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Author Topic: 1977 CB750F1 Project UK  (Read 4351 times)

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Offline SOHC4 Cafe Racer Fan

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Re: 1977 CB750F1 Project UK
« Reply #25 on: May 25, 2014, 12:38:39 AM »
I've become a new fan of zink re-plating.   Wow!
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1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline martin99

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Re: 1977 CB750F1 Project UK
« Reply #26 on: May 25, 2014, 08:13:02 AM »
Who did the plating? Last time I had some done it turned out sh1te compared to that!
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Build threads:
77 750F2 Refresh Project http://forums.sohc4.net/index.php?topic=144075.0
TRIBSA http://forums.sohc4.net/index.php/topic,160296.0.html

1977 CB750 F2
1958 Norton Model 99
2011 Triumph Street Triple 675

Offline martin_uk

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Re: 1977 CB750F1 Project UK
« Reply #27 on: May 25, 2014, 02:28:54 PM »
Quote from: oldskoolnuts on May 25, 2014, 08:13:02 AM
Who did the plating? Last time I had some done it turned out sh1te compared to that!

Mercury Electroplating in Frimley Surrey http://mercuryelectroplating.com/

I have used before and seem to do a good job.

I electric wire brush first to remove rust.

Here is the rest they did.
2014_0519eng0016 by nitram2010, on Flickr

It normally costs £30 for a shoe box sized batch
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Offline martin_uk

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Re: 1977 CB750F1 Project UK
« Reply #28 on: May 25, 2014, 02:32:54 PM »
Managed to remove broken bolt from engine mount.

Now need to see if I can get it welded.

2014_0519eng0024 by nitram2010, on Flickr
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Offline martin_uk

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Re: 1977 CB750F1 Project UK
« Reply #29 on: May 26, 2014, 06:55:30 AM »
Just spent ages typing out update on wheel trueing and jig and then lost it  :o

Briefer version.

Used wheel balancer adaptor on paddock stand, pencils for pointers, extra O rings to stop side movement.

Pieces of inner tube to hold pointers, also using spray can as base.

trueing jig7 by nitram2010, on Flickr

trueing jig6 by nitram2010, on Flickr

trueing jig5 by nitram2010, on Flickr
« Last Edit: May 26, 2014, 07:47:22 AM by martin_uk »
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Offline stewonepot

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Re: 1977 CB750F1 Project UK
« Reply #30 on: May 26, 2014, 07:15:16 AM »
Hi Mart
i have the same bike here in spain yours is going to be the business
kind regards Stew
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Offline vfourfreak

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Re: 1977 CB750F1 Project UK
« Reply #31 on: May 26, 2014, 03:37:58 PM »
Quote from: martin_uk on May 26, 2014, 06:55:30 AM
Just spent ages typing out update on wheel trueing and jig and then lost it  :o

Briefer version.

Used wheel balancer adaptor on paddock stand, pencils for pointers, extra O rings to stop side movement.

Pieces of inner tube to hold pointers, also using spray can as base.

trueing jig7 by nitram2010, on Flickr

trueing jig6 by nitram2010, on Flickr

trueing jig5 by nitram2010, on Flickr

You're not a fan of Heath Robinson by any chance ??
Seriously, great work there, keep it up.

Kev
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Offline martin_uk

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Re: 1977 CB750F1 Project UK
« Reply #32 on: May 29, 2014, 11:06:03 AM »
Started to reassemble the sprocket carrier but bearing retainer binds after going in about 5mm. Its a genuine item and old retainer screwss in fine.
tried filing away staked areas, but same problem.

Cleaned threads using an angled scriber, no luck.

Tried dry, then greased, same problem  >:(

Checked threads with pitch gauge (1.00) looks the same.

Threads on old look to match new.

The old one had slight elongation of tool location holes so did not want to reuse unless I had to.

Did a bit more checking and found the tip on here to use a tap with same thread pitch (m6) to clean up threads.

This seemed to work well using a scraping action around the inner threads.

