Author Topic: New guy and A7 landspeed record build  (Read 6875 times)

Offline trevinoz

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Re: New guy and A7 landspeed record build
« Reply #45 on: 08.03. 2011 20:50 »
Dan,
            A65 has an imperial bearing on the drive side and A10 has metric.
Timing side is 1 1/2" which is larger than A10.
   Trev.

Offline dan daughenbaugh

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Re: New guy and A7 landspeed record build
« Reply #46 on: 08.03. 2011 22:35 »
Found it, it's about halfway down the page
http://bsa-a10.hailwood.com/a65conv.html
Had thought about pressing a bushing on there to make the size difference but i think it's going to be too thin.
50' BSA A7 Land speed racer
64' BSA A50C Scramble-ized
67' Triumph Bonnieville (stock)

Offline dan daughenbaugh

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Re: New guy and A7 landspeed record build
« Reply #47 on: 10.03. 2011 02:19 »
G'day Dan,
               All the A7/10 cranks have the same main bearings. The A65/50 is smaller on the drive side and I think larger on the timing side. I'm not 100% on the width but I thought they were the same. I have an A65 crank that I was playing with years ago and made a sleeve to go on the drive side to take the A7/10 bearing. That's as far as I got.
Cheers.
MUSKRAT
I did my measuring last night the inner bearing races are about .050 different in ID. That leaves a .025 spacer that would need to be made. I have my doubts about pressing soothing that thin on there. Looks like the only option is to weld and regrind. How did you do yours?
50' BSA A7 Land speed racer
64' BSA A50C Scramble-ized
67' Triumph Bonnieville (stock)

Offline muskrat

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Re: New guy and A7 landspeed record build
« Reply #48 on: 10.03. 2011 08:19 »
G'day Dan,
              I made a thick one, about 1mm wall thickness and the ID 2thou smaller than the shaft. Put shaft in freezer and heated the bush. it fell on then shrunk. Then put shaft in lathe and turned to size. I'd bet my house that it won't come off. Don't forget to chamfer the bush for the radius on the shaft.
Cheers
'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
Australia
Muskys Plunger A7