SOHC.co.uk Forums > CB750
750 K2 Strip & Rebuild - help please
Oddjob:
Personally I'd remove the upper rear hanger bolt, remove the spacer, then remove the paint from inside the frame at that point, fit the battery earth strap between the spacer and the frame even if that means shortening the spacer by a couple of mm. I wouldn't do the front hanger as it get's all sorts of stuff thrown at that part of the frame and you don't want to encourage rust.
Lobo:
Ah, cheers Ken, but it ain’t that simple as there’s no such spacer on the CB750 mounts.
I’ve gone with my plan A, and using a small Dremel 220 disc carefully removed only paint behind the bolt head … and used a spring washer there plus carbon conductive grease. It’s all invisible.
Tbh, I hadn’t thought of the crud / corrosion angle, but am now actually happier as this is a very visible and accessible area should rust ever start - which can only be from washing as the bike won’t be ridden in the wet.
I now rather pleased that the hidden inside of the rear frame has completely maintained its 2 pack integrity…. ‘serendipitous’ comes to mind 😀
Lobo:
A double win today…
(1) inserted a battery, and presto, ALL electrics worked immediately. Was pleasantly surprised by front brake pressure switch, as for some forgotten reason I was expecting trouble there.
(2) injected each tappet hole with 150cc of 20W50 Mineral, and the rest into the oil tank. Bunged 5cc down each plug hole, and foot cranked the motor a few times (plugs out). Then, via the starter cranked it, and after about 3*10 second engagements… bingo. Oil pressure light out… and back on at cessation. Bloody pleased… a good day.
Sat / Sun will be the exhausts back on, and then first start attempts.
McCabe-Thiele (Ted):
--- Quote from: Lobo on September 07, 2022, 12:11:15 PM ---Ah, cheers Ken, but it ain’t that simple as there’s no such spacer on the CB750 mounts.
I’ve gone with my plan A, and using a small Dremel 220 disc carefully removed only paint behind the bolt head … and used a spring washer there plus carbon conductive grease. It’s all invisible.
Tbh, I hadn’t thought of the crud / corrosion angle, but am now actually happier as this is a very visible and accessible area should rust ever start - which can only be from washing as the bike won’t be ridden in the wet.
I now rather pleased that the hidden inside of the rear frame has completely maintained its 2 pack integrity…. ‘serendipitous’ comes to mind 😀
--- End quote ---
Have you ever tried the waterless cleaner sprays? - they are surprisingly effective on cars so should be good on bikes as well.
Not to mention the new generation of waterless coolants for water cooled engines.
Lobo:
No Ted… I hadn’t even considered it! My greatest concern would be dragging any small grit particles across the paintwork - how does this ‘system’ avoid such damage?
And what the hell is waterless coolant 😂? Intrigued…
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