Author Topic: 1977 cb750f2 (915cc)  (Read 240680 times)

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Offline rickmoore24

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Re: 1977 cb750f2 915cc in.
« Reply #550 on: October 19, 2011, 03:34:22 PM »
Thanks for the explanation tweakin, that'll help me when I swap in my 836cc I'm building for Lucy. Also, not to stray off subject, but what kind of setup do you have wrapped up in the Da'Kine bag back there??   :))
1972 CB750 K2 (Daily Runner)
1972 CB750 K2 (Sold)
1973 CB750 K3 (Hardtail 836cc)
1998 CBR F3 - R.I.P., went down on the 101 in Calabasas, Ca.
1995 EG6

Offline tweakin

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Re: 1977 cb750f2 915cc in.
« Reply #551 on: October 19, 2011, 07:41:30 PM »
Its and older Channel islands longboard.  I think it was called te M8.  Havent been out on it too much lately.  Good luck with the 836 swap.

Offline oldhondarider

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Re: 1977 cb750f2 915cc in.
« Reply #552 on: October 19, 2011, 09:10:59 PM »
Its and older Channel islands longboard.  I think it was called te M8.  Havent been out on it too much lately.  Good luck with the 836 swap.

smells like a Westport trip!!!!!
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Offline rickmoore24

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Re: 1977 cb750f2 915cc in.
« Reply #553 on: October 20, 2011, 07:09:57 AM »
Al Merrick shapes are all time! Thanks.
1972 CB750 K2 (Daily Runner)
1972 CB750 K2 (Sold)
1973 CB750 K3 (Hardtail 836cc)
1998 CBR F3 - R.I.P., went down on the 101 in Calabasas, Ca.
1995 EG6

Offline jgmmgood

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Re: 1977 cb750f2 915cc in.
« Reply #554 on: October 20, 2011, 11:55:26 AM »
Sir,

Very nice project indeed. 
Just to chime in on the Glyptal discussion albeit a little late, this stuff is pretty much industry standard in coating generator windings and has been since the 60's?  I would say if it can stand up to the constant stresses in that environment for an extended time, it should be more than useful for inner case coating. 
Lookin' is for free, Touchin's gonna cost ya sumthin - Chaz Michael Michaels.

Offline Lunchbox

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Re: 1977 cb750f2 915cc in.
« Reply #555 on: October 26, 2011, 09:37:01 AM »
Really nice work on the bike. Congrats!

Question on the cafe seat- did you make it or was it a purchase? I've seen similar ones but none with the back exposed where you mounted your tail light.

Offline tweakin

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Re: 1977 cb750f2 915cc in.
« Reply #556 on: October 26, 2011, 07:23:47 PM »
Thanks for checking out my build.  The seatpan is from airtech streamlining http://www.airtech-streamlining.com/vintage/vintageseats_round.htm.  I fabbed up a taillight mount bracket to fit up unter the tail section.
Really nice work on the bike. Congrats!

Question on the cafe seat- did you make it or was it a purchase? I've seen similar ones but none with the back exposed where you mounted your tail light.

Offline tweakin

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Re: 1977 cb750f2 915cc in.
« Reply #557 on: November 03, 2011, 12:29:51 PM »
Some minor updates.  I was able to get the cam degreed with the help of a friend and a second set of eyes.  While I have the bike torn apart I decided to do some clean up of the wiring and ship off my tins to Nvr2old for some fresh paint.






