Trying 6 speed morini engine?or KTM??
- Thread starter robin
- Start date
SpeedWizzard
New Member
Not to dig up an old thread but did you ever end up trying it?
SpeedWizzard
New Member
true at 1500 they are a touch pricey. I've already started saving 
SpeedWizzard
New Member
I've looked that way, but they are all too long and have to be horizontally mounted which is extremely hard in a bicycle frame. plus the two strokes generally much lighter. Might look into the KX65 though, can be bored out to 80cc and are cheaper.
robin
Member
No i sold the bike this spring to Bofab as i was getting too scared on it
like this one? http://www.ebay.com/itm/2009-Kawasa...4149&pt=Motorcycles_Parts_Accessories&vxp=mtr thats a little beast also
mdlee1958
Member
I've been running the Yamaha YSR50 engine now for just under a year (Nov'11') and have just a hair over 2000mi on it. It is mounted on a 1964 Schwinn "Racer" frame and have absolutely no problems with fit, vibration, or frame stress. The engine/transmission weighs just a little under 40lb (38) and balances out well for handling. Currently on Ebay there are three YSR50 engines for sale at around $250.
16v4nrbrgr
Active Member
Thank you for the great idea mdlee1958, I'll keep an eye out for one of those motors. The YSR was pretty popular around here so CL usually has a few or parts. Team Calamari Racing makes a bunch of stuff for the YSR engine.
Of course the bicycle with a geared engine is technically a motor driven cycle and needs a motorcycle registration, at least in CA. I wonder if this also applies to running engine power through a derailleur or geared hub, as it could be argued that those were on a bike before motorization.
Internal gears are way stronger than a derailleur or geared hub setup, it would be nice to not worry about all the complication of shift kits and extra chains or bike hubs that might not hold up.
It sucks that if you want to be 100% compliant its difficult and expensive to have a multi-speed transmission. I wonder if semi-automatic transmissions still count as automatics under CA state law, that's how they are classified in other types of vehicle, why not in bikes? The ATV style semis in Yamaha PW80's or similar style engines might fit a legal loophole niche for motorized bikes that need good hill climbing without all the external complications.
Of course the bicycle with a geared engine is technically a motor driven cycle and needs a motorcycle registration, at least in CA. I wonder if this also applies to running engine power through a derailleur or geared hub, as it could be argued that those were on a bike before motorization.
Internal gears are way stronger than a derailleur or geared hub setup, it would be nice to not worry about all the complication of shift kits and extra chains or bike hubs that might not hold up.
It sucks that if you want to be 100% compliant its difficult and expensive to have a multi-speed transmission. I wonder if semi-automatic transmissions still count as automatics under CA state law, that's how they are classified in other types of vehicle, why not in bikes? The ATV style semis in Yamaha PW80's or similar style engines might fit a legal loophole niche for motorized bikes that need good hill climbing without all the external complications.