kx250 motor swap in kx125?

A

andrew27

Member

Apr 26, 2007

3

0

• Feb 16, 2009

• #1

Is it possible to put an 02 kx250 motor into a kx125 same year?

If not how much modding am i lookin at?

 

holeshot

Crazy Russian

LIFETIME SPONSOR

Jan 25, 2000

1,823

0

• Feb 17, 2009

• #2

No...you can't without extensive modification

Although the frames look basically the same, the engine cradle is much different, so you won't just "plop" it right in. Anything is possible if you have enough talent, time and patience.

Have you ever actually looked at a KX125 and KX250 side by side?

Of course you haven't ...

 

A

andrew27

Member

Apr 26, 2007

3

0

• Feb 18, 2009

• Thread starter
• #3

no i havent looked at my 125 in years i blew the top end and that was the end of that im not gonna pay to take it in and im too lazy to fix it myself. so i got a new one

 

M

Matt90GT

Member

May 3, 2002

1,517

1

• Feb 18, 2009

• #4

If you did swap the motors, you will have an ill handling machine. The 250 motor would put to much weight forward.

 

gwcrim

~SPONSOR~

Oct 3, 2002

1,881

0

• Feb 19, 2009

• #5

HHHmmm...... It was my understanding that a 2002 KX250 and KX125 was an identical chassis. Of course, I've been wrong before.

Ya might ask the question at kxriders.com.

 

M

Matt90GT

Member

May 3, 2002

1,517

1

• Feb 19, 2009

• #6

one look and you can see the differences

 

J

julien_d

Member

Oct 28, 2008

1,788

0

• Feb 19, 2009

• #7

KX125 frame does beautifully with a KDX200 engine in there. I don't see why you couldn't manage a kx250 swap.

I want to pick up a kx125 at some point to put my kdx engine in.

 

M

Matt90GT

Member

May 3, 2002

1,517

1

• Feb 19, 2009

• #8

again go look at the 2 bikes side by side. Heck even go visit your yamaha showroom and look at a YZ125 and YZ250. Same thing there.