Went riding last night with a buddy (on his Arctic Cat 650 V Twin). I had a good charge on my battery before riding. We rode about 4 mile to a gas station and stopped for fuel. I turned off the Bombardier 800 V Twin and it barely started back over, had to wait a few minutes. We rode about another 10 miles and I accidentally hit the switch and turned off the quad. This time it had nothing at all for a restart. I had to swap batteries with my buddies and it started right up. When we got back after about 2 miles his quad had already charged mine and mine started right up. Is it my voltage regulator?