Author Topic: 1977 cb750f2 (915cc)  (Read 240547 times)

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Offline tweakin

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Re: 1977 cb750f2 (915cc)
« Reply #725 on: March 09, 2012, 06:08:13 AM »
Immortal.  thanks for checking out my thread.

Godffey.  Means a lot to me to have your seal of approval man, you have built some amazing bikes.

messeduptriple.   Thanks, this forum and its members have made this build possible.  Some great members here with years of experience and advice.
Wow...I only wish I knew how to tear apart an engine and do a build like that. Great work and awesome bike!!!

Sent from my PC36100 using Tapatalk
« Last Edit: April 14, 2012, 05:18:48 PM by tweakin »

Offline tweakin

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Re: 1977 cb750f2 Ride Video
« Reply #726 on: April 14, 2012, 05:14:25 PM »
Today was a great spring day in the PNW, 60 degrees and no rain in sight.  I was able to break away from the family and get 50 "break in" miles on the 915 build and even got the Harley out for a bit.  I was concerned after having to split the cases to fix the shifting issue but no leaks at all and it ran like a beast.  The absorbant pad under the bike is an old one from the last oil change.





The 915 is a rocket compared to my Harley with  built engine and a hell of a lot more fun... ;D, but the Harley is great around town.

I am looking forward to getting the 78 c750f built up with the 836 so I can compare it to the 915.
« Last Edit: April 14, 2012, 05:19:44 PM by tweakin »

Offline FunJimmy

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Re: 1977 cb750f2 (915cc)
« Reply #727 on: April 14, 2012, 06:13:28 PM »
Big grins for you.  ;D ;D

Glad you had a free day to rip.
You never see a motorcycle parked outside of a psychiatrist's office!

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Offline andy750

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Re: 1977 cb750f2 (915cc)
« Reply #728 on: April 15, 2012, 05:51:45 AM »
Sounds like you had a great day! The 915 just looks so tall compared to the Harley and looks like it wants to go fast. Definitely a "hooligan bike" ;)

Have fun with it! Amazing build.

cheers
Andy
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

Offline tweakin

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Re: 1977 cb750f2 (915cc)
« Reply #729 on: April 15, 2012, 10:59:05 AM »
Yes Andy the 915 is way taller than the Harley and a total different ride.  I guess thats what makes it fun to still have in the shop.  The difficult thing is remembering when I am on the Harley, it cant lean...  And when on the cb, that it can lean.
Sounds like you had a great day! The 915 just looks so tall compared to the Harley and looks like it wants to go fast. Definitely a "hooligan bike" ;)

Have fun with it! Amazing build.

cheers
Andy

Offline Greggo

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Re: 1977 cb750f2 (915cc)
« Reply #730 on: April 16, 2012, 04:02:48 PM »
That Harley is sweet!  Not a fan of how most of them get customized, but that one looks great.  What model is that?

Offline tweakin

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Re: 1977 cb750f2 (915cc)
« Reply #731 on: April 16, 2012, 05:35:52 PM »
That Harley is sweet!  Not a fan of how most of them get customized, but that one looks great.  What model is that?
Thanks Greggo.   It is a 2009 Streetbob.

Offline MasterChief750

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Re: 1977 cb750f2 (915cc)
« Reply #732 on: April 16, 2012, 05:53:45 PM »
crazy i guess right, thought it looked like a dyna streetbob, not a fan of many harleys but my buddy has the street bob, really like what you did with yours
1978 CB750 K - Project Red Headed Step Child
1976 CB750 K - Drag Bike
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Offline robertcoupe01

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Re: 1977 cb750f2 (915cc)
« Reply #733 on: May 05, 2012, 01:47:31 PM »
I registered at this forum because of your build.
your bike is 1 of the cleanest 750's I have ever seen.
I am most impressed by your rearsets and rear brake upgrade,

I am hoping you could put me in contact with the guy who helped you with the brackets and linkage for your rearsets, and if you still remember the part numbers for the brake upgrades.

Offline tweakin

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Re: 1977 cb750f2 (915cc)
« Reply #734 on: May 06, 2012, 07:06:24 AM »
Thanks for taking the time to check out my build and for joining one o the best forums on the net.

I replied to your message with some info on the rearsets.
I registered at this forum because of your build.
your bike is 1 of the cleanest 750's I have ever seen.
I am most impressed by your rearsets and rear brake upgrade,

I am hoping you could put me in contact with the guy who helped you with the brackets and linkage for your rearsets, and if you still remember the part numbers for the brake upgrades.

Offline scroggins5000

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Re: 1977 cb750f2 (915cc)
« Reply #735 on: May 06, 2012, 10:49:27 AM »
Thanks for taking the time to check out my build and for joining one o the best forums on the net.

I replied to your message with some info on the rearsets.

Tweakin, can you forward me that info too. I'm weighing my options on what to do with the rearsets on my bike. I didn't plan well, so I'm back to square one. What you did on your bike is definitely one of the best looking, and one of the only direct bolt on set ups I've even seen for a 77-78F.

Offline tweakin

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Re: 1977 cb750f2 (915cc)
« Reply #736 on: May 06, 2012, 09:00:04 PM »
Scroggins, pm sent. 

