do u know how fast the sp500 goes stock on a paved road. i got my sp400 up to 58mph and i was wondering in a mile long race who would win. i no the 500 has better acceleration but at topend speed i think they would run neck and neck. Is this true?

 

That is what the top end of my 500s have been - 60mph.

 

Ive got my 400 up to 55mph.
My brothers HO does 60mph, maybe 61-62.

I dont think they would be neck and neck at all in a race.