The BSA cam is steel, they've made a very heavy jig and TIG welded it.
The Megacycle cams in the pic look to be CI, they say "two lobes have been moved and hard welded in the new position".
The only "hard welding" I know about wouldn't be used to weld a shaft together, it'd be used to build up a lobe for re-grinding.
Go soothingly on the grease mud, as there lurks the skid demon
Bummer, I expected the oldhams to be "relatively" straight forward.
Mr Bogan, do you reckon you can manage the idea Ocean1 has mentioned here? If so, I may have to send some cams your way
Will get the measurements next week, still 450km away from the bike![]()
Don't quote me on this yet, but I think the ZX6/ZZR runs a hollow cam, but not for oil like Hondas of the era. This, to my noob head, seems like a good idea.
I found those links last night after much trawling. I may be getting a little obsessed with this...
Cheers Stephen
I... errr... have no idea what these diagrams are, moar google for me!
Edit:
I really like the simplicity of Ocean1s idea, I think I'll have to get the measurements done, then look at it
The biggest issue I'm seeing here is I need to cut it where the locating ring is on the exh cam.
Will have to see how much clearance there is and if the sleeve can be made with the raised thingy in it
This shows the bit I'm waffling about http://img91.imageshack.us/img91/3116/dscf0891.jpg
The intake side has it on the gap between 1 & 2, so no issue there
"A shark on whiskey is mighty risky, but a shark on beer is a beer engineer" - Tad Ghostal
I don't like buying things![]()
Hopefully this link works
https://www.dropbox.com/s/g28bx6hollmo9pj/02.jpg has the journal specs
Go soothingly on the grease mud, as there lurks the skid demon
Go soothingly on the grease mud, as there lurks the skid demon
What about modifying the locating groove? It's only on the oil feed and is a separate arm, there's no locating groove for the cam on the head. It could possibly be machine to accommodate a press fit sleeve with a locating ring machined on it?
Or cut the locating groove thingy off and have another made that is bolted to the oil feed gear
Cut, bore both pieces using a travelling steady to hold the long piece. The cam is hollow simply to save weight - the insert doesn't need to be anything clever, mild steel will do, and it'll silver solder too. Pin it as well. The load, while interupted, isn't actually that great - i'd point out the huge number of cam sprockets which have been slotted and are held in place very effectively with two 6mm screws...
i disagree with the cost of failure...which ever cam breaks, the short end is going to stop with valves closed IMO...may be lucky and have no valve damage at all...If this actually works though, I'd not give a lot for the cush drive's chances in the back of the clutch.
Right you are gov'nor, see pic. Edit: you'd want to machine the shaft OD first.
With Easyflow or similar you'd make most of the length of the joint about 0.05mm clearance, with perhaps the centre 4mm of the pin size for size. Tin the pin and cam bores, lay it into a simple jig to keep it aligned and timed, heat it up to about 650c and push the lot firmly together. As long as the surfaces are tinned properly that won't move, but it takes a mere 10 minutes to cross drill and ream the assembly and fit taper pins.
Editedit: You could probably use the same technique with the appropriate loctite instead of solder.
Go soothingly on the grease mud, as there lurks the skid demon
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