get new plugs. week spark will not keep up with the fuel and will flood your engine. also make sure you have enough gas! pull the gas lines off at the carbs and pull til it spurts out gas or let it run off premix dropped in the cylinder til gas comes out of the lines. reconnect the fuel and run off premix again to fill carbs.
1987 chasis with 1985 597cc under the hood. Xtra-10, fox shocks, and a whole lotta speed!
If it says to use br9es, use them. Br8es is a hotter plug and can cause issues. I would highly recomend using the spark plug specifically designed for the sled. I bought new plug wires from oreilly auto parts. Cost 15 for 3 of them (triple) so bout 10 for a twin. Also got some new plugs to go with it. Does your plugs have threaded tops or solid tops?
must have just been a bit of ice. it worked fine when I went out today. I'm having carb troubles. I want to clean it, but I cant get it off the sled. I can get it out of the boots, but cant get the cables off.