Increasing bottom end on '05 RM125

[eX_CRF250R]

My friend was wondering what has been a proven bottom end performance mod? He's been looking at pipes and silencer kits, any dyno charts?? What about drop a tooth or two on the rear sprocket?? That should make the bottom end come on stronger right? Thanks guys

 

[steve.emma]

i think you mean add a tooth to the rear sprocket. if you remove teeth you would get less acceleration but more top speed and vice versa.
a flywheel weight wouldn't give any more power but can help move the powerband down the rev range a bit and smooth it out some.

 

[eX_CRF250R]

My Roomie has been out of riding for a couple of years and I just switched over from the import car scene, so I'm used to lower gear ratios mean better acceleration lol. So adding weight would help him...Aighty i'll pass it on to him, thanx

 

[Chili]

The best mod we did for my son's 05 RM125 was to send the Cylinder to Eric Gorr and have it ported to help the bottom end pull.

 

[eX_CRF250R]

Oh really, how much did it cost??

 

[Chili]

http://ericgorr.com/services/porting.html

 

[eX_CRF250R]

Thanks for the link

 

[bike_rider250]

yeah definally porting and polishing will give you a big diverence in the bottom end, I got it done on my bike works wonders