My four wheeler started to smoke slightly when you first started it, so I desided to change the oil (Castrol) now when I start it it smokes bad and continuously (never stops smoking).Also have carb. problems it acts like its starving for air, you can't run a breather on it and the idle screws make no difference. But it feels like it has more power then it ever had now that it smokes like it does?? Someone help me!!

 

What color is your smoke

Blue ?

or

Black ?

 

light blue

 

You are burning oil. Does it seem to have lost some power? I would do a compression test and maybe a cylinder leakdown test. Possibly bad rings?

 

Actually its got a lot better power since it started smoking? I dont know what it is.

 

Did you overfill the oil after the change? Hows the air box look? Is the breather spitting oil into the air box? How clean is the air filter?
How does the spark plug look?

 

Listen, I'm not ace mechanic by any stretch, but were this my machine, my first thought would be the valve stem seals. This happened to a Yamaha Grizzly I once owned. Initially it would smoke a bit when I started it after it had been setting a while. This got progressively worse to the point where there there'd be a cloud of smoke when I'd start it. If it only sat for 5 minutes or so I wouldn't see any smoke. It was explained to me that due to the valve stem seals be shot oil would leak into the cylinder so when I started it, it would burn off all that excess oil.

Moo,
WheelCow

 

Wheelcow,this sounds like my problem...I cant run a breather on it or it wont run for some reason?I put a new spark plug in it and it is already covered in oil,somethings bad wrong but it runs fine actually great just smokes bad.Thanks for your replys

 

Does it matter what type of oil you use, a guy I talked to said you need to use a real thin oil?Also he said you have to prime the oil pump??

 

my honda rancher es does the same damn thing but 4 and 5 gear is weak as **** is your like that