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British Bikes / BSA PROBLEMS CAN ANYONE HELP?
« on: July 28, 2007, 01:55:02 PM »
I just finished having my 1956 BSA C12 restored and shes a BEAUT!
The machine is running EXCELLENT and has TONS of power but I seem to have a somewhat big problem that MIGHT be easy to fix but I dont know what exacly the problem is.
1) I changed the electrical system so the bike does NOT run off of a battery, it runs off whats called a "CDI" which is what all new bikes use....
The problem is, after about 5 minutes of use when the engine is nice and hot, it starts to MADLY back fire, I mean it sounds like repeated gun fire, bam, bam bam bammmm, bam bam!
And when this happens I cant even use the bike anymore, basicaly need to walk it home (a real drag)...
I tryed riding it again last night but this time had a friend follow behind me, when it started back firing flames were shooting out the exhaust pipe!
Another thing is I currently use a VESPA spark plug (I dont know what else to use)....
Do you have any ideas?
Is the bike too powerful to use a CDI?
Could this simply just be the wrong type of "spark plug" I am using (spacing etc)?
Or is this a bigger problem?
I really appreciate your advise and help, I have no idea who or where else to ask about this...
Thank you for your time and efforts.
Respectfully,
Matthew
The machine is running EXCELLENT and has TONS of power but I seem to have a somewhat big problem that MIGHT be easy to fix but I dont know what exacly the problem is.
1) I changed the electrical system so the bike does NOT run off of a battery, it runs off whats called a "CDI" which is what all new bikes use....
The problem is, after about 5 minutes of use when the engine is nice and hot, it starts to MADLY back fire, I mean it sounds like repeated gun fire, bam, bam bam bammmm, bam bam!
And when this happens I cant even use the bike anymore, basicaly need to walk it home (a real drag)...
I tryed riding it again last night but this time had a friend follow behind me, when it started back firing flames were shooting out the exhaust pipe!
Another thing is I currently use a VESPA spark plug (I dont know what else to use)....
Do you have any ideas?
Is the bike too powerful to use a CDI?
Could this simply just be the wrong type of "spark plug" I am using (spacing etc)?
Or is this a bigger problem?
I really appreciate your advise and help, I have no idea who or where else to ask about this...
Thank you for your time and efforts.
Respectfully,
Matthew