Hi everyone,

I'm hoping that some of the experts can help!

I have an MH123 frame with a 200 engine fitted. The engine number starts with 29H. The only reference to 200 engines I can find is 29M.

1. Does anyone know what my 29H motor actually is?
   
2. I have a Cota 200 (not MH200) owners manual that states for Castrol TT (which I use) the ratio is 4% (25:1). I have seen posts on here that state 40:1, 50:1 and even 80:1. Does anyone know the definitive answer to the petrol/oil ratio? Mine does smoke a lot!!
   

Any help greatly appreciated.

Thank you

Ash

50:1 should be about right

50:1 FOR FUEL MIX

29H DENOTES MONT/HONDA 200 ENGINE - 64MM BORE

28H SHOULD BE 125CC - 54MM BORE

200CC TOP END WILL FIT ONTO 125CC

Thanks very much, 50:1 it is then.

Does anyone know the correct jetting for this? It has a Mark 2 Amal carb with standard airbox and filter.

Thanks