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Jeff Policky
Jeff Policky, Motorcycle Mechanic
Category: Motorcycle
Satisfied Customers: 2425
Experience:  Yamaha Gold, Suzuki Gold, Honda Bronze, Polaris Bronze, BRP
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Harley Davidson 1990 Evo will not start. Has spark good compression

Customer Question

Harley Davidson 1990 Evo will not start. Has spark good compression gas and air, put in new plugs and coil and ignition sensor tired 2 different modules. Made sure battery had good voltage and tested with load tester. What do you think.
Submitted: 1 year ago.
Category: Motorcycle
Expert:  P.J. replied 1 year ago.
A little (ok maybe a lot) more info may be helpful. Do you have the stock carburetor?Is the gas fresh?Have you tried starting fluid?Does it make any attempt to start?Have you made any recent changes or modifications?Do you have a compression gauge to know exactly what the compression is in each cylinder?How did you set the timing?Also, what is the voltage at the coil while the bike is cranking? You may have an air leak behind the carburetor or a timing issue. These are usually accompanied by a backfire or some signs of life. Thanks, P.J.