I just got a new set of tires and rims. Went from 25" to 26" tires. I also installed a new HD EPI belt about 2 weeks before the tires were put on. I had put on around 300Kms on new belt before I put new tires on. Now after a 30km ride on new tires something seems to be slipping. I did climb some hard hills but in low range, and all was good. Shifted into hi and could not get going and it sounded like the slipping sound was from behind me not below me. Put into low again to try and move a little and all was good with no squeel. Stopped and put it into hi again and it took off fine. This happened 5 times this weekend. I followed belt install to the letter. Cant find any other posts with similar problem. Is there anything in the transmission that can be slipping?