Offline Godffery

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Re: 1977 cb750f2 (915cc)
« Reply #737 on: May 07, 2012, 07:44:29 AM »

Offline robertcoupe01

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Re: 1977 cb750f2 (915cc)
« Reply #738 on: May 08, 2012, 08:29:58 PM »
is it me, or does the shaft for the rear master cylinder look like its being stressed?
is the picture not showing it right?

because I'm wondering if there is any binding from the housing being solid mounted, and the brake pedal having a small circular movement when driving the ram into the master cylinder.




Offline tweakin

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Re: 1977 cb750f2 (915cc)
« Reply #739 on: May 08, 2012, 08:48:51 PM »
Robert there is a bit of an angle from the mounting position, but I can assure you no binding.  The rod is free floating, can be pulled directly out, that is why the spring is next to it to add tension to keep the rod from coming free.  The rod is not connected to but rather just acts to push on the master cylinders plunger... ;)  There is a significant amount of angle to play with.
is it me, or does the shaft for the rear master cylinder look like its being stressed?
is the picture not showing it right?

because I'm wondering if there is any binding from the housing being solid mounted, and the brake pedal having a small circular movement when driving the ram into the master cylinder.


Offline tweakin

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Re: 1977 cb750f2 (915cc)
« Reply #740 on: May 08, 2012, 08:50:54 PM »
On another note, today I got the timing adjusted, valve lash checked/set and ready for the dyno this Saturday.   ;D

Offline kap384@telus.net

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Re: 1977 cb750f2 (915cc)
« Reply #741 on: May 09, 2012, 08:04:04 AM »







Never get tired of looking at your bike tweakin!
1965 Honda CB450K0
1972 Honda CT70K1
1975 Honda MR50
1975 Honda CB400F Supersport
1977 Honda CB750F2 Supersport
1978 Honda XL100
1979 Honda CBX Supersport
1982 Honda VF750S Sabre - Adventure Bike modified
1983 Honda CX650T
1995 Honda VFR750
2016 Honda CRF1000L Africa Twin
2015 KTM 200 XC-W
1963 Suzuki T10
My 1977 CB750F restoration - http://forums.sohc4.net/index.php?topic=66779.0
My 1975 CB400F restoration -
http://forums.sohc4.net/index.php?topic=145196.msg1651779#msg1651779
'More Stock Than Not' thread - http://forums.sohc4.net/index.php?topic=90807.500
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Offline andy750

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Re: 1977 cb750f2 (915cc)
« Reply #742 on: May 09, 2012, 09:26:38 AM »

Never get tired of looking at your bike tweakin!

+1. Good luck with 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

Offline MCRider

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Re: 1977 cb750f2 (915cc)
« Reply #743 on: May 09, 2012, 10:17:29 AM »

Never get tired of looking at your bike tweakin!

+1. Good luck with the dyno!!
That's for sure, on both accounts.
Ride Safe:
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1988 NT650 HawkGT;  1978 CB400 Hawk;  1975 CB750F -Free Bird; 1968 CB77 Super Hawk -Ticker;  Phaedrus 1972 CB750K2- Build Thread
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Offline tweakin

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Re: 1977 cb750f2 (915cc)
« Reply #744 on: May 09, 2012, 05:52:28 PM »
Thanks gentlemen.  I hope to have a good report and video after the weekend...

Offline FunJimmy

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Re: 1977 cb750f2 (915cc)
« Reply #745 on: May 09, 2012, 07:39:29 PM »
On another note, today I got the timing adjusted, valve lash checked/set and ready for the dyno this Saturday.   ;D

Looking forward to your comments re: dyno tuning as I'll be next.

FJ
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Offline tweakin

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Re: 1977 cb750f2 (915cc)DYNO RUN
« Reply #746 on: May 12, 2012, 03:30:04 PM »
1977 cb750f
915cc
APE crank
Stage three head with 5mm conversion
Dyna 2000 @32* advance
RS34 carbs, 127.5 mains

Thanks to Doctor D and Tower at Twineline...  Still need to work out a sticky accelerator pump, but other than that its great.
I am sure there is more power hiding in there but I am happy with the K&N filters and Yamiya pipe.  Rips on the steet ;D

cb750f, 915cc Dyno run at Twineline Seattle







After the dyno tune, had a great day riding with brandEn...

Offline Retro Rocket

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Re: 1977 cb750f2 (915cc)DYNO RUN
« Reply #747 on: May 12, 2012, 03:44:18 PM »
Sounds gorgeous.... ;) Not bad numbers either mate, i've recently been told that you need someone who really knows the Mikuni's to set them up right but once right, they are the shizzle..... I wonder if Mike Rieck has some input on that..?
750 K2 1000cc
750 F1 970cc
750 Bitsa 900cc
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Offline Jerry Rxman Griffin aka MuthaF'er

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Re: 1977 cb750f2 (915cc)DYNO RUN
« Reply #748 on: May 12, 2012, 05:28:56 PM »
Nice!
As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline cheapride

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Re: 1977 cb750f2 (915cc)DYNO RUN
« Reply #749 on: May 12, 2012, 06:22:14 PM »
Great job.  Your bike helped me with mine in so many ways.  Just Awesome...


1978 cb750f Supersport