I am a puch owner but not of the moped variety, I am doing a bit of a modern anachronistic race version of a 1950s puch 175cc and am thinking I should try a modern carb on it to see how it improves power throttle resonse etc, im sorry to invade your forum but you guys really know your tuning stuff, i've been reading on here for ages, wish mopeds were legal in aus, I have 2x e50 engines in my shed lol!
I am looking at either a mikuni flatslide 24mm or 28mm, but have seen random posts of people saying the needle jets an whatever else are set up for 4 strokes (175) and I need a 169? Where can I get one?. I know I will have to tune to find the right main jet which is no drama
has anyone run a flatslide on a piston port motor? what setup did they use?
the 175 bike has a 30mm inlet so its probably well suited to the 24mm mikuni, plus its top rpm is around 7-8k max (long stroke, split single design) so I cant see myself needing the benefit of a massive carb. The stock Fischer 22mm is a roundslide.
once I get the crankshaft from austria (2 month lead time and $400) ill be making up some chambers for it...
dont know if its relevant, but
- intake exterior to piston face 60mm
- intake duration 140 deg
thanks in advance!