jamiemarshall283 Posted May 7, 2022 Report Share Posted May 7, 2022 Hiya I've got a sherco st300 2016 I was riding one day and everything was fine I washed it started it after a week and floats were stuck managed to sort that cleaned all jets too fully cleaned. Now I have a problem where the bike while rev uncontrollably high with the choke turned on. And will only turn on with choke on. Switch choke off and I can keep it going with blipping the throttle it'll rev high and come back down sound but when I let go it will not idle whatsoever and it feels like the idle screw is doing feck all. So to sum it up revs like the ******* is gonna blow up with choke on and then will not idle with it off Could do with some help cheers Quote Link to comment Share on other sites More sharing options...
thesolidman1 Posted May 7, 2022 Report Share Posted May 7, 2022 I would check for a vacuum leak at the intake manifold, and cylinder base gasket by spraying some carb cleaner on those areas while it's running. Mine had a similar condition. It was a failed base gasket. 1 Quote Link to comment Share on other sites More sharing options...
reggie Posted May 7, 2022 Report Share Posted May 7, 2022 I think it may be a good idea to re-check the cleanliness of the pilot jet. Quote Link to comment Share on other sites More sharing options...
jamiemarshall283 Posted May 8, 2022 Author Report Share Posted May 8, 2022 Cheers for help people it were reed valve gasket had shat it's pants all good now. 1 Quote Link to comment Share on other sites More sharing options...
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