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Yamaha Tech Originally the Yamaha XT600 Tech Forum, due to demand it now includes all Yamaha's technical / mechanical / repair / preparation questions.
Photo by Andy Miller, UK, Taking a rest, Jokulsarlon, Iceland

I haven't been everywhere...
but it's on my list!


Photo by Andy Miller, UK,
Taking a rest,
Jokulsarlon, Iceland



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  #16  
Old 16 Aug 2014
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Yeah man it's the valves... I've adjusted them as the manual said but here in Crete is too hot and they need to be readjusted... didn't alter the frame at all....I'm using a dellorto phm 38mm mechanical carb... the bike is completely different... its like riding a Duke 2
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  #17  
Old 16 Aug 2014
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Nice the dell'orto is pretty tough to Dial in for idle and medium throttle. But it rocks at full throttle . The bog you are experiencing is due to lack of acc pump. When you WOT the vaccuum isn't high enough to draw fuel fast enough. That's why most mechanical slide (round or flat) carbs use an acc pump . Do you have Any pics of the mounting process? Jakob
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  #18  
Old 16 Aug 2014
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Acc pump ? Which one did u use? Is that way I get so many un burnt fuel and some lags? My idle is ok I guess... in the middle revs is most of my problems .. wot? What's that?
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  #19  
Old 16 Aug 2014
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Will take some photos for u yeah!
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  #20  
Old 16 Aug 2014
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I use a Keihin FCR39 flatslide carb yes my guess is that's why you have the lags as the vaccuum drops when you twist the throttle (WOT=Wide Open Throttle) therefore not being able to draw fuel fast enough. That's why an accelerator pump is added so it pumps fuel in the manifold when you twist the throttle Quick.
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  #21  
Old 16 Aug 2014
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Oh ok!! I know u have a fcr 39mm man! I was asking to know which acc pump are u using lol!!!
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  #22  
Old 16 Aug 2014
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Arh ok. The acc pump is build into the carb
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  #23  
Old 17 Aug 2014
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Didn't know fcrs' had acc pump! Maybe dellorto has one too? What does it look like?
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  #24  
Old 17 Aug 2014
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Nope. Dell'ortos don't. Just try to Google "accelerator pump fcr 39" or similar


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  #25  
Old 17 Aug 2014
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I'm gonna keep it for a while and then trade it for a fcr and cover the difference
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  #26  
Old 17 Aug 2014
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I forgot to ask... what pulse did u put on your vapor jakob? I think my rpm is a bit off...
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  #27  
Old 17 Aug 2014
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Yamaha XT 600 single carb + KTM shock - How it was made

I spliced into the orange wire going from the TCI to the ignition coil. You need to use the wire with 1k resistance. Otherwise the rev counter will Go nuts. Jakob


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  #28  
Old 17 Aug 2014
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I just did what the manual said and wrapped it around the cable that leads to the spark plug but it does not work properly...
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  #29  
Old 17 Aug 2014
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Yearh. That's what I experienced too. That's why I spliced into the orange wire


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  #30  
Old 18 Aug 2014
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How about the temp sensor? When I put it in the spark plug I can't fully bolt the spark plug because the cable is in the way...
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