gary55
Well-Known Member
these are examples of a windowed piston that is required for a reed timed engine unless you use a 3 transfer jug.This is the engine kit i bought if it helps, (yes i know bikeberry sucks, but at the time i bought it, couldnt find a reasonable priced kit that wasnt junk). I had to replace some of the crappy bits, like the muffler, and paper thin gaskets. Does this one have the 38mm? Ive heard the 40mm was better. If so, is it possible to change it? Or would i need a new engine altogether to do this, assuming its worth it. Id much rather be able to change it since thia engine is nicely broken in already.
Edit: its not the flying horse, i dont know why the link says that, but it goes to the right place.BBR Tuning Racing Series Stage 4 66/80cc 2-Stroke Engine Kit
BBR Tuning and its Racing Series 2-stroke engine kits can turn any motorized bike into a race-day monster. Comes with install guide. Shop now!www.bikeberry.com
I was thinking of the windowed one, i assumed that meant ported, (never researched much into portig since if i do it wrong ive ruined my part) but i have seen people in porting videos cutting a bit off the bottom of the piston, but its been awhile, i forget what the reasoning behind it was. But on the subject of reed valve, would that be a worthwhile purchase? Or would it not work with my engine.
Probably, assuming thats what i mentioned above
Reed Valve Windowed Lower hole piston 15/16" 25m 80cc gas Motor ENGINE bicycle | eBay
Reed Valve Windowed Lower hole piston 15/16" 25m 80cc gas Motor ENGINE bicycle | eBay
this is a 3 port cyl.
View media item 60553This is a ramped piston
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The notch at the bottom intake side of the piston is for a longer intake duration and clearer path of flow. That is a skirted piston.
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