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78' ts250

  • Thread starter Thread starter Guest
  • Start date Start date
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Guest

Guest
So when I'm riding the ol' TS250 at highway speeds, 80km/hr or so and go to throttle up she starts to misfire. I can fix the problem by throttling down. If I'm in the bush I can rev it up and down with no problems, it's just at a constant high RPM that this issue happens. The bike rides perfectly except for the constant high speed issue. Any thoughts?
 
Could well be the plug. Is your TS one of the ones with provision for two plugs ? If so run the standard plug grade in one hole and a grade harder/colder in the other. From memory std is a NGK7, for sustained high revs, I'd use an 8.
The other prime possibilty is a partially blocked tank cap. The synthetic cork in them breaks up after a time. When it starts misfiring, open the cap and see if it stops it.
 
It's a single plug type. I'll give the colder plug a try, thanks.
 
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