XR650-R Posted December 31, 2014 Share Posted December 31, 2014 Hi guys, As posted before bike starts and ticks over pretty good now, but noticed the tickover screw even when fully in won't increase RPM....if I back it out it will decrease ?.....not a big problem but would have thought it would increase and decrease either side of typical tickover as required ?.... Anyone have any thoughts on why it should be like this ? From what I can remember the carb slide did lift when winding in the screw when it was on the bench. Maybe it still down to the bike needing a good run and clear out ?....sadly with all the white stuff and cold weather that won't happen till Spring lol.... Happy New Year Link to comment Share on other sites More sharing options...
Moderator Airhead Posted December 31, 2014 Moderator Share Posted December 31, 2014 yeah it should increase, try it with the spring removed if it's ok then perhaps the spring is fully compressed when you wind the screw in? Happy Hogmanay Link to comment Share on other sites More sharing options...
KevtheRev Posted January 1, 2015 Share Posted January 1, 2015 Check the throttle valve where it engages with the adjuster screw . If it is pitted or worn it will be difficult to fine tune the tickover and should be replaced . Always lift the valve (via the twistgrip ) before adjusting the idle adjuster screw in order to prevent this type of damage occuring . 1 Link to comment Share on other sites More sharing options...
XR650-R Posted January 1, 2015 Author Share Posted January 1, 2015 Check the throttle valve where it engages with the adjuster screw . If it is pitted or worn it will be difficult to fine tune the tickover and should be replaced . Always lift the valve (via the twistgrip ) before adjusting the idle adjuster screw in order to prevent this type of damage occuring . Makes sense, in the past I have always just adjusted the screw inwards/outwards without doing the throttle lift bit. Don't remember seeing any damage to the vlave when the carb was in pieces but will check.... Link to comment Share on other sites More sharing options...
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