Modern Vespa

Hi everyone,

This is my first post on here (or on any forum as a matter of fact). But, I have recently purchased a used 2009 mp3 400 ie with very low miles (3900).
When I found, and purchased it the bike had been sitting for an extended period of time. For how long, I do not know.
I replaced the battery and found out it then needed a fuel pump. After the fuel pump installation, I was excited to take it for a test ride.
Made it about 3 Miles to the gas station and the rear brake had gotten stuck. Also, the lever was froze solid like it was pressurized. It took almost an hour for it to cool down and release pressure enough to get it home.
Since then I have removed and sanded/polished the Allen head bolts in the rear caliper which the pad rides on. Thoroughly bled the brake system until it all the old/dark fluid has turned clear coming out of the bleeder valve.
Since then I have ridden it twice. The lever will feel like everything is working properly, and then it will start to feel like it is building pressure on the lever, and that's when the brakes start to stick again.....
Any help would be greatly appreciated!
Thanks in advance!

Here is a thread that may shed some light on your issue. Good luck. GTV rear brake sticking?

My MP3 250cc sits idle through the winter months.

come spring, the rear brake is locked up.

I just wiggle the bike back & forth until it will move,
once it start rolling, I go for a ride and use light pressure on the hand brake to clean the Oxidation off of the rotor....

brakes do not like to be left idle, the brake dust gets wet, and then it glues itself to the rotor and pads.