First off let me say that this is my first post although i've been reading these forums for a while before i got my moped. i purchased a tomos streetmate in september and it was great! then after riding it for a bit i found that everytime i approach any speed over 29mph it feels like the spark stops in the engine. the engine doesnt turn off but it stops pushing the moped along. even when i go down a hill it does this and it feels like it's engine braking but im not controlling it. its strange. well being that i have alot of things with engines on them i figured that tomos put a speed restricter on it. this may not be the case but i need all of your help to figure out why it does this? thanks guys!