Cleaned carb - now it won't run?

1982 Honda Nighthawk 450
Cleaned the carb
Reassembled correctly
There's fuel in carbs
Air/fuel screw is turned the recommended 2 1/2 turns out
Turns over, but won't start
Any ideas?

You've got air, you've got fuel (supposedly).
Have you got spark to light it off?

A big vacuum leak would make it tough to start and idle (intake boot etc). Spray some starting ether in the intake and see if it will at least fire for a few seconds. That will tell you if it is a fuel or ignition problem.

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  • Cleaned carb - now bike won't start? I cleaned the carbs in my 1982 Honda Nighthawk 450 and now the bike won't start( though it will turnover). The red oil light also comes on while I'm not pressing the ignition.