Reverse and Horsepower question

[400exrapes]

Two questions
How much Horsepower will slip on hmf add and will i notice the difference?
Is there any type of aftermarket part i can buy to give my 01 400ex have reverse? thanks all

[honda300EXtreme]

cant think of the horsepower gains of hand, but you will definatley feel an awsomne difference,

and about reverse the answer is no unless you buy a newer engine

[400exdave]

don't slip on pipes usually gain between 2-4 horsepower? when full systems are like 7-8? thats what ive always read. i guess it depends on the pipe and quad obviousley.

[GPracer2500]

Don't even bother trying to generalize about "slip-ons do this", and "full systems do that". Each case should be considered individually. What holds true for one situation doesn't mean squat to another.

MobleDyno test of all stock vs. HMF slip-on, K&N, w/ airbox lid off:
HERE (http://www.exriders.com/vbb/showthread.php?s=&threadid=246519)

[RoadRage77]

if you dont mind " LOUD" go with the SPARKS x-6. That is if you plan on doing a lot of motor work. Carb, head porting n polish, cam, bla bla bla.... i have the x-6 on both my bikes and i love it. And the noise those pipes make when you have about 10 guys with x-6s is just crazy, sounds like the hellsangels pulling up.
As far as reverse goes, im pretty sure the newer 400's with reverse are not as fast. Anyways... who needs reverse.. grab the front brake, dump the clutch, and let the wheels fly

[bigballz400]

i got wht bros r 4 and love the power it creates....but i dont think they make them anymore

[400exrapes]

haha who ever said something about there pipes idk what you guys are talking about like yeah i love my pipe haha i already got my hmf on and its at the least as good as the rest and probably better i was just wondering howmuch horsepower i would get but i got it now and im pretty sure there is a reverse mod ive seen some older 400ex's with them but i never botherd to ask how maybe u guys are right though

[idro]

How does having reverse make something slower? o_O

[†2005 400ex†]

it doesnt, that is totally false