« Last Edit: November 03, 2011, 12:35:05 PM by tweakin »

Offline Tintop

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Re: 1977 cb750f2 915cc in.
« Reply #558 on: November 03, 2011, 03:40:25 PM »
Looking very clean and sanitary tweakin.  Are you going to be changing your paint scheme?
1977 CB550/4 Cafe - Speed Warrior / BOTM 03/11
1980 CB750F (project)
Whittaker GBF Vintage Racing Sidecar (XS750 power) - ITG / 151's / CMR Racing Products (SOLD)
1976 CB400 SS - stock / BOTM 04/11 (SOLD)
1973 CB750 K - basket case (SOLD)
77 CB550 Cafe build
550/750 Filter Thread
Sidecar Rebuild Thread

Offline tweakin

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Re: 1977 cb750f2 915cc in.
« Reply #559 on: November 03, 2011, 07:27:37 PM »
Yes TT, I am having member Nvr2old (www.meticulouspaint.com) redo the paint scheme for me.  The initial paint job looked good but it was a "garage job" and I felt like it never did the rest of my build justice.  I had a few opportunities to meet Larry and see his work in person an knew he was the person I wanted spraying my bike.

Looking very clean and sanitary tweakin.  Are you going to be changing your paint scheme?

Offline Retro Rocket

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Re: 1977 cb750f2 915cc in.
« Reply #560 on: November 03, 2011, 08:05:06 PM »
Same colors.?
750 K2 1000cc
750 F1 970cc
750 Bitsa 900cc
If You can't fix it with a hammer, You've got an electrical problem.

Offline brandEn

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Re: 1977 cb750f2 915cc in.
« Reply #561 on: November 03, 2011, 08:21:24 PM »
Same colors.?

tweaks being all secret and stuff, he won't even tell me... guess we will all have to wait for an "unveil" haha

Offline tweakin

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1977 cb750f2 915cc in.
« Reply #562 on: November 03, 2011, 08:40:48 PM »
The paint will be similar in colors to what it is now just a bit different.   I am giving Larry some artistic freedom with the paint so I am still not 100% sure on what the finished product will be.  Nothing extreme.

Offline tweakin

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Re: 1977 cb750f2 915cc in.
« Reply #563 on: November 12, 2011, 06:30:15 AM »
Small update:  I fired up the new engine last night and it took off after the second kick.  Only issue is the #2 cylinder is not firing.  I have narrowed it down to the carbs, the dyna 200 ignition is all good.  #2 is getting fuel but still not firing, so today i will take the carbs off and check the float needle retainer clip direction AND the movement/float height of the carbs. I will also thoroughly clean all those moving parts as well as the idle circuit fuel/air passages.

Even running on 3 cylinders it sounds like a beast.

Offline CBJoe

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Re: 1977 cb750f2 915 fired
« Reply #564 on: November 12, 2011, 07:11:01 AM »
This may be a silly question, but what exactly was used to coat the inside of the cases?  I was always under the impression that you didn't coat the insides of the cases with anything  :o

cheers, Joe
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Offline tweakin

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Re: 1977 cb750f2 915 fired
« Reply #565 on: November 12, 2011, 07:14:15 AM »
This may be a silly question, but what exactly was used to coat the inside of the cases?  I was always under the impression that you didn't coat the insides of the cases with anything  :o

cheers, Joe
The only reason the question is silly is because it was all discussed a few pages back, lol...

Question..
What is the red paint inside the engine cases and will it stay on under the heat and hot oil?

Thanks.

Your eyes are good WR.  The red coating is Glyptal.

http://www.eastwood.com/glyptal-red-brush-on-1-qt.html?srccode=mn130060

Multi-Purpose Glyptal® Red Enamel seals uneven surfaces in engine castings to improve oil circulation

Glyptal 1201 seals the rough interior castings of engine blocks to help prevent engine damage. Sealing the tiny pores left in metal after bead blasting leaves the engine block interior smooth and clean, and that helps keep oil clean and flowing freely.

Acid- and oil-resistant
Also resists moisture, heat dust, salt spray
Anti-corrosion protection

Are my eyes playing tricks, or did you paint the inside of the engine cases too??

Can't wait to see the engine go together!! :)

One page back this was discussed.  It is Glyptal and is specially made for the inside of cases and other engine parts.  Been used for years.

