Every machine I have ever owned never needed oil between oil changes but this grizzly needs frequent oil level checks. I have found it low on oil several times. I thought it would get better after break in but no change. It seems to use a quart every 1000 miles. I now have 1800 miles on it. I know a oil check should be part of every pre check before every ride but have never had to add oil between changes on my other yamahas or hondas. I found it 3/4 quart low couldn't get a reading on the stick even with the stick screwed all the way in. It's not leaking just useing it. The tail pipe is a little sooty like a lot of you mention and the plug is clean. Is it just the nature of the beast or is something wrong?
Jerry

 

It should not burn oil, something is wrong.

 

Jerry,

I only have 140 miles on my 660 but I haven't noticed it using any oil. While I'm no mechanic, I wouldn't think that to be good. I would ask my dealer's service tech about this.

Keep me informed on what you find out...

SilverBear

 

might went to try running straight 30 weight oil. run her pretty hard, theres chance your rings never seated this would help. go to hoeshot.com topic on there from engine builders look for dale walker site.

 

this guy would have your answer one of the best. e-mail him with your problem.

dlwalker@holeshot.com good luck