Quote:
Originally Posted by congorilla
i think i have to check it personaly if its considered a 200... i had a small chat with a mechanic here and he says its a 200 engine with a 69 bore but a lowstroke engine... thats why it must be modded to achieve the engine full potential.. like find a higher stroke engine block and some crankshaft work but he says that it has a good engine... and a really torquey one... i had this motorcycle for almost 5 years no engine breakdown as of now...  |
I very much dount a 69mm piston (That with fully stroke crank is in a 250 with 232.6cc)
56.5 is 125cc 61ishs is 150cc add a taller crank stroke to 150 to get 175cc and add a bigger piston to taller crank to get a 200 (63mm maybe, I forget)
200 to 250 requires new cases as studs are spaced wider for the 65.5mm piston giving 223cc. 69mm piston giving 232.5cc, 71.5mm piston giving 249cc
The last 2 motors almost do not relate to the 125/150, then longer stroke/175/200/ needs cases to be 250 Also gearbox shaft from 125-200 might differ to the 250 (223cc)