Ok, so in about a year I want to increase the HP and torque of my 07 FXD, been finding that people chAnging pulleys, like the Andrews 30T, my question is what is the point of that and is that the final drive pulley or the front pulley, and what else could be done? I want to do as much as I can and then get a dyno tune. I have tried to look for other posts, but none satisfied my curiosity. Ok go thank you

 

whatever you gain at the bottom from pulleys you loose out of the top end power. Hence the saying:


There Is NO Replacement For Displacement.

 

I have never heard that before...so a good boring then?

 

The 30 tooth is the transmission, or front pulley. It's a small boost in low end torque, as you're only dropping down 2 teeth. If you really want a low end boost that will make your bike FEEL much faster, do the Andrews 30 and get a 70 tooth rear pulley. I honestly have hardly noticed the torque boost from the 30t. I mean, I'm sure it's there, but I didn't think "holy ****" after switching. And it wasn't exactly a simple replacement either.

But pulleys are a lot cheaper and mostly simpler than doing engine work. There is also a lot of evidence from people on this board that leaving the engine stock, with the exception of stage 1 upgrades, will lead to longer engine life. I'm sure some here will argue this point though. But there's no arguing that going beyond stage 1 is a lot more expensive than doing pulleys. And almost no street bike will miss the small amount of top end that you lose. Street bikes need bottom and mid range power, period.

 

I used a Baker 30 tooth pulley simply because I have a Baker trans, (also used the Harley Dyna international belt because my rear wheel was out to the end of adjustment). Already have the 120inch engine and so it was natural to wring out the final few drops of power at the rear wheel.

 

The gearing on the newer 6 speeds is just too high. Even after the 30T mod I still rarely cruise in 6th gear because the rpms are so low unless you go about 80 mph. This is why I did the 30T and why I have a 68T rear pulley ready to be installed, just helps to make the overall gearing logical.

 

Pulley's don't give you any more power than you already have, they just move it where you want it.

 

question...

so when you change a pulley you also have to change the belt right? or do you just adjust the back wheel forward or backward?

I might want to get a higher top speed & lower rpm's at highway speed, so what pulley should I buy?

a have a 2003 with 5 speed so I think it revs too high at interstate speeds.

 

It depends which bike and pulley combination we're talking about. On my FB, going from the stock 32 tooth trans pulley down to a 30, I could keep the stock belt and just move the axle back a little. Now I think if I go to a 70 tooth rear pulley, I would need a new belt. It all depends on the overall difference in teeth. I believe the stock belt can only be adjusted + or - 2 teeth.

I'm not sure what pulleys your bike comes with, but you would want a smaller rear.

 

Exactly what this guy said.

You can't gain power from pulleys and sprockets you can only move what you already have.

I have a evolution industries 30 tooth kit. Pretty much it's just a smaller tooth transmission sprocket at the front primary. I notice I go through my gears a lot quicker and my six gear is now more usable.

Here is the website check it out. It shows instructions with pictures.
http://www.evolution-industries.com/...30toothspr.pdf


Here's the gear ratios.
Raises RPM to achieve maximum performance eliminating lugging of motor
Changes stock 1.352 gear ratio to 1.5333 gear ratio
- 4th gear 70 MPH @ 3620 RPM to New 4th gear 70 MPH @ 4500 RPMs
- 5th gear 70 MPH @ 3042 RPM to New 5th gear 70 MPH @ about 3750 RPMs
- 6th gear 70 MPH @ 2570 RPM to New 6th gear 70 MPH @ about 3250 RPMs
Manufactured from aircraft quality steel
Heat-treated to specifications to insure maximum strength
2 lbs. lighter than stock