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Author Topic: CB750E build  (Read 1676 times)

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Offline preston

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CB750E build
« on: July 25, 2017, 04:27:41 PM »
 Have 2 engines in which to salvage parts to begin the build of this engine.
So far one set of cases have been helicoiled main bearing bolts ( good or bad?)
I've picked the best of both cylinders looking at the fins on how many are damaged.
The bores don't matter as I will be boring it for an 836cc kit.
Same with the heads choosing the best of 2.
 At this point the cases, cylinders and head have been bead blasted and ready to paint.
Decided to paint the main engine cast iron grey and powder coat the normal shiny things
in black chrome.
  Let's see if I can post pics of the work on the head, new to this site

   Preston
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Offline Jerry Rxman Griffin aka MuthaF'er

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Re: CB750E build
« Reply #1 on: July 25, 2017, 09:09:15 PM »
Port work looks good.
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As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline SOHC4 Cafe Racer Fan

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Re: CB750E build
« Reply #2 on: July 25, 2017, 10:35:34 PM »
Nice porting.
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Offline calj737

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Re: CB750E build
« Reply #3 on: July 26, 2017, 04:26:46 AM »
I'd have the head milled and jugs decked before painting to insure they're both flat! That will allow you to run an MLS gasket with confidence and avoid any dreaded oil leaks afterwards.
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"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline preston

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Re: CB750E build
« Reply #4 on: July 27, 2017, 11:39:31 AM »
 Finished painting the cases, cylinder, head and oil pan, after curing the paint
in the oven I checked both the head and cylinders for warpage with my machinist
24 inch straight edge and both are well within specs.
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Offline preston

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Re: CB750E build
« Reply #5 on: July 30, 2017, 03:41:30 PM »
  Well, the last 2 days were boring, just watching the boring
bar go down, then up, reset and do it again ( 30x/hole @0.010mm).
Amazing how much metal is removed to bore for the 836 kit.
So next will be honing to size.
 Pics-- starting first hole
          getting ready for the last pass
          left overs
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Offline preston

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Re: CB750E build
« Reply #6 on: July 30, 2017, 03:45:50 PM »
that should be 30 passes each cylinder at .1mm per pass
 here's all the swarf to clean up
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Offline RAFster122s

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Re: CB750E build
« Reply #7 on: July 30, 2017, 04:07:52 PM »
Enough aluminum to make homeade thermite in case you need to cut through something or burn out a stump.
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Offline Stev-o

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Re: CB750E build
« Reply #8 on: July 31, 2017, 07:25:14 AM »
Nice work.  That roast turkey on Thanksgiving will taste great!
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'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........
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