Change your CG250 67mm air cooled engine (167FMM)to 70mm bore,Kit include piston kit

**barnone** · 03-29-2011, 03:11 PM

Is "Change your CG250 67mm air cooled engine (167FMM)to 70mm bore,Kit include piston kit and gasket" kit available in China from say taobao.
I can't seem to get answers from http://www.chinese-parts-canada.com/...bore_kits.html

**MJH** · 03-31-2011, 12:22 PM

I think it is already a bored out CG125, the CG125 does not have a cam chain or cam bearing to wear out so and the internal part of Honda engine are in families so they share, the engine is a CG125 with what a piston from a CB550? CB750? I never bothered to get that into it. But because it is a OHV they pushed it way up in displacement the other engines like the 163FML is the same as the CMX200 not bored out. The OHC share more with the CB side of the Honda engine family like the CRF230 or FTR223. Not clones but closer to the original designs.

It may already have a CB550 cylinder in it? Because the CG125 is such a work horse it can be bored out, and many do it including the Chinese manufacturers.

**barnone** · 03-31-2011, 01:39 PM

MJH,
I'm asking for a 70mm kit( cylinder and piston) for my 67mm bore 167FMM from a Chinese source. I know this engine is based on a Honda CG125. The Canadian source doesn't seem to be available as all I get from them is an automated reply thanking me for my email.

How can I make this any clearer for you??????

**MJH** · 03-31-2011, 02:14 PM

http://www.chinese-parts-canada.com/...injection.html

**barnone** · 03-31-2011, 02:20 PM

MJH,
Thanks but that is the same company that just sends me automated responses.

**MJH** · 03-31-2011, 02:29 PM

It’s not really a CG125 it some sort of Chinese manifestation, the CG stroke is 50mm. It’s obvious looking at the engine it does not have much mass to it, boring it out would likely make the cylinder walls too thin. Likely overheat and loose compression. So why not attempt to change the induction first then leave that 70mm cylinder for a fix if it also overheats and burns up the rings. Which it will likely do anyway.