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XT600E carburetor problem XT600E carburetor problem
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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

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



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  #16  
Old 7 Aug 2018
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Quote:
Originally Posted by backofbeyond View Post
I hope the new jets do improve things because 153 C must be getting towards the point where even the best oil is beyond its limit. How are you measuring this - IR thermometer? - and where? The exhaust headers / manifold should be way over that (maybe 300C) but for the rest of the engine even your 115 C is too high.
I measure it using the TrailTech Vapor, which measures it from the sparkplug.
I figured the mods might make it run a bit warmer too so I ordered an oil cooler.
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  #17  
Old 7 Aug 2018
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Is the temp oiltemp, and meassured where?

Mine in the frame rarely exceeds 120c
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  #18  
Old 7 Aug 2018
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Originally Posted by Jens Eskildsen View Post
Is the temp oiltemp, and meassured where?

Mine in the frame rarely exceeds 120c
Temp is measured from the sparkplug
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  #19  
Old 7 Aug 2018
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Quote:
Originally Posted by MrRedTube View Post
Temp is measured from the sparkplug
measure it in the oil, in the spark plug there is much more temperature than in the oil ..... have you looked at the color of the spark plug to know if it is lean or fat?
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  #20  
Old 7 Aug 2018
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Originally Posted by bacardis View Post
measure it in the oil, in the spark plug there is much more temperature than in the oil ..... have you looked at the color of the spark plug to know if it is lean or fat?
Don't have anything to measure the oil directly, will see if I can find something fast.

Will also take a photo of the sparkplug when I get back home and the engine has cooled down.
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  #21  
Old 7 Aug 2018
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https://mzriders.com/viewtopic.php?f=3&t=3536#p26080
look at the settings they used here
Last edited by bacardis; 8 Aug 2018 at 01:19.
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  #22  
Old 7 Aug 2018
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Removed the sparkplug, outer ring is black, insulator is white grey-ish. Didn't go really high in revs, maybe 5k for a short time. Will post pics of the sparkplug soon.

EDIT:





Last edited by MrRedTube; 7 Aug 2018 at 23:07.
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  #23  
Old 7 Aug 2018
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Found out the sparkplug might not have sealed properly because of the Trailtech temp meter thingy. Put a new sparkplug in and taped the temp meter to the oiltank untill I find a proper place to install it
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  #24  
Old 8 Aug 2018
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https://mzriders.com/viewtopic.php?f=3&t=3536#p26080
look at the settings they used here
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  #25  
Old 8 Aug 2018
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I measure the oil temps in all my XT's by TrailTech 6mm probes in the head just above the right exhaust valve . Gives me the highest reading and quickest to show temp changes depending on conditions . Is also way, way less effected by ambient air temps that give false reading because the air is cooling the probe .

You can see the probe just under the decomp lever and tach cable , in this picture I also had one of the other probes for testing and comparing to the oil probe , big difference no matter where I had it. Will always use the oil type but a person needs to drill and tap the hole in the plug on the side of the head .
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'86 XT600/3TB motor,,, '88 XT600, ,,'92 XT600e,,, '08 Husky TE510,,, '05 DRZ463,,, '95 KLX650 ,,,'96 KLX650
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  #26  
Old 8 Aug 2018
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Quote:
Originally Posted by bacardis View Post
https://mzriders.com/viewtopic.php?f=3&t=3536#p26080
look at the settings they used here
I based my jets off of his, but his are for a stock intake, stock exhaust xt600.
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  #27  
Old 8 Aug 2018
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Originally Posted by jjrider View Post
~~snip
I'll see if I can find that probe from somewhere nearby, thank you!
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  #28  
Old 8 Aug 2018
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Quote:
Originally Posted by jjrider View Post
I measure the oil temps in all my XT's by TrailTech 6mm probes in the head just above the right exhaust valve . Gives me the highest reading and quickest to show temp changes depending on conditions . Is also way, way less effected by ambient air temps that give false reading because the air is cooling the probe .

You can see the probe just under the decomp lever and tach cable , in this picture I also had one of the other probes for testing and comparing to the oil probe , big difference no matter where I had it. Will always use the oil type but a person needs to drill and tap the hole in the plug on the side of the head .
how did you squezee it there ? will try and do the same!

loving this tacho so much! thanks to Vando everything is working properly !
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  #29  
Old 8 Aug 2018
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Added some oil, got the sparkplug properly installed again, weather cooled down and now it seems to be running cooler. Can't actually measure it, but it seems to be running cooler.
Before I could hear the metal make cracking noises from the heat, can't really now. Will still be installing an oil cooler. Will also be taking the bike to the tuning shop. Don't want to buy an AF meter for 100-150 euro and still **** up the jetting.

Thank you all for responding to my post!
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