QT 50 By hopper80 (Read 808 times)

[hopper80]

I have a 50cc 1980 Yamaha yamahopper. This moped sat for a good 15+yrs, I cleaned everything tank, carb petcock, replaced all fluids etc. I got the thing to start, but sounded like crap. I was getting spark intermittently, sometimes spark sometimes not and just couldn't get the carb dialed in when it did run. Stopped running all together. I took the fly wheel cover and discovered the wheel part was sheared off the shaft. I dont know what caused this as the shaft itself turns true and strait. I was wondering if anyone has seen or heard of this before? Never really worked on a moped before so p!ease bear with me. Is this a matter of just replacing the part or could this possibly be welded? Some pics.

[hopper80]

[hopper80]

[cyborg]

Center drill the mounting flange bolts and get them out with an easy out,,,,I'd get a new " flywheel "

[hopper80]

Thanks for the response, will go with the replacement flywheel. I was just wondering if these are known to break like this and not part of a bigger problem. Can I just pull that base off with a puller? Can it be welded? Again thanks for the response.

[cyborg]

I'd pull it off And order a new one,,, it may have been out of balance from the factory or tossed a spot welded balance weight