1955 fastwin magneto plate spinning????????????????

[Anthonyfasttwin]

I Just got done with the ignition system I put the flywheel back on toqured it to 45 ft. lb. And when I spin the flywheel the magneto plate moves with the flywheel causing the throttle to ingauge. What seems to be the problem?

 

[nwcove]

Re: 1955 fastwin magneto plate spinning????????????????

are your coils set flush with the bosses? could be rubbing on the flywheel.

 

[Chinewalker]

Re: 1955 fastwin magneto plate spinning????????????????

Yep, the coil heels are likely rubbing against the flywheel. They should be bang-on flush with the machined lip just below the heels, on the mag plate...

 

[F_R]

Re: 1955 fastwin magneto plate spinning????????????????

Can also be caused by the magneto retaining plate being upside down. It goes with the tapered side down.

Can also be caused by the magneto plate being broken--center bushing loose.

Can also be caused by the crankshaft bearings being totally worn out.

Bottom line is----SOMETHING is causing the coils to contact the flywheel magnets.

 

[Anthonyfasttwin]

Re: 1955 fastwin magneto plate spinning????????????????

The coils are not hiting the flywheel everything is clear

 

[F_R]

Re: 1955 fastwin magneto plate spinning????????????????

Well then, you have a new problem that we've never heard of. Let us know what it is when you figure it out.

 

[kfa4303]

Re: 1955 fastwin magneto plate spinning????????????????

Anthony, just to clarify. By "spinning" do you mean rotating counter clockwise when you twist the throttle, if so, that is supposed to happen. That's how the spark is advanced. As the flywheel spins clockwise and you twist on the throttle the magneto plate rotates (i.e. "spins") counter clockwise causing the motor to fire/spark more and more rapidly so that the increased fuel provided by the carb, can be burned, thus raising the rpms.

 

[Anthonyfasttwin]

Re: 1955 fastwin magneto plate spinning????????????????

Ok so After many hours of head scratching I finally figured out what the problem was. On the Arms of the points, the end where it touches the round magneto cam. When I put the flywheel on the first time the magneto cam was up because of the spring and when I pushed the flywheel down it messed up the ends of the Arms. I got a new set of points and it worked like a charm. Thanks for all the help guys It was my mess up