pete roper Posted June 4 Posted June 4 (edited) Michael has a very pretty Tenni in at the moment. I think it actually belongs to a member here, not sure though. Anyway it came to have a RAM clutch installed among other things. I can’t remember how far it’s travelled, certainly not very far but have a squizz at the flywheel! The first pic is just to show off Michael’s spiffy new crane! Makes working on things like this a doddle! This is the flywheel! As you can see it’s a real doozy of a crack! Tick-Tock Motherf*cker! Oh, and Michael used the board for advice on how to yank the engine out of the front. I’ve never done it that way so couldn’t advise so thanks for that V11 people Edited June 4 by pete roper 4 3
pete roper Posted June 4 Author Posted June 4 Oh, and it’s got a host of other issues. Forks need rebuilding, split and leaking hoses. Rear mainseal is popped, leaking Welch plug, it’s getting one of Chuck’s shift springs, a service etc. and of course Michael is loosing his shit because it’s peppered with incorrect and missing fosters and things so his OCD has gone into overdrive! 1 2
pete roper Posted June 4 Author Posted June 4 Doing a bit of reading in the single plate clutch thread I’m assuming this is ‘TenniTragic’s bike? It’s very pretty, but Michael and I would be interested to know who worked on it before……… There are some tell tales that are setting my Spidey Senses tingling…… 2
Paradiso Posted June 4 Posted June 4 That flywheel looks similar to mine, albeit in a more advanced state of disintegration. I put in the twin plate clutch, but have thought before that the flywheel is a fairly simple design and shape, and that another alternative repair might be to have the alloy flywheel remade in steel. You'd then have to have the original clutch plate relined. I've got no experience of his kind of fabrication. Would that be possible? 1
Lucky Phil Posted June 4 Posted June 4 (edited) 1 hour ago, pete roper said: Doing a bit of reading in the single plate clutch thread I’m assuming this is ‘TenniTragic’s bike? It’s very pretty, but Michael and I would be interested to know who worked on it before……… There are some tell tales that are setting my Spidey Senses tingling…… Is it cracked right through Pete on the front face where the big steel washer that sits under the bolt heads is? Edited June 4 by Lucky Phil 1
Chuck Posted June 4 Posted June 4 3 hours ago, Paradiso said: That flywheel looks similar to mine, albeit in a more advanced state of disintegration. I put in the twin plate clutch, but have thought before that the flywheel is a fairly simple design and shape, and that another alternative repair might be to have the alloy flywheel remade in steel. You'd then have to have the original clutch plate relined. I've got no experience of his kind of fabrication. Would that be possible? Sure, it's possible. You wouldn't want to pay for it, though. 1
pete roper Posted June 4 Author Posted June 4 4 hours ago, Lucky Phil said: Is it cracked right through Pete on the front face where the big steel washer that sits under the bolt heads is? Dunno, maybe not yet and I’m not going to waste time die testing it. It’s buggered. That’s all I need to know. 2
Pressureangle Posted June 4 Posted June 4 4 hours ago, Paradiso said: That flywheel looks similar to mine, albeit in a more advanced state of disintegration. I put in the twin plate clutch, but have thought before that the flywheel is a fairly simple design and shape, and that another alternative repair might be to have the alloy flywheel remade in steel. You'd then have to have the original clutch plate relined. I've got no experience of his kind of fabrication. Would that be possible? The piece itself is fairly simple to make, but as with all things the discovery of appropriate materials and dimensions takes time, and research time pays the same as machine time. I haven't seen a full picture of an alum flywheel but I'll assume the ring gear is steel and shrunk on; back in @Chuck's day it was common enough to install new ring gears when they wore out. So you wouldn't have to cut or source a new one, just calculate interference so it don't bust or fly off. 1
audiomick Posted June 4 Posted June 4 12 hours ago, pete roper said: ...Michael is loosing his shit because it’s peppered with incorrect and missing fosters and things so his OCD has gone into overdrive! It is slightly weird to read that. Matches me perfectly on all counts, except that I am not in Australia, so it can't be me. 1
Lucky Phil Posted June 4 Posted June 4 8 hours ago, Pressureangle said: The piece itself is fairly simple to make, but as with all things the discovery of appropriate materials and dimensions takes time, and research time pays the same as machine time. I haven't seen a full picture of an alum flywheel but I'll assume the ring gear is steel and shrunk on; back in @Chuck's day it was common enough to install new ring gears when they wore out. So you wouldn't have to cut or source a new one, just calculate interference so it don't bust or fly off. No need to get one made up you just use a genuine RAM clutch. They don't crack. The issue is and the reason I asked Pete the question I did was that I suspect the reason the single platers crack is because the big steel plate that the bolts go through and clamps on the face of the flywheel has a sharp edge to it around it's circumference and thats what initiates the cracking from a stress riser it creates. When I installed mine I bevelled that edge so it didn't bit into the flywheel face when the bolts were torqued up. Possible not a case of poor flywheel material. 3
pete roper Posted June 6 Author Posted June 6 OK, so we need some advice on the new RAM clutch. Well not so much the clutch, more it’s pushrod. The clutch has been supplied with a new pushrod that is much longer and narrower than the V11 rod. I’m thinking that it’s a rod for the five speed box but the indent in the central part of the plate in the clutch that it engages in is machined for a rod that diameter. So what’s the trick? You can’t cut the five speed rod down as its diameter will be wrong for the pushrod seals, (I assume? I’m going from memory.). So what’s the trick? Turn down the end of the V11 pushrod and re-harden it?
Lucky Phil Posted June 6 Posted June 6 Forgot to mention, thats a very nice crane there. Some more details and picks of that would be nice. I'd love a spacious shop as well someday. In the mean time I've retired my 48YO old career long toolbox for something new. Not very stand out, a bit stealth. Biggest drama will be remembering what tools are in what draw. 2 1
Paradiso Posted June 6 Posted June 6 I had the same issue with my Tenni when trying to fit a 5 speed clutch that was supplied as a 6 speed unit some years ago. I returned it. In hindsight, I suspect that the original clutch pushrod 'cup' (around 8mm diameter) could have been used with the 5 speed Ram clutch, which arrives ready assembled. Obviously, you would have to take the assembled unit apart to fit it. I never tried this or confirmed that it would work. This is a photo of the original Tenni clutch pushrod 'cup', which is branded Ram. Was this the solution you suggested Phil? 1
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