You are buying RC that are not meant for RACING.... That is your problem. Jato is a street thing meant to go straight.
If you want to race, you need to get something made for racing and it is not cheap no matter how you go.... But right now, I would suggest the Losi 810
http://www.losi.com/Products/Default...rodID=LOSB0021
$400.00
or MY BEST suggestion is the Losi 8 RTR
http://www.losi.com/Products/Default...rodID=LOSB0084
$700
No cheap OFNA, you will be in the same boat as you are now.