Cleaned and greased then attempted one more time with new retainer. Success  :)

I guess old thread in sprocket carrier was deformed and old retainer had deformed to match.

I had a spare sprocket carrier and then drilled out stakes with a 3mm drill about 4 mm deep.

This time the retainer came out easily.

Hope this helps others.

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Offline martin_uk

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Re: 1977 CB750F1 Project UK
« Reply #33 on: July 16, 2014, 08:48:46 AM »
I have been making progress and am at rolling frame stage.

Pleased with look of wheels and brakes

Managed to get a NOS rear brake cover and plastic window, that I didnt know existed until seeing on parts list!

Used stainless rear brake hose with black covering to keep discrete.

2014_0716brakes0020 by nitram2010, on Flickr

2014_0716brakes0019 by nitram2010, on Flickr

2014_0716brakes0005 by nitram2010, on Flickr

Calipers powder coated with new seals and found red dot :-)

2014_0716brakes0029 by nitram2010, on Flickr
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Offline martin_uk

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Re: 1977 CB750F1 Project UK
« Reply #34 on: July 16, 2014, 08:59:51 AM »
Not sure which way round the indicator/winker buzzer goes?

As its for rider should it face back.

Tried it and it is loud, but nice to have original.

2014_0716brakes0009 by nitram2010, on Flickr
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Offline martin_uk

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Re: 1977 CB750F1 Project UK
« Reply #35 on: July 16, 2014, 09:05:18 AM »
Painted meters with Simoniz tough  black satin

2014_0716brakes0031 by nitram2010, on Flickr

2014_0716brakes0033 by nitram2010, on Flickr

Red tape is just to protect chrome until fully tightened

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Offline Hon3ybadger

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Re: 1977 CB750F1 Project UK
« Reply #36 on: July 16, 2014, 06:28:00 PM »
Starting to look like a pretty F'er! Good choice on the bars. Don't do black bars. it's a poor choice. Trust me. lol
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Offline martin_uk

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Re: 1977 CB750F1 Project UK
« Reply #37 on: July 17, 2014, 12:00:43 PM »
They are pattern ones from DS, seem OK.

Chromers wanted £50 to do mildly pitted originals!
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Offline martin_uk

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Re: 1977 CB750F1 Project UK
« Reply #38 on: July 17, 2014, 12:04:35 PM »
Some pics of rear master cylinder before.
2014_0503cb750B40003 by nitram2010, on Flickr


2014_0503cb750B40004 by nitram2010, on Flickr

2014_0503cb750B40005 by nitram2010, on Flickr
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Offline martin_uk

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Re: 1977 CB750F1 Project UK
« Reply #39 on: July 17, 2014, 12:11:42 PM »
Some carb linkage details in case it helps anyone

2014_0504cb750B40008 by nitram2010, on Flickr

2014_0504cb750B40007 by nitram2010, on Flickr

Dont forget felt washer
2014_0504cb750B40006 by nitram2010, on Flickr

Plus seat side trim fixing
2014_0627clips0017 by nitram2010, on Flickr

Chrome parts before, seems very expensive, this is £140 worth, was due back today after 3 weeks, but will be next week
2014_0627clips0001 by nitram2010, on Flickr
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Offline martin_uk

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Re: 1977 CB750F1 Project UK
« Reply #40 on: August 13, 2014, 01:45:00 AM »
Engine cases and sump plate cleaned and painted with Simoniz silver wheel paint.

eng inst 110814027 by nitram2010, on Flickr

eng inst 110814028 by nitram2010, on Flickr

eng inst 110814029 by nitram2010, on Flickr
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Offline martin_uk

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Re: 1977 CB750F1 Project UK
« Reply #41 on: August 13, 2014, 01:51:16 AM »
Head and cylinders painted with Simoniz engine enamel and cured in oven. Be careful liners dont slip!

eng inst 110814009 by nitram2010, on Flickr

eng inst 110814008 by nitram2010, on Flickr

ready to fit engine.
eng inst 110814003 by nitram2010, on Flickr

eng inst 110814001 by nitram2010, on Flickr

Its in  :)

eng inst 110814023 by nitram2010, on Flickr
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Offline SOHC4 Cafe Racer Fan

