Kombat 1000 Orange - 50cc Stock - maybe faster top than 1250 but less bottom hit
Kombat 1250 Green - 50/70cc Stock - Good for woods and stock limited 50cc class
Kombat 1500 Dark Blue - 90cc Stock - Mid Race 70cc
Top Gun Hole Shot 1,000 - Gold - Super fast spring shift
Top Gun Hole Shot 1,500X - Yellow - - NEW AUGUST 2017 - NATIONAL SPRING
Top Gun Hole Shot 1,500TG -Silver - Industry standard for last few years - Multiple championships
The rear torque-driver spring also has a
very specialized function which is to maintain enough tension on the
belt to keep it from slipping.
This also is a bit of balancing
act because too much belt tension translates to inefficiency. It’s kind
of like over-tightening the chain on your bicycle- power is wasted by
over-stretching the belt. On the other hand, too little tension and the
added power of your recent engine modification will vanish as heat
generated by belt slipping and won't find its way to the rear tires.
trick is to find the just the right tension without overdoing it. A
secondary influence of the torque driver spring is that it has a slight
impact on shift speed since the belt tension needs to be reacted against
by the front sheaves. The higher belt tension tends to push the belt
deeper into the front sheaves making the ratio higher, and revving the
Therefore, for a given desired rpm you would need
to compensate with a higher roller weight to bring the rpms back down.
After a torque driver spring change, it’s good practice to re-optimize
the roller weights.