Offline FunJimmy

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Re: 1977 cb750f2 915 fired
« Reply #566 on: November 12, 2011, 07:54:07 AM »
Wow Tige,

You've really been cranking out the hours on the rebiuld.
Can't wait to hear it in person.

BTW, did you paint the inside of the cases? LOL!

Cheers
FJ
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Offline Doctor_D

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Re: 1977 cb750f2 915cc in.
« Reply #567 on: November 12, 2011, 08:07:35 AM »
Small update:  I fired up the new engine last night and it took off after the second kick.  Only issue is the #2 cylinder is not firing.  I have narrowed it down to the carbs, the dyna 200 ignition is all good.  #2 is getting fuel but still not firing, so today i will take the carbs off and check the float needle retainer clip direction AND the movement/float height of the carbs. I will also thoroughly clean all those moving parts as well as the idle circuit fuel/air passages.

Even running on 3 cylinders it sounds like a beast.

It seems you got some troubleshooting advice. If it irons out the issue, I may be in business as well.  Best of luck.
Take care,
David
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1975 CB 750F - Project page: http://forums.sohc4.net/index.php?topic=66026.msg725479#msg725479
1978 CX500
1971 Norton Commando

Offline tweakin

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Re: 1977 cb750f2 915 fired
« Reply #568 on: November 12, 2011, 01:29:44 PM »
Yes Jim, it is glyptal and is specifically designed to treat the inside of engine cases ect.  Read above.

Wow Tige,

You've really been cranking out the hours on the rebiuld.
Can't wait to hear it in person.

BTW, did you paint the inside of the cases? LOL!

Cheers
FJ

Offline tweakin

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Re: 1977 cb750f2 915 video
« Reply #569 on: November 12, 2011, 03:22:29 PM »
I think I got everything ironed out with the carbs.  They are still not completely tuned but all 4 are firing.

cb750 with 915 kit

Offline Retro Rocket

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Re: 1977 cb750f2 915 video
« Reply #570 on: November 12, 2011, 03:56:14 PM »
I commented in your other thread mate but that sounds real good..... ;) I also mentioned that Brian {tintop} should make us a filter for these carbs.... ;D ;)
750 K2 1000cc
750 F1 970cc
750 Bitsa 900cc
If You can't fix it with a hammer, You've got an electrical problem.

Offline Jerry Rxman Griffin aka MuthaF'er

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Re: 1977 cb750f2 915 video
« Reply #571 on: November 12, 2011, 04:09:14 PM »
Sounds wicked!
As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline tweakin

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Re: 1977 cb750f2 915 video
« Reply #572 on: November 13, 2011, 06:18:30 AM »
It does sound pretty mean.  A bit more aggressive sounding than the previous 836.
Sounds wicked!

Offline Freaky1

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Re: 1977 cb750f2 915 video
« Reply #573 on: November 13, 2011, 06:41:05 AM »
It does sound pretty mean.  A bit more aggressive sounding than the previous 836.
Sounds wicked!

Just a bit!  ;D
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Offline andy750

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Re: 1977 cb750f2 915 video
« Reply #574 on: November 13, 2011, 06:52:42 PM »
Wow sounds great!! Your bike looks amazing as well. Well done on a super-fast rebuild.

Are you planning on putting this on the dyno?

Current bikes
1. CB750K4: Long distance bike, 17 countries and counting...2001 - Trans-USA-Mexico, 2003 - European Tour, 2004 - SOHC Easy Rider Trip , 2008 - Adirondack Tour 2-up , 2013 - Tail of the Dragon Tour , 2017: 836 kit install and bottom end rebuild. And rebirth: http://forums.sohc4.net/index.php/topic,173213.msg2029836.html#msg2029836
2. CB750/810cc K2  - road racer with JMR worked head 71 hp
3. Yamaha Tenere T700 2022

Where did you go on your bike today? - http://forums.sohc4.net/index.php?topic=45183.2350