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shrekmoose

426 high rpm sputter

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I just recently developed a high rpm sputter on my 2001 426. bike sat for about a month (had a broke subframe bolt to fix) and when I fixed it and started it now has this sputter. I noticed when I was doing my subframe that my exhaust band clamp was loose and exhaust could just be pulled off by hand. So I tightened it all back up and while it has got rid of my popping on decel, it makes it to where when i open it up with the rpms up it misses and kinda sputters. Any ideas what this may be? maybe jetting is off now?

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so in other words imma have to tear into my carb no matter what pretty much. I am hoping its in the carb, i have lost alot of compression until it warms up. I assume my rings are not sealing well. So looks like there is a top end in the near future. Would that have anything to do with the miss?

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... i have lost alot of compression until it warms up.
That is a symptom of tight intake valves.

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would that cause the sputter, or is that more than likely just cause its an older bike and never had the valves adjusted before?

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would that cause the sputter, or is that more than likely just cause its an older bike and never had the valves adjusted before?
Dirty carb, bad plug.

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