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Discussion Starter · #1 ·
OK THIS IS THE PROBLEM.
From one day to another, the machine goes well, the day after starting barely and misfires when given gas, slightly better at higher revs an no air lid but much worse at lower revs.
This is done:
Stator, ignition coil, cdi, ignition cables and spark plug replaced.
Reverse sensor and neutral grounded.
Valves adjusted.
Carbs cleaned.

Yamaha 2005 in stock condition.
sorry for bad english, im swedish
 

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Premium Member
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4,191 Posts
I think you actually said you were having the exact same problems as another guy, did you already try what QM and Willy said to try in their responses?
 

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Master of the Electron
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15,685 Posts
OK THIS IS THE PROBLEM.
From one day to another, the machine goes well, the day after starting barely and misfires when given gas, slightly better at higher revs an no air lid but much worse at lower revs.
This is done:
Stator, ignition coil, cdi, ignition cables and spark plug replaced.
Reverse sensor and neutral grounded.
Valves adjusted.
Carbs cleaned.

Yamaha 2005 in stock condition.
sorry for bad english, im swedish
Were these things (in red) done AFTER the problems began or before?

You say 'slightly better with no lid' - do you mean that when you remove the airbox lid the symptom gets somewhat better?

Do the symptoms follow throttle position or RPM's?
 

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Master of the Electron
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15,685 Posts
I'll ask again -

You say 'slightly better with no lid' - do you mean that when you remove the airbox lid the symptom gets somewhat better?

and

Do the symptoms follow throttle position, or RPMs?
 

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Discussion Starter · #9 ·
I think the symtoms getting better with no air lid on, (but far from good) but only in higher revs.
I think the symptoms follow RPMs.
At idle and lower revs it goes much worse, but when you accelerates out of it better.
Then suddenly, it can die.
Then I think it smokes out the muffler for a while after you hit it off, I have never seen it before.
This is hard to describe in english but John Boys symptoms did with mine.
 
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