Graves vs. Factory Pro Velocity Stacks

[nddowns]

So I'm looking at getting some velocity stacks for my 05 R1 and I'm wondering what people's preference is on brand. I've looked at a few brands and noticed that the Factory Pro stacks are all the same height, but Roth and Graves have two tall and two short. Does that make a difference? Are any of the brands better than the others? Will I notice different performance between brands?

The bike is stock now, other than flush mounts and levers, so this will be my first engine mod.

[drjak]

I'm curious to the price you are looking at for each. The Graves stacks for the current R1 are $970!!

[nddowns]

These are $149 and they fit my bike.

http://www.gravesport.com/Graves-Mot...Stack-Kit.html

From what I've read, the stacks on the new R1's are pretty complicated, not just a bolt on like the older bikes. That's probably why they're so expensive.

[pitbull9]

ive heard it will just give you better throttle response...but a particular brand dont think matters....

[Kangaroo]

I've had both Graves and Factory Pro. I like the Factory Pros better as it makes the engine smoother on acceleration.

[R1_Feeder]

Supposedly all tall stacks give you a little better low end (good for street) while half tall/half short stacks give you better mid-top end (good for track).

I have the factory pro stacks on my 06 and absolutely love them. Fantastic quality and they sound awesome, not to mention smooth out the throttle quite a bit. Also running a BMC filter though, which definitely influences that.

[Pipes1021]

id go with the roth stacks. helps a lil everywhere but there is def a increase on the mid and top. josh roth has charts that can prove the increase with his stacks

[Kangaroo]

Originally Posted by Pipes1021

id go with the roth stacks. helps a lil everywhere but there is def a increase on the mid and top. josh roth has charts that can prove the increase with his stacks

Josh hasn't proven squat, he claimed a 10 hp gain with just slipons. :

[oldMadBrit]

I went for Factory Pro's and love them.

I didnt like the idea of having 2 long and 2 short on a long term motor as this means 2 cylinders are always a little out of sinc from the other two.

[nddowns]

Well, the reason I was asking was because of this auction on ebay,

http://cgi.ebay.com/ebaymotors/ws/eB...#ht_500wt_1182

Wasn't really planning on spending anymore money on the bike for a couple months but that seemed like too good of a deal to pass up. But unfortunately I forgot to bid and the auction ended

I guess for now I wont be getting my stacks, unless I come across another deal like that one...

[Nine76Chris]

Originally Posted by oldMadBrit

I went for Factory Pro's and love them.

I didnt like the idea of having 2 long and 2 short on a long term motor as this means 2 cylinders are always a little out of sinc from the other two.

Cylinders 1 and 4 have different intake port shapes than 2 and 3 on the 04-06 motor. Maybe Graves knows something you don't.

[oldMadBrit]

Originally Posted by Nine76Chris

Cylinders 1 and 4 have different intake port shapes than 2 and 3 on the 04-06 motor. Maybe Graves knows something you don't.

Mines a 99 with identical ports but the Graves for the 99 has 1 & 3 differnet to 2 & 4. I understand the point of the set up and for a race bike motor its not an issue. However, both the 1,3/2.,4 and the 1,4/2,3 setups can and often will set up harmonics that were the motor was not designed for. So for a long term street bike I didnt want to take the risk - and with 130,000 hard miles on it - I may have a point.

[Dnas_tat2s]

130k on the motor rebuild it already lol