2mm overbore

[2smokers]

Im thinking about getting a 2mm over bore, .80 , on my 97 rm 125 to make it a 134cc. Now im just sending it to get it bored and replated, is there anything eles ill have to do. Wont the powervalves be too long and hit the piston.
Thanks :ride:

 

[2smokers]

anyone home?

 

[2smokers]

Has anyone bored out their rm125 here? Did you have you do any crankcase mods? :blah:

 

[robwbright]

If you're going to do it, why not go 144cc?

The 01-06 models need crankcase mods.

Check here:

http://www.eric-gorr.com/twostktech/bigbore_specs.htm

SUZUKI



1990-2000 RM150

FSB: 58.050

PISTON KIT: Wiseco #9203P5796

GASKET KIT: Cometic Stock kits each model year.

PORTING MODS: Match export valve pockets to outer edges, raise export to 28mm, turndown cyl. Base 1.25mm.

HEAD MODS: 58mm diameter, .5mm recess, squish 6mm @ 10 degree angle, blend 20 degree

VALVE MODS: Match

CRANKCASE MODS: Grind front side.



http://www.eric-gorr.com/services/cylrebuild.html

SUZUKI

2002-2005 RM85 (92-105cc) $400
1990-2005 RM125/150 (133-144cc) $475
1987-2005 RM/RMX250 (265cc) $500
(Minor crankcase mods required for piston clearance on overbores for RM85 and RM125s, send the whole engine and the mods are included in the prices listed above)