Join Date: Dec 2006
Location: Central Oregon
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Sled: 04 M1 900, 99 Bearcat 550 WT, 93 550 EXT
09-10 Mileage: not enuff
08-09 Mileage: 250 + torn ACL
07-08 Mileage: 400 and 1 blown knee
06-07 Mileage: 600+ and 1 blown driveshaft bearing
ATV: Santa Cruz Nomad Mt. Bike
check the rubber between cyl head and injectors, intake boot. if they're cracked/ not sealing,
that'll cause an air leak and we know thats not good.
you can try squirting some starting fluid around there while engine's running, it'll rev up if gets in via cracks.
rubber between airbox and injectors is just a dirty air issue more than performance issue.
btw the oil shouldn't be any issue.