in my 93 xlt sp, i run br9es, they are decent plugs, but sometimes can foul way too easy, i have also run br8's, and have had good luck with them. or you can always go to a champ plug, thats what most of the polaris sleds come with off the assembly line. if your unsure, look on your underhood decal, they cross-reference your plug from what polaris recommends.
And on your headlight troubles, an ohm meter will work good, but i had a 92 trail that the headlight wouldnt always work, seem like everytime i hit a bump it would go out, you may want to test the prongs that stick out of the headlight to wnsure you have contiuity there as well.
Edited by - xltman on 09 Feb 2002 15:21:44