Increasing bottom end on '05 RM125

E

eX_CRF250R

Member

Aug 25, 2005

6

0

• Sep 26, 2005

• #1

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

 

S

steve.emma

Member

Oct 21, 2002

285

0

• Sep 26, 2005

• #2

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.

 

E

eX_CRF250R

Member

Aug 25, 2005

6

0

• Sep 26, 2005

• Thread starter
• #3

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

 

C

Chili

Lifetime Sponsor - Photog Moderator

Apr 9, 2002

8,062

17

• Sep 26, 2005

• #4

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.

 

E

eX_CRF250R

Member

Aug 25, 2005

6

0

• Sep 28, 2005

• Thread starter
• #5

Oh really, how much did it cost??

 

C

Chili

Lifetime Sponsor - Photog Moderator

Apr 9, 2002

8,062

17

• Sep 29, 2005

• #6

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

 

E

eX_CRF250R

Member

Aug 25, 2005

6

0

• Sep 29, 2005

• Thread starter
• #7

Thanks for the link

 

B

bike_rider250

Member

May 6, 2005

127

0

• Sep 29, 2005

• #8

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