Author Topic: 1978 CB750f progress...  (Read 2051 times)

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snickram

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1978 CB750f progress...
« on: January 12, 2007, 04:46:53 PM »
rims

snickram

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Re: 1978 CB750f progress...
« Reply #1 on: January 12, 2007, 04:49:43 PM »
rim

snickram

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Re: 1978 CB750f progress...
« Reply #2 on: January 12, 2007, 04:52:17 PM »
Pontiac rally rim paint and a lot of sanding, not done yet...

snickram

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Re: 1978 CB750f progress...
« Reply #3 on: January 12, 2007, 04:54:55 PM »
finished parts

snickram

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Re: 1978 CB750f progress...
« Reply #4 on: January 12, 2007, 04:55:59 PM »
sanded the ugly gold off the emblems...  I likey silver  ;D

Offline Hockers Choppers

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Re: 1978 CB750f progress...
« Reply #5 on: January 12, 2007, 05:27:28 PM »
Hey, that looks just like my shop. I have a 78 ss scattered all over too!! Doing any engine mods? The wheel look badass! My bike is totally apart right now down to every last bolt and nut. I have the bottom end of the engine together and painted! I'm waiting for my engine parts, big bore, gaskets, valve guides, head studs, etc. I'd like to put it together, but I want to put the engine in the bare frame and then set it on the stand. OR I should say put the frame on the engine. That is one heavy sob of an engine!!! Everything is painted, cleaned and ready to install, just need the damn engine together! What are you running for carbs? I have the stock ones and pods. I have to raise the needles with some nylon washers and went to 125 mains, but I think the pilots are too small also, I thought of drilling them out a size?
Jesse in Kansas
The thing about common sense is that, it's not that common.

1978 CB750F SUPERSPORT 850cc, cam, porting, dyna ign, cr29's lotsa elbow grease and $$'s. Worth ever penny!!  (S0ld)

05 VTX1800F darkside
cb750 k1

Offline eurban

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Re: 1978 CB750f progress...
« Reply #6 on: January 12, 2007, 07:23:36 PM »
Hockers-
My project is an 78K with an cammed 836 motor and Pods.  I made the mistake of thinking that bigger was better on the idle jets and drilled the stock #35s to an aproximate #40 size.  After actually testing the bike out properly I have returned to the stock #35s and am actually happiest at a bit over one full turn out on the idle jets.  The pressed in idle jets are easily clogged so make sure that yours are clean (by actually removing them and cleaning them) before you decide that you need to drill them.  Also make sure your accelerator pump is properly working as these carbs require it for proper performance.  For the main jet needles, I located a set of new ones from David Silver Spares specced for the 77 models which have the multiple clip positions  These also came with a new needle jet (the bushing that the needle fits into) which made me happy since I worry about the ill effects of wear on these precise fit type of parts.  I had been using small electronics washers to shim the needles but the thickness of the washers was not quite precise enough for my liking.  Perhaps your nylon washers are more precisely made?  Good luck

Offline Hockers Choppers

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Re: 1978 CB750f progress...
« Reply #7 on: January 12, 2007, 10:18:06 PM »
Wow, someone has the same setup as me?? I didn't know the 77 had adjustable needles!cool!!!!! I did have my idle jets out and found little chunks of oring in the little passage from the jet to the air screw. got all that out but still have to turn out 3 turns. But that was with the stock engine. I don't have the new one together yet! accel pump works fine.  What mains do you run? Thanks, jesse
The thing about common sense is that, it's not that common.

1978 CB750F SUPERSPORT 850cc, cam, porting, dyna ign, cr29's lotsa elbow grease and $$'s. Worth ever penny!!  (S0ld)

05 VTX1800F darkside
cb750 k1

snickram

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Re: 1978 CB750f progress...
« Reply #8 on: January 13, 2007, 04:55:24 AM »
Hey, that looks just like my shop. I have a 78 ss scattered all over too!! Doing any engine mods? The wheel look badass! My bike is totally apart right now down to every last bolt and nut. I have the bottom end of the engine together and painted! I'm waiting for my engine parts, big bore, gaskets, valve guides, head studs, etc. I'd like to put it together, but I want to put the engine in the bare frame and then set it on the stand. OR I should say put the frame on the engine. That is one heavy sob of an engine!!! Everything is painted, cleaned and ready to install, just need the damn engine together! What are you running for carbs? I have the stock ones and pods. I have to raise the needles with some nylon washers and went to 125 mains, but I think the pilots are too small also, I thought of drilling them out a size?
Jesse in Kansas

   I carried my motor about 25 yards up 3 steps through the kitchen and down 12 steps into the basement.  What this means is eventually I'll be repeating the process..  To be honest I'm not accustomed to moving these things around, prior to this all I had was kawasaki H1 and H2's and these motors weren't bad at all.  Eventually I'll have another H1 or H2..  My dad and uncle once owned an H1 drag bike..  They put a 500 motor in it that they aquired from a bike that raced on the salt flats.  300mph motor...  That little 500 would tare a CB750 to bits, but with a big bore kit and some additional work the 500 could be beat.  However, this is a 500 were talking about... 
   I've yet to tare my engine apart, but I'm getting to that point..  It ran fine when I took it out, but ofcourse it had leaky gasket issues..  I'm going to put an 811 kit in it even though I'm completely new to this procedure.  I've tore an H1 motor all apart, but never a CB750..  I really don't feel to comfortable just yet, but when the time comes I'll just get-er-done..  Hope everything turns out well?  To be honest I've picked up a lot of knowledge from this board and I'm sure with ya'alls help I'll figure it out..   ;D         

Offline jtb

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Re: 1978 CB750f progress...
« Reply #9 on: January 13, 2007, 05:14:23 AM »
Snickram,  Pay close attention to your valve guides when you take it apart.  Ask me how I know :-\ :-\ :-\
1977 CB750F
1985 V65 Sabre
1986 VFR 750 (gone but missed greatly)

Offline Hockers Choppers

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Re: 1978 CB750f progress...
« Reply #10 on: January 13, 2007, 07:32:27 AM »
my f3 exhaust guides had like .030 play with 13,000 miles! But it did run fine. Started hard. I'm putting an earlier k head and cylinder with big bore and cam, springs, etc. The older heads are much better and you can get better retainers. Plus higher compression!

Those old 2 strokes would haul!!! I had an old 380 suzuki on a go kart when I was a kid. It would go 75 mph!!!!!
The thing about common sense is that, it's not that common.

1978 CB750F SUPERSPORT 850cc, cam, porting, dyna ign, cr29's lotsa elbow grease and $$'s. Worth ever penny!!  (S0ld)

05 VTX1800F darkside
cb750 k1

snickram

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Re: 1978 CB750f progress...
« Reply #11 on: January 13, 2007, 08:25:53 AM »
my f3 exhaust guides had like .030 play with 13,000 miles! But it did run fine. Started hard. I'm putting an earlier k head and cylinder with big bore and cam, springs, etc. The older heads are much better and you can get better retainers. Plus higher compression!

Those old 2 strokes would haul!!! I had an old 380 suzuki on a go kart when I was a kid. It would go 75 mph!!!!!

I just miss the smell of the exhaust   ::)