125-200cc 165 owners, what sprocket sizes are you using?

Best Guy to convert it is Walt (wallybean) as he is the man that developed it, He will machine the head to suit our fuel, he also matches the power valves to what looks llike a slightly different angle. Prices are really good and spare pistons and rings are just a pm away.
If you do go for it when posting it send it as scrap or vitually worthless as the postage can be ruthlessly expensive.
Also to get the best out of the 165 a exhaust really helps but will run ok with a 125 item.
You can make the 165 into many types of power delivery with pipe changes you just have to decide on what suits you best, I like the more top end types but also love a good low end type for playing trials in my local riding spot.

this guys^ right stevie

Walt did it in America, the only one I know in the world who does these conversions. He is on here a lot. But I think what he did to my head has nothing to do with fuel, more to do with the fact that the head will be running a bigger bore.

Who is Maxpower? What do they know about Walt's 165 conversion?

Raced mine on 95.....no problem. I was never advised by Walt to be careful with fuel.

In England your blessed with better fuel conditions then in Asia, the composition of the fuel from the pump is for sure different here.

On top of that you have quite a few individuals that provide the service of selling fuel in a little shack near the road

to max their profit they do add questionable elements to the fuel to make the volume higher (its sold by the liter)

don't buy the fuel from them but on a trip to the middle of the nice riding spots there are no regular petrol stations and it might be the only option

after the head modification (lower compression) it is all fine

slightly little punch but an engine that is lasting under these conditions.

Robert-Jan