code3run Posted July 16, 2008 Share Posted July 16, 2008 I have two questions re my Yamaha TTR50 1. When you reve the engine thier is a delay before the rpms come back down. What could be the cause? 2. Why does the choke always have to be on before this thing will start? Seems even if warmed up, it wont start without the choke on?? Any info would be helpfull Link to comment Share on other sites More sharing options...
Moderator Airhead Posted July 16, 2008 Moderator Share Posted July 16, 2008 I have two questions re my Yamaha TTR50 1. When you reve the engine thier is a delay before the rpms come back down. What could be the cause? 2. Why does the choke always have to be on before this thing will start? Seems even if warmed up, it wont start without the choke on?? Any info would be helpfull Both symptoms suggest its too lean with closed throttle, maybe the air screw is too far out or the pilot jet is blocked or fuel level in carb is too low Link to comment Share on other sites More sharing options...
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