I am having the same problem with mine. I swapped to regular grade gas and it doesn't fire. I can roll start it, but to push the button just runs the battery down. If I move the choke while trying to crank it, it backfires. I am waiting for my new iridium spark plugs to get in in a couple of days, we will see then. I have fooled with the stand switch and everything. I just think I have a fowled out spark plug.
Update: I hooked the tender up last night and let it charge all night, woke up this morning and she fired right up. Still can't wait to get those Iridium's in, that will hopefully eliminate the not starting after it's warmed up issue.
1986 Vulcan 750
30,000 miles and counting
Castrol GTX 10w-40
WIX- Gold oil filter Pt.#1356 @ Napa Auto supply $8.00
Seafoam-2 oz. to every other tank of gas @ Napa-$10
Yuasa M/F battery- YTX14AHL-BS
Lubed Splines- Moly EP Grease, 1lb. tub $3.49-Autozone Pt.#561753
Sprayed U-joint with Liquid Wrench White Lithium Grease- $3.99 Autozone Pt.# 828796
Castrol Hypoy C 80w90 Gear Oil $5.99- Autozone Pt.#991558
NGK Iridium IX Spark Plugs, $8.99(x4)=$35.96 Autozone Pt.#088394.
Last edited by Striker1; 03-26-2012 at 10:31 AM.