I went to put the camshaft sprocket on and it fell on measured it up and it was 10 thou under size on the shaft is there a fix or is it a throw away my engine recon man sent it away to be re profiled to different grind while he was doing all the block work I'm sure it was ok when I sent it there but honestly I can't remember .I do have a lathe if I need to do any machining

Is it a new sprocket? I saw a batch that had come in from overseas a few weeks back that had various dimensional errors. Thankfully the reseller sent them back...

It is unusual that a camshaft would be undersize where the sprocket fits on..

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.

Nah is the shaft 3 original sprockets tried, problem shaft measures about 22mm the cooper s one I measured about 22.22mm in I'll re- measure later and re-post

bum! was it the cam that came out of the engine?

the grinder may have cleaned it up?

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did I tell you that I won a trophy?

Yeah it was I just hope it never got swapped somewhere

go back to the grinder and explain...

I don't think it'd be a good idea to try to machine up an adapter/spacer - it may work, but I reckon you'd constantly be worried about it and every time there was a weird noise you'd think the pulley was falling off

it wouldn't be unusual for it to have been swapped - the original may have not had enough material to take the new grind or he might have had one already ground on the shelf

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did I tell you that I won a trophy?

Just measured it .864" cooper s one .874" I'm thinking it may need to be metal sprayed or thrown in the bin

I would ask the grinder first, sounds like he accidentally swapped you a dud cam for your good one...

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.