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1972 Roadster Rebuild

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Re: 1972 Roadster Rebuild

Postby gortnipper » Sun Dec 04, 2016 2:17 pm

If you can use some thin ply/mdf between the jaws of the grips and the dowels, that can help from munting them.
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Re: 1972 Roadster Rebuild

Postby pantah_good » Sun Dec 04, 2016 5:48 pm

Great advice, as usual, thank you both. Followed your instructions word for word, but being gentle wasn't getting it done, so I had to crank up the vice grips and that worked. Besides, Old Britts has new dowels in stock, although rather pricey(!!). The gasket surface did need sanding down as you suggested, just need to made an emery paper run to the hardware store tomorrow to finish it up.
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Re: 1972 Roadster Rebuild

Postby grandpaul » Sun Dec 04, 2016 6:52 pm

If you are working off any edges besides the repaired area, STOP IMMEDIATELY!!!!

You may have already filed off too much at the repaired area. It may need to be built back up again, then the repaired area brought back in line with the rest of the undisturbed body. If you start removing material unevenly, or on the non-repaired sections, you risk having a too-tight gearbox that will either not work, or possibly fail.
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Re: 1972 Roadster Rebuild

Postby pantah_good » Sun Dec 04, 2016 7:09 pm

I hear you, I've just dusted off some high spots with my one sheet of 600.
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Re: 1972 Roadster Rebuild

Postby pantah_good » Tue Dec 13, 2016 2:33 pm

PJ1 Fast Black engine paint curing on the wood stove.
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Re: 1972 Roadster Rebuild

Postby gortnipper » Tue Dec 13, 2016 3:15 pm

Mmm...pretty.
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Re: 1972 Roadster Rebuild

Postby pantah_good » Tue Jan 10, 2017 4:34 pm

Kind of slow progress on the gearbox reassembly lately, end of life care for my sweet old English Springer Spaniel girl.
I needed to sand down the lay shaft bearing diameter to slip fit it into the new superblend bearing inner race. I had no way to chuck the 11/16" shaft diameter in order to spin the shaft, so I used emery paper strips to run back and forth on and around the bearing diameter, like buffing a pair of shined shoes, to hopefully keep it reasonably round.
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Re: 1972 Roadster Rebuild

Postby pantah_good » Thu Jan 12, 2017 7:51 am

Speedi-Sleeve cam shaft repair.
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Re: 1972 Roadster Rebuild

Postby lcrken » Thu Jan 12, 2017 12:55 pm

I like that Speedi-Sleeve cam repair. I've only had one cam that I had to repair, and I sent it out to be ground, hard chromed, and final ground. That worked great, but the Speedi-Sleeve is probably a whole lot quicker and cheaper, and should work just as well. What size or part number seal did you use?

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Re: 1972 Roadster Rebuild

Postby pantah_good » Thu Jan 12, 2017 1:13 pm

Hi Ken, I can't take credit for doing that repair. Nick Woodbury at Classic Bike Experience saw to that. He is assembling the bottom end to the point of bolting the cases together for the last time. I meant to ask him for that info, but will now.
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Re: 1972 Roadster Rebuild

Postby pantah_good » Mon Jan 16, 2017 10:15 am

lcrken wrote: What size or part number seal did you use? Ken

Nick reports back that CHR 99062 is the part # from SKF.
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Re: 1972 Roadster Rebuild

Postby pantah_good » Mon Feb 27, 2017 5:01 pm

Gearbox rebuilding is going very slowly as I get parts and special tools in, and now I think I'm confused. I get .016" end play on the new kick start shaft, without the .020" gasket installed. Fred's (Old Britts) rebuild instructions suggest that a .010" shim is then called for if shooting for approx, .005" end play. But with the .020" gasket in place, I would think a .030" shim would then be correct. But Fred says to "SUBTRACT the thickness of the gasket from the amount you need to shim". Shouldn't that sentence read "ADD" .020" for the gasket?
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Re: 1972 Roadster Rebuild

Postby grandpaul » Mon Feb 27, 2017 7:14 pm

NO, Fred is correct.

You have gap "X".

You want to arrive at .010"

Subtract .020 of the gasket thickness from "X". (X - .020 = Y)

The remainder, "Y", is the thickness of shimming required.
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Re: 1972 Roadster Rebuild

Postby htown16 » Mon Feb 27, 2017 8:13 pm

If you are using an isolastic shim the inside diameter needs to be slightly enlarged. Otherwise the shim won't fit down on the kickstarter shaft which has a bit of radius at the base of the shaft. If not enlarged the shim won't seat correctly and will screw up the measurement. A sanding drum in a dremel tool will make quick work of enlarging the shims id.
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Re: 1972 Roadster Rebuild

Postby pantah_good » Mon Feb 27, 2017 8:56 pm

Fred says shoot for .005" end play. I have .016" (X) end play with a .020" gasket not installed. Are you saying 016 - .020 = -.004

I need a minus .004" shim? I'm still confused. Opening up the shim i.d. I understand.
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