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How fit clutch without special tool
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350biker
United Kingdom
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November 8, 2017 - 8:43 am
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Thanks Mike for the pictures of the various types of compressor available. I too have the original cast MCA type which is the equivalent of the factory one shown as Type 3. I remember making a Type 3 in Model Engineering Club at grammar school in 1965 for my first bike, a 1956 D3 swinging arm 150cc. My original question relates to the fitting of a compressor when using an endless primary drive chain. Do either of type 1 or 2 have thin enough "feet" to go between the chain and the clutch basket or is there any position where they will fit beyond the chain and not foul the crankcase? I cant seem to get the MCA one in anywhere if the chain is in position.

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mike p5xbx
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November 8, 2017 - 4:33 pm
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it should do although it is a bit tight on the leg that has to pass the chain
( google photo not mine)

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D? - D10- D14 Bantams 350 AJS -500 Triumph http://bsanotru.....lfire.com/

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Mags 1
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November 11, 2017 - 9:33 pm
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Decided to make one to see how long it took and also whether it was a paying proposition, very unlikely I thought before even starting...

Finished product must be basically same dimensions at least or it won't even fit, let alone work.

Decent strong materials and enough time must be allowed or it's a waste.

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What I was attempting to emulate.

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I'm not a very good weldor, but I got it to fit an old clutch drum

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Finished product, which took about three hours!

Cutting metal, grinding, welding, cleaning up, threading, drilling, all takes time, plus constant comparing with model etc.

It was just an exercise I suppose, but if I'd had the jigs and fixtures that MAC must have had at the time, I'd be able to be doing many dozens a day.

@ £5 an hour not counting materials or electricity etc, I can plainly see just how we can no longer compete with the likes of up and coming industrial giants overseas.

Four now on the road and at least several in bits.

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cocorico
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November 12, 2017 - 7:54 am
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Your point is valid - but with a reasonable workshop at your disposal, together with suitable offcuts of metal (where did you get the 'bell' from?), 3 hours work is better than a few days wait for delivery.

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Mags 1
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November 12, 2017 - 4:56 pm
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I believe they're off a lawnmower of some sort, perhaps a rough sort of wheel bearing cup or whatever.

I may make a few more and try selling them on the bay, but I haven't a stripped engine to test first one out on yet, we'll see, but it'll give me something to do over the Winter maybe.

Thanks for your interest in my project.

Four now on the road and at least several in bits.

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350biker
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November 12, 2017 - 8:02 pm
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Mags 1 - well done with making your own clutch compressor. Do you think you could make the feet thin enough to cope with the extra thickness of a primary chain to allow the use of an endless primary chain?

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Mags 1
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November 13, 2017 - 6:59 pm
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350biker said
Mags 1 - well done with making your own clutch compressor. Do you think you could make the feet thin enough to cope with the extra thickness of a primary chain to allow the use of an endless primary chain?  

Hello, yes, I know what you mean exactly, having felt rather pleased at being able to use up some lengths of right type of primary chain myself, making them endless rather than but split links.

Problems arose when I needed to get to fit the forgotten many holed big washer behind the starter quadrant, getting the crank sprocket off was a long job as it seemed to be welded on somehow.

Making the 'feet' of the puller thin enough to get between clutch body and chain will probably weaken it to the extent that it'll damage or ruin the tool, but I'm willing to have a go, it's only a matter of welding new feet on if the worst happens.

I used some already formed 1/2 inch by 1/2 inch angle of thick section.

Four now on the road and at least several in bits.

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