i keep destroying spurs within 10 min. please help!

[tha5150]

some of you may remember how i just got a Hyper 8 off ebay. well, i am having some issues here. 2 spurs came with it, along with a pinion. i only assumed they would fit. they did. BUT, the first time i went to the track within 3 ft the spur was chewed up. the next time, as soon as i tapped the trigger it was gone.

the strange this is, i drove it at my house, on the street and it was ok. this is probably where i chewed it up. ?? then once at the track just went kaput.

so today i went there and there was someone speaking of a Mod 1, 2, 4, etc. well i have no idea what this means. but i am sure one of you very intelligent people would be able to explain.

so what i got is the new medusa afterburner 2300, a MMM and pretty much stock everything. please send me to the right direction for my fixes and help me to understand what i am doing wrong. i am pretty sure the motor is tight enough. the mesh was probably ok on both and i am running 4s Lipo.

thanks again for all your help peeps!