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79 Yamaha RX 125 discussion forum:
|13Phoenix said 2012-03-13 05:09|
hello out there in yamaha flavoured cybberspace,
does anyone have porting details for 79 rx125?
exhaust port size (mm)
exhaust open (degrees)
main transfer port open (degrees)
secondary transfer port open (if applicable)
rear boost port open (degrees)
exhaust port + gasket length (mm)
i\\\īve downloaded expansion chamber design software, and can pull apart and measure, but would be easier if the data is out there.
2 Stroke Wizard 4.
btw have recently installed MotoTassinari Vforce 3 reed valves. the V384A fits with a bit of drilling on the bolt holes. carbon fibre petals, definite improvement, plus the peace of mind that when fatigue finally happens, you don\\\īt get metal falling into the works.
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