My scooter has lost power when pulling away

Most 125cc scooters are restricted to between 60 and 70 mph often because of certain laws in each country they are sold in. These 'Twist and Go' automatics alway sound like they want to go faster but the transmission needs to rev that high to work properly.
It is possible to de-restrict your scooter but the top speed you would get would not be a lot higher, maybe 10 to 15 mph more.
Scooters also use much smaller wheels compared to a motorbike which makes the scooter less stable at higher speeds. Mine starts to shake and vibrate when it hits it's top speed of 70mph. To get much higher speeds you would need to spend a lot of money changing gearing ratios roller weights or even swapping complete transmissions. One option if you want to keep at the 125cc size is to change to a bike with a manual transmission like the bigger motorbikes. Some of these bikes can get closer to 100mph but most 125cc bikes and scooters all tend to max out at 70mph. At higher speeds the manuals don't sound like they are working as hard as a scooter does.

sounds like spline not seated in coupling recheck shaft connection into trans

Sounds like the carb. is to small.
Or you can try changing the main jet to a larger size first

There maybe an issue with fuel flow/delivery. Check the operation of the fuel tap and connecting hose. Has the fuel filter been serviced/replaced? Carburetor float level may not be set correctly, jets maybe dirty and blocked, these are all simple fixes if you are handy with some tools. Otherwise a relatively cheap fix by a dealer or more knowledge on the year/make/model of your scooter. Cheers.

you can have the battery tested for its voltage with an voltage meter and see if it is giving enough output for its purpose, but from the sounds of what you are saying it seems the battery isnt holding enough to power the scooter

Sounds like it is running too lean. Look for an air leak around the carburettor manifold.

Go to this website, www.goped.com they offer everything including manuals, but they will charge you for it, they have a really good selection of parts also.

If you are experiencing grinding noises and a power loss, I would look more to the power train and related components. Transmission, wheel bearing, brakes hanging.

With the engine off, I would push the bike slowly to determine if you are able to detect a grinding noise and if there is any resistence when pushing it.
Bill

My bike is a year old come the end of oct i started to ride from Jan of this year and my battery keeps going flat im on my 3rd battery now and am getting stressed out!!
Ive charged the battery but as it goes on the bike its like some one has pressed dump power and the power just goes but if i push start the bike and run it for a while it will hold the charge for a few min but it goes again after i power the bike down!
What could it be help
K@