Balls

Information relating to the Matchless G80 or AJS Model 18 500cc Heavyweight.
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Balls

Postby mikeydpippin » Thu Jun 14, 2018 11:54 am

Almost finished me 63 G80 starts and runs well, clutch operates and gears select as it should but.......
If engine running and in gear with clutch lever in its very difficult to pull the bike backwards to reverse it.
All the other bikes had a Ball clutch part no. 040031 where’s this one didn’t also this one had 11 plates total and I’ve rebuilt with 9 total (4 of each and a friction plate).
I,m guessing without the ball the clutch doesn’t completely separate thus causing the problem.
Mike

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Re: Balls

Postby SPRIDDLER » Fri Jun 15, 2018 7:07 am

mikeydpippin wrote: I’ve rebuilt with 9 total (4 of each and a friction plate).

I'm not being pedantic, Mickeydrippin, but just to clarify and to avoid going off on a wild goose chase, do you mean 4 plain and 4 friction plates plus a pressure plate?
There should a ball at the kickstart end of the clutch thrust rod.
Last edited by SPRIDDLER on Fri Jun 15, 2018 7:22 am, edited 1 time in total.
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Re: Balls

Postby mikeydpippin » Fri Jun 15, 2018 7:21 am

Yes that’s correct Nev, I have a spares diagram but can’t upload at the moment, will try later.
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Re: Balls

Postby SPRIDDLER » Fri Jun 15, 2018 7:23 am

No need, I can view the archive docs.
There should be a ball at the kickstart end of the clutch thrust rod.
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Re: Balls

Postby mikeydpippin » Wed Jun 20, 2018 4:25 pm

There is a ball already fitted in front of the clutch pushrod, and I,m still getting the same problem ie.
Clutch and gears work fine, but with engine running clutch pulled in and bike in gear, the bikes very difficult to push backwards it’s like the clutch plates aren’t freeing.
Cable set with 1/8th free play, nuts holding clutch springs tightened to being level with clutch cover.
All thoughts appreciated.
Mike

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Re: Balls

Postby cbranni » Wed Jun 20, 2018 5:36 pm

Does it clunk or click when you engage first gear? does the bike want to move forward when in you engage first gear?.........this could be clutch drag, check clutch for opening square and opening enough to free the plates.

Where is the take up point on the lever when you move off? is it close to the handlebar or near the end of lever travel?........this could be clutch adjustment, adjust as per manual.

I have to ask...... if gearbox and clutch is working okay why not put it in neutral and push it back, maybe all our bikes are the same, at some point the rain will stop and I will check mine.

Colin
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Re: Balls

Postby Pharisee » Wed Jun 20, 2018 5:38 pm

mikeydpippin wrote:There is a ball already fitted in front of the clutch pushrod, and I,m still getting the same problem ie.
Clutch and gears work fine, but with engine running clutch pulled in and bike in gear, the bikes very difficult to push backwards it’s like the clutch plates aren’t freeing.
Cable set with 1/8th free play, nuts holding clutch springs tightened to being level with clutch cover.
All thoughts appreciated.


Check the movement of the pressure plate when you pull the clutch lever back to the handlebar. It should be approximately 1/8" (about 3 - 3.5mm). If you have that sort of movement, there would be nothing wrong with the actuation mechanism.

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Re: Balls

Postby raffles » Wed Jun 20, 2018 6:33 pm

Sounds like its the push rod that needs adjusting. Disconnect the cable,wind the push rod adjuster in until it goes tight then back it off one
turn refit the cable and adjust.
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Re: Balls

Postby Mick D » Thu Jun 21, 2018 6:42 am

raffles wrote:Disconnect the cable,wind the push rod adjuster in until it goes tight then back it off one turn refit the cable and adjust.


Hi

The literature advises backing off half a turn - a full turn will increase the probability of clutch drag.

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Re: Balls

Postby mikeydpippin » Thu Jul 12, 2018 8:19 pm

Decided to give up with this one and live with it hoping it will sort itself out.
New clutch plates and springs, clutch plates are opening and closing in the basket as they should 1/2 turn on adjuster ( clutch plates) and 1/8” free play on cable.
Gear changing as it should with no sudden jerk, even changed clutch lever.
Still the same problem, in gear with clutch lever pulled in, very difficult to reverse bike, I have to take out of gear to reverse.
All other bikes reverse without too much effort.
Mike

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