seventies2stroke Posted July 16, 2011 Share Posted July 16, 2011 Hi to all,looking for a little help with my 79 xs 250,the bike drives me nuts at the moment,had a lot of starting problems,which have been sorted pretty much,new plugs,new points,new condenser,new plug caps etc & it was running fine,however at the moment even though the fuel should shut off automatically via the vacuum operated tap,it does'nt,I have fuel in the cylinders and of course the bike rarely starts,I have tried to use a rebuid kit on the fuel tap but it's still allowing fuel to pass and flood the carbs.My question is this does anyone know of another Yamaha fuel tap that will fit my tank and do away with the pain in the backside vacuum rubbish,I realise that I will have to blank off the vacuum pipe from the carb inlet,but that's easily done............please help cos I really would like to take a 14lb sledge hammer to the old fuel tap and beat it into a million pieces....it would feel soooo good....thank you Link to comment Share on other sites More sharing options...
Moderator Airhead Posted July 16, 2011 Moderator Share Posted July 16, 2011 ..........please help cos I really would like to take a 14lb sledge hammer to the old fuel tap and beat it into a million pieces....it would feel soooo good....thank you Please...if you do that...just place it onto the CZ175 Trail and video it for us Link to comment Share on other sites More sharing options...
YPVS TONE Posted July 16, 2011 Share Posted July 16, 2011 Are you saying that the fuel still flows with the tap in the ON or RESERVE positions ? Link to comment Share on other sites More sharing options...
seventies2stroke Posted July 16, 2011 Author Share Posted July 16, 2011 Please...if you do that...just place it onto the CZ175 Trail and video it for us Link to comment Share on other sites More sharing options...
seventies2stroke Posted July 16, 2011 Author Share Posted July 16, 2011 Please...if you do that...just place it onto the CZ175 Trail and video it for us Gladly if it means I get the Yam sorted.......... Link to comment Share on other sites More sharing options...
seventies2stroke Posted July 16, 2011 Author Share Posted July 16, 2011 Are you saying that the fuel still flows with the tap in the ON or RESERVE positions ? Yes no matter what position the tap is in................ Link to comment Share on other sites More sharing options...
YPVS TONE Posted July 16, 2011 Share Posted July 16, 2011 Definately not right as the fuel should only flow in the On and Reserve position with the engine running. You could perhaps find another s/h tap or find a conventional tap like an early aircooled RD250/400 one as long as the distance from the holes is the same I can't see a problem. Remembering to blank the stub on the inlet manifold. Link to comment Share on other sites More sharing options...
seventies2stroke Posted July 16, 2011 Author Share Posted July 16, 2011 Definately not right as the fuel should only flow in the On and Reserve position with the engine running. You could perhaps find another s/h tap or find a conventional tap like an early aircooled RD250/400 one as long as the distance from the holes is the same I can't see a problem. Remembering to blank the stub on the inlet manifold. Ok thanks,I was hoping someone might of had expierience of fitting a conventional tap,but I will measure the distance between the holes and start looking.......... Link to comment Share on other sites More sharing options...
Moderator drewpy Posted July 16, 2011 Moderator Share Posted July 16, 2011 Ok thanks,I was hoping someone might of had expierience of fitting a conventional tap,but I will measure the distance between the holes and start looking.......... recheck you built it right. I did mine and took a few goes to get it right, usually the holey disk is put in wrong. If you still have no joy, I think I have a spare 2nd hand one. Link to comment Share on other sites More sharing options...
HoughMade Posted July 24, 2011 Share Posted July 24, 2011 I put a manual petcock from this website on my XS400. I used the universal petcock and the 46mm plate. Measure yours to be sure. http://www.partsnmore.com/parts/yamaha/xs400f/?filters[category]=carb Link to comment Share on other sites More sharing options...
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