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Louie, Technician
Category: Motorcycle
Satisfied Customers: 12675
Experience:  25+ yrs. experience
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I have a 2005 Yamaha rhino 660 that is having issues running

Customer Question

I have a 2005 Yamaha rhino 660 that is having issues running above idle.
Submitted: 2 years ago.
Category: Motorcycle
Expert:  Louie replied 2 years ago.

Hi and welcome to JustAnswer,

Thank you for the question and your patience. Should you still need assistance for information purposes only...

Initially, proposed preliminary tries (if have not been done):
• check fuel quantity & quality both at the tank and at the carb bowl;

• carefully remove the sparkplug;
• check the burn color of the ceramic at the tip end;
• results would indicate:
- if black/sooty, then rich and/or vacuum leak issue;
- if oily, then an internal engine problem;
- if very light brown to whitish, then lean and/or an air leak concern;
• consider replacing the sparkplug(s) (even if new and just for purposes of eliminating as suspect(s);

• checks on the possibility of over/under-voltage, regulator/rectifier and/or stator issue - with a volt/multi-meter, determine the battery voltage when:
- ignition OFF and then when ON;
- when starting the engine;
- engine at idle;
- when attempting to run the engine above idle.

Please post back results / observations of the above once tried.