75 Mark III refurb/mod project
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Great pics, a great post and yet another excellent thread GP! I know it's not so convenient stopping to take photos when you're right into things. Do you have a computer in your shop?
Oh man, things sure took a turn for the worse. Just goes to show, we don't always know what we think we know about our engines. I had to go back to page 1 and here's a quote - "3. It will not be a total engine overhaul, just a beefed up top end job (bottom end is in great shape)"
It's a good thing you dug into it when you did. I wonder what shape the bearings are in.
Thanks a lot GP your extra efforts are much appreciated!
Oh man, things sure took a turn for the worse. Just goes to show, we don't always know what we think we know about our engines. I had to go back to page 1 and here's a quote - "3. It will not be a total engine overhaul, just a beefed up top end job (bottom end is in great shape)"
It's a good thing you dug into it when you did. I wonder what shape the bearings are in.
Thanks a lot GP your extra efforts are much appreciated!
grandpaul
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Righty-O, the bottom end was not in the plan. it is now! Since the top end was coming off, a cursory visual inspection of the bottom end was anticipated anyway, not like I was going to stuff it with rags and disregard it altogether.
My garage/shop/office is all one building, but it's like a maze. My camera is rather shopworn and greasy, but does the job under stress.
...just doing what I love to do...
My garage/shop/office is all one building, but it's like a maze. My camera is rather shopworn and greasy, but does the job under stress.
...just doing what I love to do...
grandpaul
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Okay, now for the botom end. Inside cover appearance backs up my suspicion that the bike was run with dirty oil and/or hot for a significant amount of time; it's all toasty black and discolored inside all the oily surfaces, as are all the oiled parts-
Unsteady photo doesn't show well, but you can see excess gasket sealer and loose camchain, some oil pump gear wear (not too bad)-
Sludgy residue; check out the oil dribble, like molasses-
Cam tensioner foot is only very lightly worn-
Unsteady photo doesn't show well, but you can see excess gasket sealer and loose camchain, some oil pump gear wear (not too bad)-
Sludgy residue; check out the oil dribble, like molasses-
Cam tensioner foot is only very lightly worn-
grandpaul
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A bit of simple deduction and a quick look in the other case half -
The sump strainer filter retaining circlip had somehow come loose, allowing the media retaining washer to escape. Apparently it was too large to be trapped by the magnet 'till it got folded up in the works.
Thankfully, the main journals are in good shape. Just a hint of wear on the left side, that will polish out-
Shells look like they did thier job, new ones will be straight replacements-
The sump strainer filter retaining circlip had somehow come loose, allowing the media retaining washer to escape. Apparently it was too large to be trapped by the magnet 'till it got folded up in the works.
Thankfully, the main journals are in good shape. Just a hint of wear on the left side, that will polish out-
Shells look like they did thier job, new ones will be straight replacements-
grandpaul
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More new stuff!
Kibblewhite racing vale spring kit with collets & retainers, all new crankshaft fastener hardware-
Rowe valves, "Superblend" main bearings, new camchain, Timing side cam bush-
Drive side cam bush, intake & exhaust valves, con rod bearing shells-
Kibblewhite racing vale spring kit with collets & retainers, all new crankshaft fastener hardware-
Rowe valves, "Superblend" main bearings, new camchain, Timing side cam bush-
Drive side cam bush, intake & exhaust valves, con rod bearing shells-
grandpaul
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Kinda kicking myself for not getting good "before" shots of the crankcases, both inside and out. I did get one close-up of the outsides after preliminary scrubbing, they had some sort of green boogers on 'em that was a real mother-in-law to get off-
The results (ironically, the shadows in this shot have a greenish hue)-
Custom fit yoke stem, turned to accept Norton head bearings, steering stops welded on (I need to go back and do this to my 880)-
Head & cylinders are at the machine shop along with pistons, rings, valves & spring kit, just waiting on the intake guide seals.
The results (ironically, the shadows in this shot have a greenish hue)-
Custom fit yoke stem, turned to accept Norton head bearings, steering stops welded on (I need to go back and do this to my 880)-
Head & cylinders are at the machine shop along with pistons, rings, valves & spring kit, just waiting on the intake guide seals.
N
nortonspeed
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The story of the inferior D-type rods sings around for some years now. Recently there was an publication in NOC magazine 'Roadholder' by John Dunn (technical advice team) telling us he covered over 80.000 mls with his D-type rods and advising us not to hurry changing these rods. Have you experienced yourself fracture of these rods? Or anybody else?
GP keep up the fine work!
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