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Discussion Starter · #1 ·
I have a 2000 ST2 with 24,000 miles on it.
Here's what is happening with it, when you get on the throttle and reach 3-3500 rpm it
acts like it is hitting a rev limiter, then it'll clear up and do it again at about 6000 and
won't go past 6.

I have never worked on it outside of adjusting the valves and changing the belts couple years ago and regular
upkeep.

Is this possibly a timing issue or ? Someone even suggested a ground problem.

Thank you for any help or suggestions on how to proceed
 

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My first thought is a split in-tank fuel line, but the fact it can get to 6K makes me question that. Still, I'd go for the fuel line possibility to start.

What is that last service you, or anyone, have completed on the bike?
 

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Discussion Starter · #3 ·
Thank you, I'll look at the fuel line.

Last major service, besides oil & filter, etc. was in spring '17, checked valve adjustment & replaced
belts.
 

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Sounds very similar to my friend's ST2. IT would run up to about 4K, stumble, and then over that it ran well. His turnd out to be the TPS. You should be able to verify the TPS with a DC Voltmeter. You're looking for a "clean" climbing voltage from the idle position to wide open. Any glitchy readings would indicate that the pot is bad.

He had a dealer diagnose and fix his, at the time.
 
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Discussion Starter · #6 ·
Thank you, I am going to check that. That's what my son suggested also.
I haven't had any time to check the fuel line or this yet.
Hopefully over the next few days.

Thanks again for the help everyone!
 
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