CG125 to 150

[stuartadair]

Hello all


https://www.ebay.co.uk/itm/Big-Bore-kit-150cc-Chinese-125cc-CG125-copies-Motorcycle-New-/160683967651?pt=UK_Motorcycle_Parts&hash=item256982c4a3

I've fitted a 150 barrel onto a Chinese 125 before without any issues, including fitting to the twin-port head version that the listing says that this barrel doesnt fit.
Does anyone know why these 125-150 barrels wont fit a CG125 ?
Stu

[pepperami]

Is`nt it something to do with the crankcase slot is not big enough for the new barrel liner.
I seem to remember someone on here saying that it can be machined out to fit??? (the cases, not the barrel).
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I am the sum total of my own existence, what went before makes me who I am now!

[humanbeing]

There's some "direct fit" kit that available from China. https://item.taobao.com/item.htm?id=12959476654 (Can choose silver / grey / black) .Buy via "agents" still saves some £.
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Machined in primitive way. That links shows some Chinese bike are as OLD Honda's O.D.

[Nope.]

Just from a quick search:

https://www.bikechatforums.com/viewtopic.php?t=205654

https://www.bikechatforums.com/viewtopic.php?t=231057

https://www.bikechatforums.com/viewtopic.php?t=180847
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Former: Derbi GP1 50, Sachs XTC 125, Suzuki GSXR 400 GK73A, Kawasaki ZX7R, Suzuki DR250, Yamaha RD350
Current: 2011 Yamaha XT660Z Ténéré, 2003 Yamaha YZR-R1 5PW (In Build), 2009 Kawasaki ZZR1400

[stuartadair]

Many thanks for the replies. Dont fancy milling out the crank case, maybe keep my eye open for a cheap Chinese 125 and whack a 150 kit on that.