hunterz Posted January 20, 2009 Share Posted January 20, 2009 Hello I have a yamaha BWs 50 it was running fine a few days ago but now it bogs down or cuts out when you pull away but if the choke is half on it runs ok. I have checked the plug,reeds,manifold for leaks and adjusted the mixture. can anyone give me some help thanks Link to comment Share on other sites More sharing options...
Madison Motorsport Posted January 20, 2009 Share Posted January 20, 2009 That's the new Scoot stroker isn't it? You may have a dodgy HT lead. For a few £s or $s, it would be well worth picking up a new one - handy as a spare if nothing else. Link to comment Share on other sites More sharing options...
Moderator Airhead Posted January 20, 2009 Moderator Share Posted January 20, 2009 Hello I have a yamaha BWs 50 it was running fine a few days ago but now it bogs down or cuts out when you pull away but if the choke is half on it runs ok. I have checked the plug,reeds,manifold for leaks and adjusted the mixture. can anyone give me some help thanks Sounds like either water in the carb or a blocked pilot jet, either way its a carb strip and clean. Link to comment Share on other sites More sharing options...
hunterz Posted January 20, 2009 Author Share Posted January 20, 2009 Sounds like either water in the carb or a blocked pilot jet, either way its a carb strip and clean. hi thanks I will clean the carb. I forgot to say if you go along at just over half throttle the put full throttle on the engine dies for a few secs then picks up Link to comment Share on other sites More sharing options...
Madison Motorsport Posted January 20, 2009 Share Posted January 20, 2009 Ah! Sounds like a fuelling issue if it's bogging down when you rip open the throttle. Too much fuel and too little air. You could try a K&N (OE style) air filter to increase air flow. Link to comment Share on other sites More sharing options...
hunterz Posted January 20, 2009 Author Share Posted January 20, 2009 the mixture screw on the carb adjusts the air mix if I screw it in will that make it run richer or leaner Link to comment Share on other sites More sharing options...
Moderator Airhead Posted January 20, 2009 Moderator Share Posted January 20, 2009 the mixture screw on the carb adjusts the air mix if I screw it in will that make it run richer or leaner If it is an air mixture screw, ie on the filter side of the throttle slide, then screwing it in will make it richer However, if it is a fuel mixture screw, ie on the engine side of the throttle slide, then screwing it in will make it leaner Link to comment Share on other sites More sharing options...
hunterz Posted January 21, 2009 Author Share Posted January 21, 2009 Thanks for the help I think its sorted now Link to comment Share on other sites More sharing options...
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