Yamada
08-09-2013, 10:06 AM
Anyone ever tried to put on ytm-200 cylinder and piston on a ytm-225 bottom end. Tthe wrist pin is the same diameter so the piston will fit on the rod. I just don't know if the cylinder is taller on the 225 because of the added strokes. Also if the cylinder is not the same height, i'll have to check the piston wrist pin height. The engine will loose some cc of displacement because of the smaller bore, but I can get a 11:1 piston for the 200 and only a 10.25:1 for the 225. Will I get more power with the added compression of with the bigger bore engine?
----------------------200--------------225
Bore (mm)--------------67--------------70
Stroke (mm)------------55.7------------58
displacement------------196------------223
compression ratio---------8.5------------8.8
piston wrist pin diam.------16 mm--------16 mm
piston wrist pin lenght---2.0472 in.------2.2992 in.
cam chain (link)-----------104-----------104
base gasket-----------------same part number
head gasket---------------different part number ( use the one for the right bore cylinder)
engine head-----------------same part number
rod lenght-------------------?? -----------------??
----------------------200--------------225
Bore (mm)--------------67--------------70
Stroke (mm)------------55.7------------58
displacement------------196------------223
compression ratio---------8.5------------8.8
piston wrist pin diam.------16 mm--------16 mm
piston wrist pin lenght---2.0472 in.------2.2992 in.
cam chain (link)-----------104-----------104
base gasket-----------------same part number
head gasket---------------different part number ( use the one for the right bore cylinder)
engine head-----------------same part number
rod lenght-------------------?? -----------------??