Problems with climbing hills.

[Nathan.v.allen78]

I have 2 50cc scooters and live in the mountains in VA. One is a 2008 ATM50-A the other in a 2012 CY50-A. Both Chinese bikes with the GY6 motor.
Most hills don't give either bike a problem. The ATM50-A will start slowing down going up steep hills hits about 10MPH then the motor sounds like the RPMS raise up and then pick up to 15MPH till I get to the top of the hill. On flat land the bike will do about 43MPH. The CY50-A will handle most of the hills at about 20MPH but there are a couple of hills when start climbing them I have to get off and walk the bike up them. The motor never makes the sound of the RPMS rising, RPMS just drop and bike quits moving. Never had this problem with the ATM50-A.

Both bikes
Spark Plug Autolite 4194
93 Octane Fuel with 1oz to a gallon of Turbo 108
Stock Carb
Stock Coil
Stock CDI

ATM50-A
New CVT Belt. Even with the stock belt I didn't have any problems.

Thank you all for any help.

[Nathan.v.allen78]

Also the CY50-A will go about 50MPH on flat land

[tortoise]

Remove variator weights and weigh them. Lighter weights, rollers or sliders, keep the CVT drive in "low range" longer. Only YOU can determine which configuration is optimal! Also replace wear slides.

[Nathan.v.allen78]

Thank you tortoise I will start on that tomorrow morning. I'll let you know how everything works out.

[tortoise]

Another consideration is that SOME of the TaoTao 50's are actually lean running 63's . . advisory . . related carb video.

CVT tuning video guidelines.

[Nathan.v.allen78]

Thank you again tortoise, I changed out the rollers and removed the cap from the air/fuel mixture screw and adjusted my carb. I can now climb hills at about max speed of 11mph when before it wasn't at all. I think I am going to order the High Performance CDI, Coil and Cone Air Filter and put them on and see if it makes much difference.
Thank you again tortoise for your help.

[maddog]

sounds like a worthless 4 stroke engine, just spent 2 weeks on vacation working on a piaggio 150, did what i had to do then walked away from that piece of total crap.

[tortoise]

spent 2 weeks on vacation working on a piaggio 150, did what i had to do then walked away from that piece of total crap

What were the deficiencies?

Before crashing, this cross-country rider experienced some issues with the front wheel bearings and starter on a Piaggio Fly 150 . . which does NOT have a kick-start lever.

[wardie]

I have a nice red Vespa LX 150 2007 for sale $2195.00 Wardie

[maddog]

If your scoots happen to be 2 strokes i suggest a polini contessa 70cc bore kit, a cdi will do nothing for hills.