Who product motocross increased cylinders?

[Pammachio]

Hi,
I wish change the cylinder of my Honda 125 motocross with a increased displacement one, if exist it.
I know that Athena products it for Yamaha, with 150cc displacement but don't products for Honda 125 (while it products for CRF 250...).
Do you know who products it?
Are they very reliable?
How much cost they? How originals?
Thank you

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[bosozoku]

Is your CR125 a two-stroke?...if so, your choices may be nil, as most if not all current displacement-increasing kits for singles are made for four-stroke engines.

See if these guys can help you; they've been making engines bigger for a long time- Powroll

[m0t0-ryder]

Hi Pammachio.

Welcome to PAshnit.

I did a quick search and found LA Sleeve company---> HERE

I found they offer a 139cc big bore sleeve kit. --> HERE

This is for the 2005 - 2007 CR125R model.
It also requires a machine shop to perform the sleeve installation.
(adding to the cost)

I also found this complete cylinder & head 134cc big bore kit --> HERE
This one is for a 2000 - 2002 CR 125

Also found this company---> click here

Basically what I did was a Google search on "Honda CR big bore kits".

Good luck.

[Pammachio]

Thanks to all!
Best regards