Just wanted to know if underdrive pulleys made an improvement on HP and how hard they are to install.

 

Are you referring to the Crank pulley? Pepz change their pulley for a lighter one.. from few pounds to few ounce, won’t increase your hp, but would ease on motor rotation so its’ respond a little better. If this is what u looking for, get a lighten fly wheel too, just something to start with. Installation is not that hard.. but would def. need some power tool to remove the crank bolt.

 

Well, Is this your only way to make power at this point? If not, id sink money into something else.

 

emmmm...i have heard a couple rumors not to combine lightened flywheel with underdrive crank pulley. Cant remember reason. Anyone else heard this, know reason?

 

balance of the rotating assy gets thrown off...if you have a harmonic balancer crank pulley - leave it alone.

 

ok im gonna lay it down for you. I just got ride of my megan racing crank pulley. I had to use a 5 foot breaker bar with a chain wrench to get the bolt out. i didnt feel one bit of a difference in reving or power. DONT WASTE YOUR MONEY