i have a 2000 scram 400 and i am putting a hpd pipe and silencer on and a k&n air filter and after i get it clutched and jetted i was wondering if it would have a higher top speed.

 

They run 70+ stock, you will go a little faster because rpm will increase slightly.

 

70+ isnt possible on a stock scrammy

 

they run in the 63 to 66 mph stock,
to run faster you'll need a clutch kit matched to your pipe and severals fields testing to get the correct gearing to fully load up the clutchs
together,the primary belt must climb to the very top that the first
sign of a correct gearing and helix angle change.
springs is up to you as for what response you want from it,but the weights
only depend how strong your engine is in the end.clearances and center to center distance must be at specs as well.

 

yeah because stock i was running 65mph and now i have a k&n air filter with hpd pipe silencer and clutching and jets, and im hoping to hit 70mph or do u think that is to big of a stretch. right now i ride with two groups one of sport ones like rap 660 and pred and the other group im the fastest ATP 500 500 artic cat and a four trax

 

Correct me if I'm wrong guys but if you really want more top speed I believe that you could just change the sprockets which would give you a different ratio but I am not sure of this.

 

just by changing to a faster gearing ratio doesn't mean you'll
go faster if the engine can't load the primary clutch to full shift already,i'm not bashing pre-determine clutch kit,but you must check
by yourself what happen in the clutch as far none of this motor
have the same power at the same time at the same speed depending
from various factor,just my 2 cents.

what do you have for clutching now?

 

right now for clutching i just have the stock one but im buying the hpd clutch kit for piped engines. not the aggressive clutch kit but just the one for slightly modded engines.

 

2000 scrammy is right,,,,

assuming you are on a 2x4 scrammy, and all you care about is top end, then you could just change the sprockets. bigger front and smaller rear sprocket, and youll go faster top end no problem.(cheap too)

X

 

the cheaper thing to do is to check mark your primary clutch to see
if the belt fully climb on top,if so you're got the right gearing and helix angle,going to a bigger front sprockets and smaller rear,
will achieve quicker reach to top end speed but doesn't mean the clutch will able to shift at the right ratio and giving more speed wise
at the end.
i only suggest you going to a 42-36 helix with stock weights for now
with a pipe or a 40-36 with a 020. shim.