My son rides a 2011 KX 85. We recently rebuilt the top end and added a weiseco light weight pistona dn rings and a vortex triple stage reed and the motor is so much faster. But now we are having new problem, no traction in the florida sand and at 93lbs hes trippleing jumps and bottoming out the suspension.
Hes just getting into racing and my questions are:
What gearing should we run on the rear sprocket? (Still running stock)
What Tires are best for florida sand? (Still running stock)
Should we go with Stiffer Springs front and rear now that he apparently wants to jump everything in sight? (Still running stock)
Any recomendations would be great!
President, CEO Relentless Media Group
Get the suspension set up for his weight, set sag, If you ride fast tracks use a smaller rear sprocket, If the tracks are tight go bigger on the rear. As for the tires sand tires usually have a wider knob space pattern, Pirelli, michelin make a great tire. look at their websites and you can pick a tire selection for your riding conditions. Good luck, keeo us posted.