back from my ride on Hatfield and MacCoy Rock house trial system and your recommendation big horn over my new Zilas was right on money a lot of rocky terrain some mud but nothing the big horns couldn’t handle that we found thanks again. but my new Zilas do look bad ass on my bike. Now have to do clutch mods any recommendation on were to buy purple spring and 1.7 mm shim and or part numbers. on a side note that trail system was awesome