Well i took my KHS500 fat bike to the local bike shop yesterday to have the bottom bracket removed. This to check it to see if the bike is a candidate for a BBSHD 1000 w mid drive motor. And it is. These motors work best on bikes with a JIS/BSA threaded bottom bracket. There are adapters made for a couple of other styles as well. And the KHS500 4 season fat bike is a candidate. It,s bottom bracket is 100mm but i will be ordering the 120 mm to cover some possible interference due to the chainstay. The vendor will send a few spacers with the kit and sometime in the next week the kit will be ordered. So I will be the proud owner of 2 electric bikes, 1 BIONX road bike and a mid drive fatbike. I used to ride enduro motorcycles and trials so the fat bike is going to make a great dirt bike.