well.
The camplate shows a lot of wear and there was apparently some rust and pitting in the track right where the turn into 3rd gear occurs. There is also wear in the slots where the shifter pawls fit. I'm replacing it with a NOS piece.
The plunger shows a lot of wear and will get replaced. Also a new spring.
The shifter pawls were replaced with repo's a few thousand miles ago along with the springs. But they are fairly worn. Will try to find a NOS pair the repo's must be soft metal.
Can the rollers on the shifting forks be replaced?
Need to send the parts order in.

Last edited by htown; 10/12/17 7:45 pm.

1978 Bonneville T140E
1974 Trident
1970 BSA Thunderbolt
1971 Norton Commando
1972 Norton Commando
2-1974 Norton Commandos
2004 XL 1200R Sportster

Everything will be alright in the end. If its not alright, its not the end.
#711359 - 10/12/17 8:30 pm Re: A65 crank thrust washer [Re: smitty]  
Joined: Aug 2001
Posts: 3,291
gavin eisler Online content
BritBike Forum member
gavin eisler  Online Content
BritBike Forum member

Joined: Aug 2001
Posts: 3,291
argyll. scotland, uk
Hi Htown, have you posted this in the wrong thread perhaps?
The thrust washer which controls lay shaft end float is the DRIVE side, leave the TS washer as is.
I have never replaced shift fork rollers, but I do recall somewhere / someone suggested that they were chain rollers re purposed, , I cant confirm this but it seems pretty likely., As to what size of chain, dunno, a quick measure up should do it.
I wouldnt worry to much about pitting on the gears, doesnt seem to do any real harm.

Last edited by gavin eisler; 10/12/17 8:34 pm.

71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
#711366 - 10/12/17 9:31 pm Re: A65 crank thrust washer [Re: smitty]  
Joined: Mar 2006
Posts: 1,132
htown Online content
BritBike Forum member
htown  Online Content
BritBike Forum member

Joined: Mar 2006
Posts: 1,132
Magnolia, TX
Senior moment there, I meant drive side.


1978 Bonneville T140E
1974 Trident
1970 BSA Thunderbolt
1971 Norton Commando
1972 Norton Commando
2-1974 Norton Commandos
2004 XL 1200R Sportster

Everything will be alright in the end. If its not alright, its not the end.

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