Polaris Headlights dimming, a callout to Polaris mechanics.

[big_bill]

Okay, here's my dilemma. I have a 2000 600 Touring with 20000 miles on it. Total rebuild 2 seasons ago. Even before rebuild, headlights would be dim at first, but after running a bit, the lights would be normal. Getting worse this year so first I checked all the connections. Still dim. Just replaced the REGULATER-RECTIFIER SNO,LR26 Part # 4010196 but still dimming on and off. Then I cleaned the little groung wire that goes from negetive post to solinoid on battery box. Cleaned negetive cable where it bolts to starter mount. Any other things I need to do? What else will cause this? My Brother also has the same sled but with less miles, and lights also dim at first, but when get bright, they stay bright. I very much appretiate any and all the help I get and have gotten in the past from the great people that use John Dee.