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Wayne S.
Wayne S., Motorcycle Mechanic
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I have a 1947 replica knucklehead kit from v-twin. A Nightmare.

Resolved Question:

I have a 1947 replica knucklehead kit from v-twin. A Nightmare. 6 years and thousands of dollars later, I got it back from a shop who said they would have it all put together. I have put 66 miles on it since with all sort of problems that I have slowly fixed myself. Now I can not get the bike to start. I have gaped the points to .022, changed out and gaped the plugs to .028, checked the plug wires, made sure the flywheel and and point break arm lined up, used starting fluid, made sure the tranny was in neutral and now I am at a loss.
Submitted: 7 years ago.
Category: Motorcycle
Expert:  Wayne S. replied 7 years ago.

is there spark to both plugs?
Compression readings okay?
Tried carb cleaner or starting fluid,
did it fire at all?
Ignition timing was checked, okay?
Battery up, turning over well?

Edited by Druideck on 10/12/2009 at 8:32 PM EST
Customer: replied 7 years ago.
There is spark to both plugs and I used starting fluid. Last time I started it(three weeks ago), I used starting fluid and it started right up. I have not done anything since except haul it. I have not checked the compression. I kick it and it pops and smokes out of the carb. Battery is fully charged.
Expert:  Wayne S. replied 7 years ago.

Try some fresh spark plugs.
I would make sure compression is okay
Try the points at .018"-.020" gap
and then recheck the ignition timing.
It sounds like the timing is out possibly.
If it has a mechanical advance unit
on the points see if it is stuck.
Check for intake air leaks.
Carbs can gum up quickly when sitting too.
Wayne S. and other Motorcycle Specialists are ready to help you
Expert:  Wayne S. replied 7 years ago.
A compression check would likely have
indicated the tappet problem.

If you replace the tappet the push rod
should be readjusted with the piston
at top dead center on the compression
stroke. If it has solid
lifters the push rod must still spin by hand
when adjusted.
Customer: replied 7 years ago.
Thank you. I will give that a try.
Expert:  Wayne S. replied 7 years ago.
Hope you get it going soon. Luck!

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