Hi , my name is Larry and I am new to this site . I have a 1999 Yamaha grizzly 600 . I have no spark . I have checked all the other components by the shop manual and they seem to be OK . I have been told that it is probably my CDI unit . I took the CDI unit out and the back of it looks like it has gotten pretty hot . Does anyone have any ideas and where can I get one of these . Yamaha sells these new for around $400.00 . I cant really afford that much . Can anyone help ! Thanks