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VP out with U-4 in With U4.1

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Yeah, I saw that. I can't wait to try some out. I have used U4 for the last 4 years and never had any of the problems that people complain about, but the U4.1 sounds sweet.

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A less pungent aroma??? I love the pungent aroma:thumbsup: ,but for 2% more power than the old U4 I guess I can deal with it..:applause:

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I just got off the phone with a tech at VP. He said that the new version will resist the gumming much better but he still recommends draining the tank and flushing with premium pump gas between rides. If your riding multiple days in a row he said it would be fine to leave in just block off your vent tube so it doesn't evaporate. The only difference in the jetting from the old version is one jet size larger with the new version according to him. Of course your individual setup may vary.

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