2 replies [Last post]
djg's picture
VBMWMO #8396
Joined: 10/30/2012
Posts: 10

I own a R60/5 Toaster. I was attempting to remove the nut holding the advance weights and broke the nut & shaft level with top of advance unit. Now what? It appears the shaft that sheared is part of the cam shaft? What are the options? It appears the cam must be removed and replaced or machined to accept a bolt to contain advance unit? Anybody been here and, if so, help........

Dennis Gavin



schrader7032's picture
VBMWMO #7032
San Antonio, TX
Joined: 10/27/2006
Posts: 7076
A machinist might be able to

A machinist might be able to drill and tap the end of the camshaft but it's a tricky thing. Your best bet is to convert to a Boyer ignition system...it doesn't use the mechanical advance unit like the original or like the Dyna III...it uses a computer advance curve. I suspect one of the newer ignition systems (Alpha, Omega, ??) that triggers off of the crankshaft could also be used.

Bottom of the page is stuff on aftermarket systems:


The Alpha is on this page:


More here:



Kurt in S.A.
'78 R100/7 '69 R69S '52 R25/2

sminn560sl's picture
VBMWMO #7977
Central Kentucky
Joined: 04/13/2011
Posts: 144
Kit available

There is a kit available that consists of a guide to allow you to drill the shaft and install a new oversize screw. I'll have to look for a source for you but I did it for a friend's bike a couple of years ago.

However, I do advise that you think about some of the crank-mounted electronic ignitions. They will solve the problem and give you a better ignition in the big scheme of things.


Steve in Kentucky
91 BMW K1 (caretaking); 87 BMW R80 (RS); 61 BMW R60/2; 66 BMW R27; 74 R90/6; 59 NSU Maxi; 71 Norton Commando; 71 BSA 250 GP; 66 Triumph TR6R; 61 Norton Manx; 59/61 Triton; 14 Triumph Thruxton

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