i just got a 03 636 3 days ago after getting rid of my 929. I noticed when i was riding that the temp gauge was all over the place like 165 to 184 back down to 173 etc etc. I'm thinking if it was a bubble in the coolant it would heat up then cool back down again but this is erraditic shi.... I am wondering if it might have a bad sensoir or something. Anyway, anybody else have this problem with their 636 and if so how did you fix it if i should worry about it at all. Any help is greatly appreciated