I don't race chainsaws any longer but still have a lot of stuff from that time. Here are two neat belly bars. As you probably know the belly bar is good for less friction when racing because the chain wants to make a circle when at speed. These bars were used very little and are still tight and square with no slop or bad spots. The slot is 10mm and the groove is .063. The longer is about 30 1/2 inches overall and the other is about 28 1/2 inches. Both have the roller nose so you can use any pitch chain that matches your driver (rim). $100.00 your choice and shipping extra. Mike