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Offline T4HALO

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Wish me luck
« on: March 24, 2016, 08:39:45 AM »
I am going to get started on my 02/70 750.  She hasn't been on the road since 82 but started from time to time.  The tank is a little rusty so I figured I'd pull the tank and drain and change the oil.  Any hints from the experts would be appreciated.  I want to get her running and back on the road. 

Thanks, T4

« Last Edit: March 24, 2016, 08:45:15 AM by T4HALO »
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Offline Ericcb750

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Re: Wish me luck
« Reply #1 on: March 24, 2016, 08:48:58 AM »
What a great looking bike man!! Congratulations, that's awesome. I have a later model 78K which I love but some day I would like to get an earlier one like this too. My favorite is the planet blue paint scheme, not sure what year they did it in. This one's pretty sweet though man.

I would go through the standard 3k tune-up process, I think there's some threads on it here. This is by far THE BEST Place to get info on these bikes and meet all sorts of great people. The guys on here have been beyond helpful with me on my first one, and even today I'm still learning new things about these.

Not sure how it runs but a clean out of the carburetors may help if it's running funky. Awesome bike man, Have fun with it. These have so much character compared to the newer bikes. Don't get me wrong, I have a modern bike too but I love my CB750 too.
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1978 CB750K
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Offline calj737

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Re: Wish me luck
« Reply #2 on: March 24, 2016, 08:57:19 AM »
Yes, definitely perform the complete 3k Mile Service. Hopefully, your carbs won't need much in the way of a rebuild, but it would be wise to flush them with good, clean gas at a minimum. Likely you'll need to clean the tubes and jets, but fingers crossed a comprehensive tune-up sees it on the road.

If there's rust in the tank, I'd use something like Evaporust or an etching compound only and test for leaks afterwards. Remove the petcock and be sure its running clear and unobstructed.
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'74 550 Build http://forums.sohc4.net/index.php?topic=126401.0
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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 T4HALO

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Re: Wish me luck
« Reply #3 on: March 24, 2016, 01:49:21 PM »
Thanks..  Just left the previous owners house, he is taking care of the title tomorrow.  I shouldn't have been so lazy over the winter.  This thing should be rideable by now.

T4

« Last Edit: March 24, 2016, 02:08:24 PM by T4HALO »
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Offline flybox1

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Re: Wish me luck
« Reply #4 on: March 24, 2016, 01:58:09 PM »
+3 - 3000mi tuneup.
sweet ride!  8)
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'78 750K (F3 engine) PD42b's, Modified airbox w/K&N  filter, 40/110 jets, 1 needle shim, IMS@ 1 turn out. Kerker + Cone 18" QuietCore

Past Bikes
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Offline Kevin D

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Re: Wish me luck
« Reply #5 on: March 24, 2016, 02:17:05 PM »
Good looker halo, nobody has mentioned brakes and tires, but that back tire looks bald and I can only imagine what the brake fluid looks like. Check the brake hoses for cracks. Check the drive chain carefully. Don't want to be slinging a chain through that beauty.

Good Luck, a charged battery and fresh gas goes along way. If you have been starting it you know what to expect.
« Last Edit: March 24, 2016, 02:18:50 PM by Kevin D »
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71 CB750 K1
104,000 miles
Original Owner
———past———
70 SL100/125/150
70 Candy BlueGreen CB 750 K0
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Offline Tews19

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Re: Wish me luck
« Reply #6 on: March 24, 2016, 02:19:33 PM »
Wow! Mind if I ask how much you got it for?
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1969 Honda CB750... Basket case
1970 Honda CB750 survivor.

Offline Garage_guy_chris

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Re: Wish me luck
« Reply #7 on: March 24, 2016, 02:22:20 PM »
Really nice looking bike I wish I could get my hands on an early bike like yours!

