my buddy has a 2001 400 scrambler with hot seat performance clutch kit pipe and muffler with a k=n and boyesen reeds and has the cylinder ported and polished and some mod to the head i cant remember and he is wanting to know how it would run in a dragrace against a stock raptor.

 

The Hot Seat pipe has a low end bog. Should've bought the V-force reeds instead of the boyesons (dyno results prove this) Tell him to try it and see. Hot Seat has some nice suspension mods, but for engines, go with HPD.

KT

 

ok my raptor has trinity stage 5 header,full exhaust and the hting probably hits about 80 along wit the k&n and some more stuff i did for about 3,000

 

Grizzdude660,

For just under $3000 you can have a complete full race motor, shipped to you from HPD. All you have to do is to add a pipe, clutch kit and carb. Guarenteed to produce over 70+ horsepower. Not to mention that you still have the stock motor to put back in it any time you want to. Plus with the money you save from not buying the Raptor, you could add tires and a decent suspension to it.

I'm not trying to take anything away from the Raptor, it's a fairly good quad, but it still has too many bugs for my taste.

 

i did aprox 1300.00 worth of mods to my rator.they were a cam,complete exhuast,12-1 piston,head porting,plus a bunch of other perf. goodies,the motor kit is said to be good for58-60 rear wheel hp.my motor probabley makes 70-75hp but unlike a polaris you dont loose a large amount through the cvt trans.my riding buddy has a big bore scram with all the modds,in a hundred yards i beat him by over 5-6 lengths.when my raptor was stock i still beat him by minimum of three lengths.

 

Hey Grizzdude660~
My bone stock DS 650 will hit 75. Is that 5 mph advantage really worth $3000? I bet I could buy a 30 dollar sprocket and be close to 78 mph![img]i/expressions/face-icon-small-tongue.gif[/img] Sure, you would get there faster, but you never said you're interested in acceleration. So for about 1% of the cost, I have almost the same top speed! Sorry to burst your bubble, but once again [img]i/expressions/face-icon-small-tongue.gif[/img] I'm a little confused...is it the K&N filter or the other $3000 in mods that let you go 80?[img]i/expressions/face-icon-small-confused.gif[/img]

 

derbyking,

When it comes to horsepower and Polaris motors, bigger is not always better. The old four stroke adage of "there is no replacement for displacement" doesn't mean much when you are talknig about CVTs and Polaris two strokes. When you increase the size of the bore on the Polaris 400s you also lower the ports. If you lower the ports on a two stroke, you gain low end power, but lose top end. So it isn't surprising that he lost to you. In other words, you can get more ponies from a properly ported stock bore motor, than you can with a big bore.

Sure, on a stock CVT machine you will lose some horsepower (more so than on a gear driven machine), but with proper clutch tuning and a roller clutch, the loss is kept to a minimum. Plus the fact that the CVT equipped machines can shift faster and keep the engine in the meat of the powerband better than most pro riders can.

I'm not really sure I would want to add 10-15 extra horsepower to a machine that has been known to grenade it's transmission on a stock motor. It sounds to me like the old Molly Hatchet song "Flirtin' With Disaster".