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Steve, Motorcycle Mechanic
Category: Motorcycle
Satisfied Customers: 6993
Experience:  30+ yrs. experience, MMI, HD technician, HD early, engine rebuild/performance, bike builder, kit bike program manager, CCI 2001-2004
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Engine miss at crusing speed, fine on excelleration back

Customer Question

engine miss at crusing speed, fine on excelleration back fires a lot has aftermarket pipes on it pops and misses I think it needs to be rejetted 2003 heritage springer
Submitted: 2 years ago.
Category: Motorcycle
Expert:  Steve replied 2 years ago.
the "pops and misses" are symptoms of a LEAN MIS-FIRE.if the carb was not jetted after installing the pipes, this could be the cause of your problem.but you should also check for intake leaks. spray carb cleaner on the intake seal with the engine at idle. you will know right away if you have a leak. correct any leaks before doing anything else.let me know if you need more help.Steve
Customer: replied 2 years ago.
what jets need to be replaced??? they were never changed where would you start??? I checked for leaks and have none
Customer: replied 2 years ago.
it is mid range miss, it runs great at idle and full throt just mid range while at highway speed 55 or 60
Expert:  Steve replied 2 years ago.
what carb do you have?when did this start?tell me everything you can.Steve