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Winterizing and "Winter" Gasolines

1895 Views 10 Replies 6 Participants Last post by  oddsox
Can anybody help me with a problem I'm having. My 1999 750 has developed a REALLY TERRIBLE sputtering and hesistation problem. It wont stay running at stops and at low RPM's it sputters like crazy. I was using 85 Octane all summer and have a feeling that the MTBE they use in Colorado gasoline during wintertime might be a cause. I replace the stock Champion plugs with NGK's and about 2 weeks later---BAM, hell broke loose. I've cleaned them many times and a spark test shows plenty of fire. I've tried bumping up fuel grade, but to no avail. I've drained the tank completely. Went back to go back to 85 octane. Ran great for 2 days!!!! Then I filled up with the premium, and the bull&^%$ happened again.

Need some help--Also what is recommended for winterizing the Ducks???

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If it is an icing problem, there is one thing I have done on cars that helps and that is to remove the crank breathing that goes into the air filter.
One way to check if its ice, run the bike untill it starts to misbehave then stop the engine for a couple of minutes alllowing the carbs to warm up. Then start it up again and if your bike is running good now (for a while ) there is a big possibility that ice is your problem.

DVC Keld
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