Depends how cold. I ride my scooter through the winter and if it's below -3C (28F) I spray some starting fluid on the filter and use a kick start. Also, the air/fuel mixture for starting is different from summer and winter.
Some states like NY don't have inspection on 50cc. They are registered as limited use and are not supposed to go over 30MPH. I would put big bore kit in and with that open the intake a little and re-jet the carb.Should gain ~10-15 MPH, no mods to muffler needed.
I got mine from ebay. It was listed as for small motorcycle, and it covers my scooter with windshield and trunk box. It is a bit small for my Honda Rebel which also has a windshield and trunk box. Super easy to throw it on and it hooks/connects on the bottom. I think it was about $30, 2 color general cover.
My concern is fuel gauge... check your ignition switch in that case. Something is off I guess. In that case, ignore everything above. Also, check your on/off switch. It actually may have 3 positions. Mine, even though marked as on/off only, had 3 positions. One was blocked by a spring inside that I discovered when I took it apart.I mention and show the switch in this video
On your hand brakes (on both sides) you have two tiny safety switches. They fail sometimes. Most people apply left brake and then start the engine. Try squeezing the right brake and start with the button. If starter works, your left brake safety switch is broken, most likely stuck. Try to find it and clean it. happened to me once, took a while to figure out. If I remember correctly, the left side should push out, the right switch you push in when you squeeze the brake lever.
I rebuilt mine 3 times, and only once had a compression loss after 1000km. Wouldn't start anymore. Redid the work and no issues. My scooter has 12'000 km as of now. Also an 80cc rider
First I did the 80cc conversion that lasted for 10'000km. Then a piston rod bearing failure, metal fragments from bearing ate everything inside. Rebuilt, then 1000km compression loss. Rebuilt again with new kit and now no issues. The kits can be faulty as well. Or, we can always make a mistake.
Last Edit: Aug 5, 2019 21:01:02 GMT -6 by tommikene
Start with compression (especially after big bore work). If you don't have compression tester, you can get an idea by just trying using kick-start. If you can rotate the engine effortlessly (without noticeable resistance) then either get the tester and exact reading for your peace of mind, or consider it a compression loss. Something went wrong in your conversion