my buddy has i think its called the kfx? 700 and when we ride it has a whistle to it? is that normal or what so you like it is its like a whisle dash wine sound

 

Is it a whistle or a high pitched whine sound ?

 

Well if you mean whine, its the belt

 

Its not the belt, its actually the transmission. The gears on most quads are rounded. The gears on the kawi are square, they make the noise.

Its perfectly normal.

 

Actually all tranny gears have an involute tooth profile to minimize wear. Whether the tooth path is straight or helical is a different story.

When gears have teeth that don't run straight across the gear from one side to the other but have a helical path, they make much less noise. They are more expensive, heavier, waste more energy and generally require the tranmission to handle increased loads.

For some reason the Prairie gears are straight. You can see them in the 02 650 repair manual on P9-13. It doesn't make them inferior in any way except for noise.

The rearend is helical. You can't hear them unless they are worn out.

Most manual transmissions in cars have helical gears. You can't hear them. Some manual transmission cars have straight cut reverse gears, you can hear them moan as they back up.