john robert bould wrote:Ok this is not a Norton...my grandad allways spoke the truth!
But i am sure this is common to a commando..
I strobed my friends Bsa Rocket three yesterday ..becase the bike runs rough at tickover.
What i saw flashing up the snapon strobe ..confused me a bit...why do i see two marks approx 20 mm apart...surly i should see only one? Is the boyer dicky?
The rota as three lines 120 degrees apart its only a 1 inch window ..so impossible to see the other two when one appears.
I know the plugs all fire together ..but how on earth can i see two lines lit up 20mm apart?
dave M wrote:Some of the Lucas rotors have the timing marks scribed on a slightly raised section
john robert bould wrote:this two strobe "appearances" [two groves 20mm apart] is very odd, i am thinking the three poles in the boyer are not 120 degrees apart...? would this produce the double lines?
L.A.B. wrote:john robert bould wrote:this two strobe "appearances" [two groves 20mm apart] is very odd, i am thinking the three poles in the boyer are not 120 degrees apart...? would this produce the double lines?
I couldn't say for sure, although it seems rather unlikely unless the pickup plate was damaged perhaps, but I thought you would have checked something like that?
The only other 'Boyer' thing I can think of, is to check if the Boyer rotor is running out of true?
Or, perhaps the alternator rotor body is loose or is otherwise moving on the crank so the timing mark is constantly shifting about?
Did you use a separate power source for the strobe (assuming it's a 12V strobe)?
john robert bould wrote:I"m looking today at the issue, I have a inkling the magnet screws are rubbing on the back plate...touching the soldered "blobs" I guess this would cause some ill effect?
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