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 Loss of power and hesitation at 1/4 throttle.

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PostSubject: Loss of power and hesitation at 1/4 throttle.   Mon Sep 10, 2018 1:56 pm

I'm at riding today and everything was going great. Then after about 1.5 hours in, it starts to lose power every time you give it gas. It makes it almost unbearable to ride because there is no low end power and it's completely jerky.

I can barely ride it in the street. It seems to do fine at upper rpms, but getting there is half the battle it seems.

I wasn't paying attention and fueled it with 87 octane, but that shouldn't make too much of a difference. Could it be water in the fuel?

I added fuel treatment and 90 octane to see if it helps. I've been idling it at the ride park hoping to get going before I have to leave. So far, didn't help.

Here is a video of the problem it's worse under load.

Https:// youtu.be/g687UfAl_bE
Better video that shows full throttle.
https:// youtu.be/qCNXhdIX2aA
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PostSubject: Re: Loss of power and hesitation at 1/4 throttle.   Tue Sep 11, 2018 3:24 pm

Could be a number of things.

Do you have a shop manual?  if not, get one.. the trouble shooting guide is a bit handy.

Is the airfilter clean?

Check your battery connections and make sure they are clean and tight.

87 octane should not have caused that - I have ran it a few times by accident on my bike and there were no concerns.

Check for a vacuum leak or loose hose.

Any mods on the bike?

How old is the battery?
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Loss of power and hesitation at 1/4 throttle.
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