I pulled this thing out of my basement this morning (after 2 years of dormancy)and decided to get it running. I checked all of the electronics and such and they work fine, set my hyper .21 8 port to factory settings and replaced the glow plug. after messing with the needles, it idles fine.

However, when i hit the throttle, it lurches a little and goes about 5 mph. it barely picked up speed as i jammed the throttle. The engine reacted fine with higher revs and a nice sound, but the buggy didn't want to follow suit. what are some possible causes of this? i really forget alot about the mechanics of these things. thanks in advance.

-Bt