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Re: 1977 CB750F1 Project UK
« Reply #42 on: August 13, 2014, 11:19:54 AM »
The paint looks good.  Just curious, why did you paint the crankcases and oil sump with wheel paint as opposed to engine enamel?
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1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline martin_uk

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Re: 1977 CB750F1 Project UK
« Reply #43 on: August 13, 2014, 01:02:15 PM »
Quote from: CB750 Cafe Racer Fan on August 13, 2014, 11:19:54 AM
The paint looks good.  Just curious, why did you paint the crankcases and oil sump with wheel paint as opposed to engine enamel?

It is called wheel paint, but I have used before and finish is good and doesnt need to be cured.

It is OK on lower temperature cases, but I used high temp engine enamel on cylinders and head.
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Offline martin_uk

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Re: 1977 CB750F1 Project UK
« Reply #44 on: August 21, 2014, 01:48:30 PM »
Fitted the oil pump after stripping and fitting new O rings.

Primed by rotating in oil.

Cranked engine on starter with plugs out, but oil light stays on and oil tank level not dropped after putting in 3 litres.

Tried pressurising oil tank by using adaptor on vent pipe and cranking.

After a few attempts light went out :-)

Tried a few more times and light goes out after a few seconds.

Now tried starting, fired straight up, but with no exhaust so only a few seconds, as still havnt found a good one.

Cleaned up rusty exhaust as temporary measure and fitted gauges to syncronise carbs.

Problems finding correct pipes for breather system as most alternatives seem to be too thick for 12mm inner, original very hard and 14mm outer.

Hope to get on the road this weekend  :)
« Last Edit: August 21, 2014, 01:54:30 PM by martin_uk »
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Offline martin_uk

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Re: 1977 CB750F1 Project UK
« Reply #45 on: August 23, 2014, 12:33:52 PM »
Engine in waiting for carbs

DSC_0137 by nitram2010, on Flickr

Oil tank fitted

DSC_0134 by nitram2010, on Flickr

Electronic ignition from David Silver

DSC_0132 by nitram2010, on Flickr


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Offline martin_uk

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Re: 1977 CB750F1 Project UK
« Reply #46 on: August 23, 2014, 12:42:08 PM »
Tank on and seat fitted, indicators installed.

Temporarily used spare rear bumper rail painted black, no clutch outer plate as I am waiting for chrome plating.

Time to take to the road :)

DSC_0148 by nitram2010, on Flickr

DSC_0147 by nitram2010, on Flickr

DSC_0145 by nitram2010, on Flickr

DSC_0144 by nitram2010, on Flickr

Goes well and handles nicely, very pleased.
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Offline martin99

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Re: 1977 CB750F1 Project UK
« Reply #47 on: August 23, 2014, 03:53:11 PM »
Well done mate, you must be well chuffed. Good looking bike. Better get some miles in tomorrow, Monday don't look too good!
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Build threads:
77 750F2 Refresh Project http://forums.sohc4.net/index.php?topic=144075.0
TRIBSA http://forums.sohc4.net/index.php/topic,160296.0.html

1977 CB750 F2
1958 Norton Model 99
2011 Triumph Street Triple 675

Offline martin_uk

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Re: 1977 CB750F1 Project UK
« Reply #48 on: August 24, 2014, 02:51:24 AM »
Quote from: oldskoolnuts on August 23, 2014, 03:53:11 PM
Well done mate, you must be well chuffed. Good looking bike. Better get some miles in tomorrow, Monday don't look too good!

Thanks Martin, will do.

Just ordered some bits for second one!
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Offline martin_uk

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Re: 1977 CB750F1 Project UK
« Reply #49 on: August 25, 2014, 04:51:02 AM »
Second ride, have now done 90 miles  :)

Enjoying the way it handles and performs.

cb750f1 482 by nitram2010, on Flickr

cb750f1 481 by nitram2010, on Flickr

cb750f1 479 by nitram2010, on Flickr
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