125-200cc Fbf 135

Any thoughts on the FBF 135 guys to go on a Wr 125
I know there are two members here that have had one - Scotty R and R Little
Would it give better low end than standard?
Would an 04 cylinder fit the 07 - 08 model?
Thanks

Well I guess little is known about these cylinders
I went ahead with getting one. It seems to be in very good condition
but I wouldnt really know refer pics - there is a slight line - stress mark ? on the bore
Its actually a 125 not a 135 as expected so I guess I may have to go to a 144 or 167

I will see how my current 125 piston fits up to it - is there a way of checking this - a measurement of tolerance? throw in a new ring and thinner base gasket and it should rock.
Id like to try it out as a 125 to see what the porting does to the power band up top

With the bore thickeness being quite thin at the inlet port ( pic 1 )
I wonder whether it can be taken to a 167 without lowering port too much. I have sent pic to George


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My 135 runs very good...just as good as my 144.

Maybe a little less bottom but more top end.

Get a straight 144 bore for $150..you already have the porting.

I bet the FBF 125 hauls also! I think the 2004 race team ran a PC pipe.

They were fast 125s. I remember

hmm
damn 135 piston just will not fit in there !