Not really enough information to help. What kind of motorcycle, what engine? Is it a 4-cylinder or 6 cylinder? Does it have a carburetor for each cylinder? You have spark on one and two, but it won't run? Could have no spark, or you could have carburetors not giving you fuel.
Answers & Comments
Not really enough information to help. What kind of motorcycle, what engine? Is it a 4-cylinder or 6 cylinder? Does it have a carburetor for each cylinder? You have spark on one and two, but it won't run? Could have no spark, or you could have carburetors not giving you fuel.