1983 Yamaha YT175
Fired up for the first time after total rebuild. Now I have no idea whats going on. Compression is 120, new plug, new fuel and oil lines, new choke and fresh fuel. Carb cleaned and reeds are good (no gaps).
Will not start without choke and stalls out when choke is off. Played with choke adjustment and doesn't change.
It fires up first pull and only idles if I play with idle screw. As soon as I touch throttle, it goes bezerk on me and I have to shut it down as you can see in video .......
You can here the recoil lever tinging in the video. I lost the spring. D"oh!!
So far I have swapped ignition coil, spark plug, CDI with no change. I have removed flywheel to check keyway and it is where it should be.
Checked resistance on stator ... I get 10ohms +/- 10% on pickup coil within specs as per manual and I get 273ohms on charge coil. Manual states 300ohms +/- 10%, so that is also within spec.
I have also swapped out jet needle and played around with different settings. Eventually I put it back to the 3rd line.
The engine already has new seals and bearing so I am completely baffled as to what I am missing here.
Any and all suggestions will be appreciated.
I have also swapped carbs from a running YT175. Same results.
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