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dBDawg
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VBMWMO #8575
Joined: 01/18/2013
Posts: 53

So this is the best I could do in collecting lifters for my engine: 2 R11 series 5 and 2 earlier. Anyone see a problem with potentially using this configuration?

Also, anyone in the states know where to get these reground and to what spec? Thanks

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Ian R11
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VBMWMO #8148
Yorkshire uk
Joined: 10/22/2011
Posts: 199
I cant see the differing body

I cant see the differing body lengths having any undue effect.

Also cant help with recommending anyone your side of the pond for doing the work, but Huggett did tell me the hardened cam wearing surface on the bottom is around 2mm thick so can take a few regrinds. Its difficult to see the exact condition of the sides on yours, they can look worse than they are while still feeling smooth and a nice sliding fit in the bush. I doubt you can take anything from the sides as the walls seem pretty thin. I remember mine seeming a little pitted 34 years ago but they were smooth in the bushes, with regular new oil and keeping the bike in dry conditions they haven’t got any worse over the years.

The only other option I can think of is to fit the later type cam followers from the R12, available new. The later bush being thicker, and the cam follower being smaller diameter than the R11. They would fit in place of the R11 bronze bushes in the engine case. If anyone with an R12 in bits and access to these a photo would be nice and an external measure of the bush to confirm they would swap. Alternatively making a bush to allow use of the R12 cam followers within the R11 engine case would be relatively easy.

dBDawg
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VBMWMO #8575
Joined: 01/18/2013
Posts: 53
Hey Ian, I've actually

Hey Ian,

I've actually thought about using the R12 followers and I'm glad you at least suggested it. It would need custom bushings to fit but that's not a worry.

In the picture, one of the long lifters is in almost new condition though dinged on the sides of the body. I doubt it was ever used as it shows no signs of wear. Amazing condition and I picked off ebay a year or so ago. However, the others are badly pitted and the cam surfaces in rough shape. I am mainly trying to find info on what the shape of the cam surface is: does it have a crown or is it tapered, or is it just flat and perpendicular, etc.... Do you have any idea?

Ian R11
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VBMWMO #8148
Yorkshire uk
Joined: 10/22/2011
Posts: 199
I reground mine flat. They

I reground mine flat. They spin a little during each operation when turning the engine, so all seems good. The photo shows my original R11 and a new R17 cam, I only checked with a straight edge on the lobe but they both appeared to be ground flat.

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