Progress on the 750

[Johnny4428]

Seems to be a flat spot on the disc. I have checked other pics and they seem to be same.

[Nurse Julie]

Thanks very much guys. Julie I have checked this and here is my pic taken just now.

Something is bent there John. I'm not saying it was but it could have happened by trying to force the gears. Best thing is to take all that lot apart and see if you can select gears manually by turning the selector drum by hand and rotating the back wheel. If you can select gears that way, it's a selector mechanism issue, if you can't select gears, it's an internal gearbox issue.

[Johnny4428]

Thanks Julie, the gears all select smoothly with mechanism and no cover on. But I will take mech apart and re check, the thing is the selector drum and the neutral lever position cannot vary. The other things is I don’t like the way the alternator casing and the gear mech casing are absolutely jamming against each other.


Sent from my iPhone using Tapatalk

[Johnny4428]

It’s sorted! Working great through all gears. This definitely helped.

[Johnny4428]

And a small hand file where it was jamming. Not much clearance going into second gear!

[Nurse Julie]

Great, at least niggles like this can be dealt with before the bike goes on the road. I'm sure there is nothing worse than taking a bike out on her maiden voyage and everything jamming up 😭😭😭😭

[Johnny4428]

Indeed Julie, thanks for you support and input. I had to take very little off the inside of cover for it to clear. Roll on spring time!!😀😀

[royhall]

I'm very surprised at that outcome. If your having to remove metal from the casing something in the mechanism cant be quite right. This is a 47 year old bike that hasn't had that problem before?

[Bryanj]

It would suggest to me either a mishmash of parts or a very slightly bent pivot for the roller arm

[Nurse Julie]

Just for your info Johnny, here are a couple of photos from 2 of Grahams engine rebuilds. It will give you an idea of the clearance from the case there should be when everything is straight and true and assembled correctly.

 
[ Guests cannot view attachments ]

[Johnny4428]

Thanks Julie for posting pics! It is still a bit of a mystery to me, the only thing I can come up with is that the stopper plate is not the correct one for the bike. The main thing is she moves nicely through the gears.

[Johnny4428]

One or two more teething issues! Horn stopped working so stripped horn and got it “honking” again. Went to start bike then and it ran like shit. Not firing at all on 2 and 3 must have disturbed coil connections when I pulled horn wires apart. So removed tank, renewed connection on yellow coil wire and hey she’s running good but not starting on the start button. Starter is whirring but not engaging with engine. Removed alternator cover and rotor and starter wheel spinning on shaft, bolt on the crankshaft end completely loose. Thing is they were never removed from crankshaft when the engine was stripped, nevertheless should have taken the torque wrench to it and checked it was tight. All torqued up now and ready for another spin round the block on a dry day. This is exactly why I am keen to get going to iron out all gremlins before that sunny spring day. “Happy Days” 😃😃

[Nurse Julie]

Thanks Julie for posting pics! It is still a bit of a mystery to me, the only thing I can come up with is that the stopper plate is not the correct one for the bike. The main thing is she moves nicely through the gears.

As long as she is a good mover in the gearbox dept. that's all that matters. Just read your other post on the teething issues, this is the benefit of finishing a build in the winter. All the issues will be sorted ready for the good weather.