If it has sat unturned un-run since 82 if it was mine i would be doing a 3000km's tune up and a few addittional things

1. pull the plugs add some oil to the cylinders to lube the rings and valves
2. pull a few tappet covers and dump 1 liter of oil in through the tappet holes (do some on both sides) lube that cam, rockers and cam chain also helps re-prime the scavenge side of the oil pump
3. add the other 2.5-3.0 liters to the oil tank to complete the oil change
3. with the plugs out gently turn it over to distribute the oil
4. crank it over with the plugs out for maybe 5 times of  5 second intervals. get the pump re-primed and oil flowing without the load of compression
5. Once things are well lubricated put the plugs in and start that beauty

Also if the oil coming out of it from storage is really nasty maybe consider dropping the pan for an inspection
« Last Edit: March 24, 2016, 02:24:53 PM by Garage_guy_chris »
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1974 Cb750 Restomod (on the road)

Offline T4HALO

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Re: Wish me luck
« Reply #8 on: March 24, 2016, 02:29:20 PM »
Quote from: Tews19 on March 24, 2016, 02:19:33 PM
Wow! Mind if I ask how much you got it for?

A couple of nice old rifles. 

I read the plate wrong.  It was plated in 92 not 82.  The previous owner started it a few times until around 2000.  I have not started it yet.

T4

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Offline Johnie

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Re: Wish me luck
« Reply #9 on: March 24, 2016, 03:13:18 PM »
Halo...nice score! She looks sweet. Dang that paint looks good. How is the exhaust? Don't be surprised when it starts. Mr. Honda built a good bike and with little maintenance these things run forever. If you are lucky enough to find one chances are it will start. But to get it to run like back in the day it is wise to listen to the guys here and do the 3,000 mile. Carb rebuilds are not bad. The hardest part on these KO carbs is getting the sync spot on. At least that was the hardest for me, but I am a bit anal about it :)  Good luck and keep us up to date on the progress.
« Last Edit: March 24, 2016, 03:15:26 PM by Johnie »
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1970 CB750K0 - Candy Ruby Red
1973 CB750K3 - Candy Bacchus Olive or Sunflake Orange
1970 Chevy Chevelle SS396 - Cortez Silver
1976 GL1000 Sulphur Yellow

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Offline SOHC4 Cafe Racer Fan

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Re: Wish me luck
« Reply #10 on: March 24, 2016, 04:05:28 PM »
You should move this thread over to Project Bikes or re-start it there. We'd all love to follow this as a project.
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2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
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"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)

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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 SOHC4 Cafe Racer Fan

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Re: Wish me luck
« Reply #11 on: March 24, 2016, 04:07:52 PM »
FYI - you can use the MOVE TOPIC link below to move this to Projects.  Just saying . . .

Awesome bike to start with!! 
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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 T4HALO

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Re: Wish me luck
« Reply #12 on: March 24, 2016, 05:34:06 PM »
Tank has been pulled dumped and petcock removed.  There was some nasty orange gas poured out of the tank and now it sits with vinegar.  How long would you leave it with the vinegar?  Where is the best place to order the petcock screen and gasket set?

Thanks, T4
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Offline mystic_1

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Re: Wish me luck
« Reply #13 on: March 24, 2016, 05:40:53 PM »
Wowza, that's a sweet ride.

Mine was built in 02/70 also, but it looks... a little different now.  :) 



Like twins separated at birth ;)


Your paint looks amazing!  keep it!  In fact, what you've got there appears to be an excellent condition original survivor of the first full production year of an extremely popular and culturally significant motorcyle.  I say "full production year" because these bikes were released in July 1969 so only a half year in 69.  The only thing more rare than this is the very early "sandcast" models.

You could make a small fortune parting that thing out, BUT FOR GODS SAKE DON'T DO THAT!  :o ;D

If your rifles were worth anything less than a few thousand dollars, you made out good.  Enjoy it!

mystic_1



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"A ship in harbor is safe, but that is not what ships are built for."
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My build thread:  http://forums.sohc4.net/index.php?topic=68952.0

Offline mystic_1

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Re: Wish me luck
« Reply #14 on: March 24, 2016, 05:43:20 PM »
As far as how long to let it sit with vinegar, that depends on how bad the rust is.  Vinegar is mildly acidic so you don't want to leave it in too long, nor do you want to let it get on that sweet sweet paint.

I'd leave it for "a while" and then rinse, and see where that got you.  Then repeat with successive "a while"s until it's clean :)

mystic_1
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"A ship in harbor is safe, but that is not what ships are built for."
- John Augustus Shedd

My build thread:  http://forums.sohc4.net/index.php?topic=68952.0
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