wizzing sound?

[450robot]

well, im not sure if this sound has been there all the time, becuase i ride with my helmet on, but i was pulling it into my garage tonight, and while about 1/5 throttle in first gear i heard this wizzing sound on the oilfilter side, and in only seem to do that till 1/4 throttle, then it would disapear

also, this is the first quiet quad i have had, so i notice sounds from the motor more than before, and sometimes i also notice after i let off throttle after pinning it for a few second, when the motor starts to settle down in the rpms, it makes a wizzing sound

is this just natural motor noise (like the piston moving up and down, or pump gear or whatever) or is it something that might need adjusted or fixed?

[rowlrag]

Do you have a full belly skid on? If so you should put some rubber between the skid and frame to lessen or eliminate vibs.

[450robot]

no i just have the stocker plastic guard,

the sound seems to be near the side case on the oil filter side

could i just be the oilpump or drive?

[steveatv3]

thats just the sound of the turbo starting to spool

[Wonder Boy]

Is it your chain? Lubed it lately? Mine does that when it starts to get dry.

[brif]

Do you have a FCR carb? If so it's the accelerator pump.

[Extreem]

The sound comes from the chain roller right near the front sprocket. Drove me nuts for a while till I figured it out...

[dart450r]

another thing to check would be the counter balance shaft bearings...i had to put a new set in mine