99 yz 125 performance

M

mayhew ian

Member

Jan 21, 2002

31

0

• Jan 30, 2002

• #1

Hey

I have a 99 yz 125 with a fatty pipe and I am going to buy an fmf shorty pipe and I want to if I should change my rear chain wheel to 50 instead of a 48 to get some more horsepower. If you have any other suggestion please tell me I don’t want to spend more than $500
:eek:

 

Jaybird

Apprentice Goon

LIFETIME SPONSOR

Mar 16, 2001

6,449

0

Charlestown, IN

• Jan 31, 2002

• #2

Best money spent on that bike would be on the crank. Look into crank stuffers.

I love the power usage of the '99 yz.

 

MikeT

~SPONSOR~

Jan 17, 2001

4,095

11

• Feb 1, 2002

• #3

Stuffers?? What's that??:think

 

Jaybird

Apprentice Goon

LIFETIME SPONSOR

Mar 16, 2001

6,449

0

Charlestown, IN

• Feb 1, 2002

• #4

Mike,
On '96 and up Yz 125's the crank has a platic insert. This insert is crap. When the crank heats up, they melt. The stuffers allow you to rebuild the crank without paying for the whole unit. Yamaha does not sell crank parts, only full assemblies.
Check out "Crank Stuffers" here.