Messages

1

Vintage Two Strokes / 1982 RM 125Z exhaust and mods

« on: May 26, 2014, 12:42:36 PM »

Thanks for the tips and I'll try and search for the build up!!! What 34 carb, jetting and needle you are running ? I sent the cylinder out to a guy who knows 2 strokes pretty well to analyze and plug in some port timing numbers just for fun and right off the bat he saying transfer port volumes are too big but the heights looks good. This is mostly a fun project to tinker with and see what I can get out of it. Building them to me is just as fun as riding them.

2

Vintage Two Strokes / 1982 RM 125Z exhaust and mods

« on: May 25, 2014, 05:44:54 PM »

I'm building a 82 RM 125 to do some vintage racing and looking to get some more power out of it. I plan on some cylinder work, boyesen reeds and bringing the piston to head squish clearance down some since stock it is .080". I also have a 35mm PWK air striker I may try. This year head has the full hemi open design with no step and I'm not familiar with this design. As for the exhaust I'm only able to find DG available pipes, so the question is, is the DG pipe any good for these older RM's or just better to run the stock pipe ? Any do's and don'ts on engine modifications would be appreciated !!!!