Hi, I'm new to this sled and would like to change the chain case oil so any tips or suggestions would be appreciated. Is there a drain plug on this model ? After doing a search on this site some other yamaha models have one on the back side of the chain case under the sled. This is a great sled and after a good ride on saturday, I think it might need some clutch work because top speed was 100 km/h or 60 mph and this sled should be capable of a little more again from what I read on this site. It idles great and starts real easy, mileage is about 4800 Kms. thanks