looking for more bottom end power

[elcamino12sec]

I have just purchased a 2005 kx250, previous bike was a 1995 kx250. My new bike as quite a bit less bottom end than the 1995. The 2005 is all stock but a fmf fatty pipe and shorty silencer. Besides a flywheel weight what can I do to achieve more bottom and midrange power. The bike abolutely rips up top. I was thinking about an aftermarket reed valve system, any thoughts? Is it normal for the older bikes to have a very noticable strong low and midrange power compared to the newer 250's?

 

[bruno670]

The fmf pipe is some of the problem. Most aftermarket pipe push the powerband towards the upper end. The fmf knarly pipe keeps the power down into the more usable power. Boyesen reeds can help some. Not sure on the others.

 

[RM_guy]

Carbon Tech lo-tension reeds work real good. They will affect some of the top end but you'll get a lot more low end.

If you want to spend some money, get it ported.

 

[MX86]

go with the gnarly

 

[a454elk]

My RM has a longer stroke thanks to PR2 engine works which gave me more bottom end. Porting will do great too like RM Dude says. ;)

 

[kawamaha]

I run a Gnarly on my 05 KX, I was really impressed with that pipe!

 

[mongial]

Gnarly or a Bills Pipe and Delta V-force power valves with some Eric Gorr porting

 

[elcamino12sec]

Hey Kawamaha, did the gnarley make a very noticable difference in adding more low end?

 

[kawamaha]

Hey Kawamaha, did the gnarley make a very noticable difference in adding more low end?

yes, it did! first I increased the length of the stock pipe, resulted in more low end but less top end. then - I never bolt on a aftermarket pipe before and just want to try this - I run the gnarly that have almost the same top end than the stock pipe but remarkable more low to mid