Last week I tried to start the bike. Fresh fuel, priming was fine....and..
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It started! What a nice sound. What a joy! But as you can see, it was not maintaining idle speed...(white smoke is only the cleaner I used on exhaust pipes...)
First suspect was that stepper motor is not doing his job.....
Stepper is in this condition. Needless to say that it's the first version, the white one...
I tried pushing it gently and using a bit of WD40 and carb cleaner, but piston does not move. -it should, as per Errol's video...-
When I turn the ignition ON , this is what happens....(nothing!)
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True, is not moving at all....but it makes noise so I suspected the motor was still alive. I checked the resistance between the 4 connectors and the ohms were within tolerance as per maintenance manual,
To remove the stepper motor was a P.I.A.. I did it loosing first the yellow bracket holding the throttle cables
...only doing thay I could access to the lower-hidden counter bolt I had to unscrew...
The piston was completely stuck inside the cylinder.
I tried to clean it and pushing it back, but no way...piston does not enter. -it's not a joke ;-) -
So.......I tried to let it slide using another method....
...and after few attempts, it went in.
I did not use grease, only a bit of WD40.
The big challenge was then to put it together and try the stepper motor. I screwed in the piston in the motor -about 4 turns- and I then placed the cylinder on top, reassembling the whole system....and....and...and...
Stepper motor working!
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Wow, what a unexpected success!!!!!
And then, with all my 20 fingers crossed, I did the final test....
Idle sspeed ok!
Ohhhhhhh sooooo happyyyyyyyyy........