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Stelvio shakedown.......
Vasco DG:
Late last year a customer bought in his Stelvio. Long story short it was comprehensively 'Donald Ducked' by the addition of a pair of those bloody O2 sensor foolers. Anyway, I got the go ahead to start fixing it so over the Christmas break when most people were on holiday I started reducing it to this.
Anyway Erika came down and took a shitload of pics but I'm having trouble uploading them to Flickr but when I do I'll add them.
Motor has been broken down into its main components.
Well today Mark Foster who posts here as 'Oldtime' came over with his bore measuring kit.
After he'd scattered it all over the shop by dropping its ancient wooden box, (It's German. Crap. No wonder it broke! ;D) we were amazed to find that although the lip in the top of the bore *Felt* a lot bigger it only measured at 0.01! Bore wasn't ovalised and a quick scrub with some wet'n'dry to remove the carbon showed that they'll be perfectly fine to go round again! Bonus! Pistons, (Pics later.) are also perfect, they've even still got the Teflon coating on the skirts! Same can't be said for the rings unfortunately. 100 thou end gap is, err?? A little bit excessive.
Sump was full of nasties!
Nastiest thing was the ca chains though. The diluted oil had failed to lubricate the pins adequately and the chains were horribly worn. Even though I tried hand pumping the tensioners and spinning the motor on the starter after installing the roller top end it was to no avail. As soon as it fired it jumped three teeth and bye-bye valves! Well, can't say I didn't try :D. The difference between the length of the 'Old' chain and a new one is obvious when they are hung side by side!
Took out one rod to check the big end shells. More good luck. Shells are perfect. I ain't replacing these!
Mor later.
lucky phil:
Hey Pete did you get the dimensions and thread dia and pitch off the valve adjusters?
Ciao
Vasco DG:
Nah, sorry, I'll do that tomorrow and PM you. If I forget, well, y'know? Nag! :D
Vasco DG:
Just a question? Is anybody interested in this stuff? Fine if you're not, I don't expect any sort of slavish gratitude or anything but if nobody's interested I won't bother as it does take time. I just thought that it would be interesting. If it's not I won't waste my time.
Pete
lucky phil:
--- Quote from: Vasco DG on January 06, 2015, 05:00:25 AM ---Just a question? Is anybody interested in this stuff? Fine if you're not, I don't expect any sort of slavish gratitude or anything but if nobody's interested I won't bother as it does take time. I just thought that it would be interesting. If it's not I won't waste my time.
Pete
--- End quote ---
I'm always interested in this stuff Pete. Same as I keep all my old workshop manuals etc.
Even though I may not ever own some of these bikes/engines its all good interesting engineering information.
I love seeing various engineering solutions and approaches to similar design criterior.
Ciao
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