2000 Yamaha 1200 SUV

jcmartin606

Cadet
Joined
Dec 20, 2009
Messages
8
my Yamaha's running really rough I check the spark plugs and they were black so Im going to replace those but is there anything else I need to check that might smooth out the idol? the jet skis running at almost 50 miles an hour which is good. compression is 120 PSI on all three cylinders.
 
Top