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bike stumbles full throttle

4108 Views 6 Replies 4 Participants Last post by  Nick0187
I have a 1998 vlx that stumbles anytime I roll on the throttle more than 25%. It runs good at idle and when I open the throttle just a bit. when the bike is in neutral and I hit the throttle all of the way, it works pretty good, only when its under load is there an issue. Any ideas?

I have also checked for vacuum leaks and there are none.
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I'm with John on this one. Under load, the engine needs more fuel to rev up than it needs in neutral.
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