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Hi... I recently bought a Honda CBF125 2013 Stunner ( https://en.wikipedia.org/wiki/Honda_CBF125) and want to upgrade the engine, I see a lot of offers in Aliexpress, and need your help to choose the best option-combination, I used this search tags in aliexpress: honda cbf125 big bore

For a modification to 125cc to 200cc there are these options:

1.-Cylinder Piston Ring Gasket Kit Big Bore 63.5mm for Honda CBF125: https://www.aliexpress.com/item/32970365104.html (they offer 200cc 197cm3, I think 65.5mm but didn't say about that).
2.- Modified Cylinder Head for Honda CBF125: https://www.aliexpress.com/item/4000206909312.html (CBF200)

There is another option for 125cc to 185cc:

1.- Cylinder Piston Ring Gasket Kit Big Bore 63.5mm for Honda CBF125: https://www.aliexpress.com/item/32972186149.html
2.- Modified Cylinder Head for Honda CBF125: https://www.aliexpress.com/item/32970537162.html

Some kits says that dont need a Modified Cylinder Head, but I dont know about that, maybe I can only use this cheap option and no more:

1.- Cylinder Piston Ring Gasket Kit Big Bore 63.5mm for Honda CBF125: https://www.aliexpress.com/item/4000054455974.html

Its a proyect only for fun.

Thanks!!.
 

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Hey, did you pull the trigger on this?

I've got what I think is a clone of a cb125f engine I'm looking to do the same with.

I've passed the big bike test so just want to turn the 125 into a play thing, with just a little oomph.

I think I need to pull the head on mine and fund out the bolt pattern.

Would you need to find the head gear (valves,cam etc) with them heads also?

As I know the standard valves are engineered small I suspect to keep some power down.

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A clone does not a Honda make. If you want a 200cc clone type engine they make those in China too, you can just buy one.
Arh but the MD02E hiding under the bench doth a honda make.

Bit that's part of a greater plan involving conversion to injection.

I'll get it to guts of it and have a measure and compare against some of the cb125f(glr) bits I've got.


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