KDXRIDER.NET

I just purchased a 2001 cr125 roller. The plan is for an "E" model hybrid.

I have already searched and read all the posts, but am still unclear on a

couple issues. I need to know what is a good pipe to start with.

I understand that I will have to do some altering-not a problem.

But the less altering , the better. My questions are:

#1. If I use a KDX pipe, I assume that an "H" model pipe would be a

better place to start?

#2. Does the "K" pipe header fit into an"E" exhaust port" I'm only

talking pipe to port junction.

#3. It has been mentioned by Karl, that a CR 250 pipe can be used,

but my impression is that a CR250 frame was used. Anyways I'm

wondering if this may still be a good way to go with my 125 frame?

Any ideas much appreciated.

I'd start with an H series pipe. And yes, it will fit in the cylinder.

#3. It has been mentioned by Karl, that a CR 250 pipe can be used,

but my impression is that a CR250 frame was used. Anyways I'm

wondering if this may still be a good way to go with my 125 frame?

Any ideas much appreciated.

Careful with that thought.
I used a '99 CR frame and a '96 CR250 pipe. I cut the snout off another KDX "H" pipe and welded it to the CR pipe so that it would fit the cylinder. I added some dents to the already banged up CR pipe and it worked really well for me.
I got lucky. What I ended up with was tuned by accident to work well with the KDX motor I had.

If I had to do it again I would start with a pipe made for the motor and make as few changes to it as possible.

Thanks for the reply.Looks like E-bay time