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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. |
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#1
28 Apr 2010
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xt 600 3tb no spark
hi bike was running great (1991 3tb) then cut out about 30 mph , all electrics working ,lights horn etc , motor will turn over , but no spark , what do you think , coil or cdi ?
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#2
28 Apr 2010
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find a mate who has a running bike and swap one piece over at a time till problem found......
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#3
28 Apr 2010
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aye thats what i would do , if i had any friends with a xt
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#4
28 Apr 2010
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give an idea of where you are in the uk some one will help could be the igniter coil (pick up coil)as well to add to your list of coil and cdi
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Twenty years from now you will be more disappointed by the things that you didn't do than by the ones you did do.
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#5
28 Apr 2010
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i am in Edinburgh
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#6
28 Apr 2010
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Double check your connections, they aren't the best.
How did your plug look? Try a new one for the sake of it they are cheap anyway. Is your bike an import? If it is look for butchered connections and taped joints in the loom, if you find any you might be worth looking for a new loom. Keep us posted on how you get on.
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Tom XJ600 Diversion
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#7
28 Apr 2010
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Well, I think you've just fragged your camshaft chain!
Vando
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#8
28 Apr 2010
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Quote:
My starter relay problems were down to a bad connector and coincidently and fortunately whilst the Auto electrician was here the ignition circuit decided to play up and both of them were down to bad connectors. Mines a TTR with even crappier electrics.
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Yamaha TT600RE 2004 Yamaha YZ250 2 stroke 99
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#9
29 Apr 2010
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fault finding guide
try to use this
Technical Article: Motorcycle Electrical Fault Finding Guide - ElectroSport Industries the correct impedance values for your coil are in service manual, downloadable from link top of XT page here. get a tester and test the values, if you r out of range, it's the coil. anyway,make this test: if you take your rear light lamp, and connect to coil wires, if ignition unit is ok the lamp should flash when you press start button.
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http://www.bikepics.com/members/b4nz4i/
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#10
29 Apr 2010
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Quote:
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Tom XJ600 Diversion
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#11
29 Apr 2010
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When mine broke it still sparked but it just wouldn't turn the bike on that's why I mentioned it....
and it's really simple to check if it is broken or not... On the left side of the engine cylinder is the camshaft chain tensioner. Take it out and put a finger in there and do like you know how and see if it is there..... Vando
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#12
29 Apr 2010
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Quote:
__________________
Tom XJ600 Diversion
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#13
29 Apr 2010
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thanks for all the replies chaps
managed to get a look at the bike tonight , bit shocked when some one suggested a snapped cam chain , my motor is very quite (even quiter now)and i think i would have heard something as the chain turned everything into mince meat , anyway i had a look through the rear rocker cover and chain is intact  i checked all connections and every thing looks ok , also no obvious broken wires , i hope to have a new coil tomorrow ,so will try that ,will let you know what happens
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#14
30 Apr 2010
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woopee £20 coil arrived from wemoto , wired it up and low and behold lovely big spark
tank on and first touch of the button she fired up  and the sun is out
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