Jeffcomerford Posted November 25, 2021 Report Share Posted November 25, 2021 Good Morning All, I have a 2020 Beta 300 2 stroke that I bought used last week. It has a carb on the unit that doesn't have an idle adjustment. Does this make sense? The carb on the unit is a Keihin NB5 A 1EP. Thanks Quote Link to comment Share on other sites More sharing options...
on it Posted November 25, 2021 Report Share Posted November 25, 2021 50 minutes ago, Jeffcomerford said: Good Morning All, I have a 2020 Beta 300 2 stroke that I bought used last week. It has a carb on the unit that doesn't have an idle adjustment. Does this make sense? The carb on the unit is a Keihin NB5 A 1EP. Thanks hi,jeff they are a black plastic screw (not the best ) you may find it has snapped off ,they are just in front and above of air screw 45 degree going up to slide easy to drill out if it has hope this helps 1 Quote Link to comment Share on other sites More sharing options...
magnapoxy Posted November 25, 2021 Report Share Posted November 25, 2021 same plastic on my 20 scorpa. my time is coming too. Find a dirt bike shop show them the carb replace the screw with a metal one, unshure where you are in canada-- if you have time to look on the www, go here www.pjmotorsports.com they are in oregon. bought from them many times over the years. Quote Link to comment Share on other sites More sharing options...
Jeffcomerford Posted November 25, 2021 Author Report Share Posted November 25, 2021 Thanks for the reply guys. These are the pics of the carb without an idle adjustment. 1 Quote Link to comment Share on other sites More sharing options...
peter_steer Posted November 25, 2021 Report Share Posted November 25, 2021 Hi Jeff, You can see the snapped off adjuster to the right of the fuel pipe inside that small circle housing. If you are careful, you may get away with heating up a flathead screwdriver and pushing it into the remaining bit of plastic to make a groove, let it cool down so it goes hard and then hopefully you can just unscrew it out and replace. If that doesn't work, as on it says, you can drill it out Good luck 2 1 Quote Link to comment Share on other sites More sharing options...
dan williams Posted November 27, 2021 Report Share Posted November 27, 2021 The carb model is a Keihin PWK-28. Jitsie and S3 make aluminum adjusters to replace the plastic screw that has no place on an otherwise excellent carb. For the S3 and Jitsie replacements for the carb and levers I find it helps to run them through a die to clean up their threads before installing them. If you don’t they bind. I think the anodizing after the screws are machined is a bit too thick. 3 Quote Link to comment Share on other sites More sharing options...
PakJeem Posted November 28, 2021 Report Share Posted November 28, 2021 Heck maybe if you put the groove in it with the hot screwdriver you can just keep using it like that! Quote Link to comment Share on other sites More sharing options...
Glayne Posted November 28, 2021 Report Share Posted November 28, 2021 I agree with everyone else^^^^ where abouts in Canada are you? Quote Link to comment Share on other sites More sharing options...
Jeffcomerford Posted November 29, 2021 Author Report Share Posted November 29, 2021 Hey Gents thanks for the interest. I'm writing from Newfoundland, Eastern Canada. Quote Link to comment Share on other sites More sharing options...
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