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XT600E 1995 won't start XT600E 1995 won't start
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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 George Guille, It's going to be a long 300km... Bolivian Amazon

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


Photo by George Guille
It's going to be a long 300km...
Bolivian Amazon



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  #16  
Old 22 Jul 2010
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hmm to check if timing is correct, you should mark on the cd a sector same as on flywheel, not an arrow... correct me if i'm wrong... is the arrow you marked in the middle of the sector on flywheel?
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  #17  
Old 28 Jul 2010
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I have tested my TCI on another xt and it starts without problem.

Now i am really confused. I've got spark, I've got gas, timing is ok... still doesn't starts.

If i remove the airbox i get small explosion in the intake, but with the airbox on i don't hear it at all.
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  #18  
Old 28 Jul 2010
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Quote:
Originally Posted by cyberzar View Post
hmm to check if timing is correct, you should mark on the cd a sector same as on flywheel, not an arrow... correct me if i'm wrong... is the arrow you marked in the middle of the sector on flywheel?
the arrow is set in the middle of the flywheel mark |-|
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  #19  
Old 28 Jul 2010
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Valves/valve clearances O.K?
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  #20  
Old 28 Jul 2010
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ok..

Try checking if its the carb... Spray some "powerstart" or similar highly flamable spray into the airbox while cranking it over. If that doesnt work and you're SURE the spark is good then it can ONLY be compression. Maybe you've broken a piston ring or headgasket..
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  #21  
Old 28 Jul 2010
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Have you tried a new spark plug? Sometimes the spark looks good but breaks down under compression. Contaminated fuel? Drain and try fresh.
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  #22  
Old 29 Jul 2010
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I have checked the compression and it's 11.

Valve clearance is ok.

I have measured the pick-up coil and it's 237 ohm and in the manual it's between 184 ~ 276 ohm.

I will buy a powerstarter spray and try it.

Here are pictures with distribution on, am I wrong?

http://motostart.ro/uploads/DSC00197.JPG
http://motostart.ro/uploads/DSC00199.JPG
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  #23  
Old 29 Jul 2010
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11 in comp seems high if its a stock bike. I believe theyre around 8-9:1 from stock.

Did you meassure it in psi or such? I've got a factory workshop manual vere the "limits" probably are meansioned.
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  #24  
Old 29 Jul 2010
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Quote:
Originally Posted by Jens Eskildsen View Post
11 in comp seems high if its a stock bike. I believe theyre around 8-9:1 from stock.

Did you meassure it in psi or such? I've got a factory workshop manual vere the "limits" probably are meansioned.
11 kg/cm2 wich would be 156 psi as in manual.
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  #25  
Old 29 Jul 2010
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Originally Posted by tzolea View Post
11 kg/cm2 wich would be 156 psi as in manual.
Which is very healthy compression.

Gotta be fueling then ! Get the powerstart in there asap.
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  #26  
Old 24 Aug 2010
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After pulling the bike for a while with the car the bike started. For about 2 minutes only in high rpm. The dead again. Went home checked the fuel level and spark... and no spark. I bought a new ignition coil (even the values are like in the book) and now the bike starts but it has erratic idle and misfire on intake alot and if i take it in high rpm bigger misfire occurs.
Now i am thinking if not the pick-up coil is faulty even if the values are ok according to the manual.
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  #27  
Old 24 Aug 2010
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have you checked the carb rubbers?...mine looked ok but when taken apart they were badly cracked and letting in air which made it hard to start and run very badly..
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  #28  
Old 24 Aug 2010
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Originally Posted by kenymact View Post
have you checked the carb rubbers?...mine looked ok but when taken apart they were badly cracked and letting in air which made it hard to start and run very badly..
now i have taken apart everything in the carb, is OK... after i rechecked everything I found the problem... spark plug gap too small... set to 0.9mm and now everything is OK.

Thanks to all.

Conclusion: Always test your ignition coil directly on battery... it is the best way to test it.
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