Join Date: Mar 2008
Location: Alaska - 63North, 162West
Your seals may be dry and cracked which might make the intake charging of the case difficult. It could also be a compression problem related to worn rings or cylinder walls. This, assumes that the carb - a single one is fine on the motor as long as it is correctly set up- is all clean and working properly. The fuel pump is another part to consider since an old pump may not be pumping as well as it should.
Formerly known as 63November, and before that as Golsovia.
Riding since 1983.
-Yamaha Enticer LTs
-99 Arctic Cat 550 Panther 14,000+ miles
-08 Ski-Doo 550 Backcountry
-340 eBay Edge from AK, and 10+ other states
-'11 AC T570 brand new...4000 miles