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A65 rockers, fitting tip. #738248
06/10/18 1:40 pm
06/10/18 1:40 pm
Joined: Aug 2001
Posts: 3,869
argyll. scotland, uk
gavin eisler Online content OP
BritBike Forum member
gavin eisler  Online Content OP
BritBike Forum member
Joined: Aug 2001
Posts: 3,869
argyll. scotland, uk
One of my least favourite jobs is refitting the exhaust rockers after a head torque check.
Today I tried a new to me method, I fitted the timing side rocker and thackeray washers first, lined this up with the spindle so all was Concentric,
removed the spindle leaving TS assembly in position , then fitted drive side assembly , got it all lined up and the spindle popped through with no snags. Didnt drop anything. No cursing, easiest method I have tried.
Previously I fitted the DS first, then struggled to fit the TS as the DS washers would shift with all the finagling, maybe I just got lucky this time, will be doing this again soon, lets see if it works twice.


71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
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Re: A65 rockers, fitting tip. [Re: gavin eisler] #738327
06/11/18 5:12 am
06/11/18 5:12 am
Joined: Jan 2004
Posts: 3,700
ca, us
D
DMadigan Offline
BritBike Forum member
DMadigan  Offline
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D
Joined: Jan 2004
Posts: 3,700
ca, us
You might find it easier if you make up a dummy spindle slightly undersize with a champher on the end to centralize the rockers and washers. That will align everything except the last washer.

Re: A65 rockers, fitting tip. [Re: gavin eisler] #738391
06/11/18 5:20 pm
06/11/18 5:20 pm
Joined: Aug 2001
Posts: 3,869
argyll. scotland, uk
gavin eisler Online content OP
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gavin eisler  Online Content OP
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Joined: Aug 2001
Posts: 3,869
argyll. scotland, uk
thats a good idea, I think I am due one after 30 odd years of ownership/ messing around.


71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
Re: A65 rockers, fitting tip. [Re: gavin eisler] #738425
06/11/18 9:30 pm
06/11/18 9:30 pm
Joined: May 2018
Posts: 17
Louisiana
G
GeauxTwins Offline
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GeauxTwins  Offline
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G
Joined: May 2018
Posts: 17
Louisiana
I'm not familiar yet with the BSA set up but as DM's idea for my Triumphs I use an old spindle with all the champhers grinded smooth for aligning everything then I push in the spindle which pushes out the old one keeping everything in place.


Trophy 67, A65T 70, T100C 70, TR6R 71, Daytona 72
Re: A65 rockers, fitting tip. [Re: gavin eisler] #739012
06/17/18 9:46 pm
06/17/18 9:46 pm
Joined: Aug 2001
Posts: 3,869
argyll. scotland, uk
gavin eisler Online content OP
BritBike Forum member
gavin eisler  Online Content OP
BritBike Forum member
Joined: Aug 2001
Posts: 3,869
argyll. scotland, uk
Second time around my tip failed, dis placed the TS while fiddling with the DS, oh that it was as simple as a Triumph, the BSA wont permit displacing one spindle with another.
i did find that the wee fork for crab meat picking is ideal for chivvying the wee bits around.


71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
Re: A65 rockers, fitting tip. [Re: gavin eisler] #739024
06/18/18 12:23 am
06/18/18 12:23 am
Joined: Jan 2014
Posts: 3,780
Aus
N
NickL Offline
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NickL  Offline
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N
Joined: Jan 2014
Posts: 3,780
Aus
You'll find the assembly much easier with spacers as opposed to the thackery washers.
You've now got a lathe so away you go. you'll still need the thin thrusts at the centre but
make up the outer spacers from a bit of bar giving a few thou clearance it does make it
easier to assemble, the thackerys' always get tangled with the outer thrusts etc.




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