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Author Topic: Pete's 82 Nighthawk Project  (Read 19100 times)

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Offline irish44395

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Pete's 82 Nighthawk Project
« on: December 15, 2015, 03:18:22 PM »
This is my first bike project in some ways I am a little over my head here but I am going to give it a go.
 I need a few things yet To get it running, I can turn the motor over with a wrench ,taken one tappet cover off everything looks good ,The original tank isn't on the bike in the pic I have taken it to work and started to weld up the hole there is a lot here is a few picture of what that all looks like,
Pete
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Offline irish44395

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Re: Pete's 82 Nighthawk Project
« Reply #1 on: December 15, 2015, 03:20:07 PM »
a few more of the tank
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Offline irish44395

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Re: Pete's 82 Nighthawk Project
« Reply #2 on: December 15, 2015, 03:24:11 PM »
I had done a little more welding after work today didn't take any pics my main goad is to get the tank tight and grind down some of the weld my need some body stuff not sure depends how I can blend in the weld with the tank we'll see
Pete
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Offline SOHC4 Cafe Racer Fan

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Re: Pete's 82 Nighthawk Project
« Reply #3 on: December 15, 2015, 04:13:08 PM »
Pete,

Welcome to sohc4.net!  Be sure to download the owner and service manual (http://www.sohc4.net/cb650-manuals/).  Please note that there are slight changes between 1979-80 models and 1981-82 models.  Specifically, the head is slightly different and the models use different carburetors (slide models for the earlier years and CV models for the later years).

The 650 is overlooked and underappreciated, but the engine is a substantial improvement over the 550 in torque and horsepower.  The head is more efficient than the 550, as well.  It can also be tuned -- with big bore kits and cams available.  And it weighs only a few pounds more than the 550.  In fact, the 650 engine bolts directly into 500 and 550 frames.  You can check out DaveBaubier and my build threads where we are transplanting tuned 650 engines into 550 frames.

Don
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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 irish44395

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Re: Pete's 82 Nighthawk Project
« Reply #4 on: December 16, 2015, 01:49:57 PM »
Thanks Don for the welcome and the info on  the 650. I have a clymer that came with the bike so I good to go . I am going to have fun doing this bike just getting started and have fun already
Pete
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Offline irish44395

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Re: Pete's 82 Nighthawk Project
« Reply #5 on: December 16, 2015, 01:57:26 PM »
did more work on the tank . I thought I had all the holes filled but when I sandblasted the rest of the tank I found a few more plan and filling them tomorrow at work and get ready to air test it. the start grinding down the welds and retesting . I want all the welding done on it before I put any fuel in it . Here's some pic of the tank to date
Pete
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Offline SOHC4 Cafe Racer Fan

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Re: Pete's 82 Nighthawk Project
« Reply #6 on: December 16, 2015, 02:21:43 PM »
Even after pressure testing, it would not hurt to line the tank with some Caswell epoxy.  It will not degrade with Ethanol-based fuel and give you peace of mind against leaks.
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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 irish44395

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Re: Pete's 82 Nighthawk Project
« Reply #7 on: December 17, 2015, 02:15:58 PM »
I been thinking about it not sure what to use so I'll look into this ,last thing I want is to have a leak after I put fuel in it.
Thanks Pete
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Offline irish44395

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Re: Pete's 82 Nighthawk Project
« Reply #8 on: December 17, 2015, 02:22:13 PM »
Today I just welded leaks , turned up the argon soaped it up and marked leaks ,fixed leaks , getting close to sealing it up . If any one know how much air pressure I should use please let me know I think 2 to 3 psi should do it more afraid  of putting to much pressure in it,
Pete
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Offline irish44395

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Re: Pete's 82 Nighthawk Project
« Reply #9 on: December 18, 2015, 12:51:48 PM »
Today all leaks sealed, got the tank back home and started to grind the welds with my Dremel . Its going to be slow I want to be careful not to grind into the original metal .
Pete
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Offline cb650

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Re: Pete's 82 Nighthawk Project
« Reply #10 on: December 18, 2015, 03:21:47 PM »
Nice your making a original work.   Mot many around anymore.
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Offline irish44395

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Re: Pete's 82 Nighthawk Project
« Reply #11 on: December 19, 2015, 12:55:49 PM »
Thanks
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Offline irish44395

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Re: Pete's 82 Nighthawk Project
« Reply #12 on: December 19, 2015, 12:57:08 PM »
just did a little grinding with the dremel today
Pete
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Offline cb650

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Re: Pete's 82 Nighthawk Project
« Reply #13 on: December 19, 2015, 01:43:40 PM »
What are your plans for paint? and the bike?
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Offline irish44395

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Re: Pete's 82 Nighthawk Project
« Reply #14 on: December 19, 2015, 03:34:03 PM »
I would like to make it as original as possible. Once I get it running I will disassemble to the frame and paint . The chrome is in good condition with very little rust . So I think I can bring it back in better than good condition .
Pete
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Offline cb650

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Re: Pete's 82 Nighthawk Project
« Reply #15 on: December 19, 2015, 04:23:50 PM »
Nice   Remeber there are some 82 nitehawk specific parts when you need things.
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Offline jonesjarod55

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Re: Pete's 82 Nighthawk Project
« Reply #16 on: December 19, 2015, 10:12:26 PM »
Very interested in the finished product, I have a bobbed 1980 650 myself.


Sent from my iPhone using Tapatalk
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Offline irish44395

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Re: Pete's 82 Nighthawk Project
« Reply #17 on: December 20, 2015, 11:07:56 AM »
Thanks this is going to be a big learning experience most of my experience is from just doing maintenance on my already working bikes .checking valves ,synic carbs breaks and oil ect..
Pete
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Offline irish44395

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Re: Pete's 82 Nighthawk Project
« Reply #18 on: December 20, 2015, 11:18:07 AM »
Today ,didn't do much did a little grinding , go a bright idea,put some 3/4 inch tubing from my sprinklers on the end of my shop and vac out all the debris from the tank. I even got out a few egg corns,and the rest of the fuel  filter. Then I got the idea of putting aquarium stones in the tank to get rid of more rust . caswell epoxy says to put sheet rock screws in the tank so I am thinking the stones would be easier to get out try it and got all out easy with my vac. I put them back in so every time I move the tank while grinding my welds it get agitated by the time I get my epoxy It will be good to go.
Pete
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Offline cb650

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Re: Pete's 82 Nighthawk Project
« Reply #19 on: December 20, 2015, 11:34:46 AM »
I used to put in smallish tumbling stones and wrap the tank in a blanket and put it snug in a small cement mixer. 
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Offline irish44395

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Re: Pete's 82 Nighthawk Project
« Reply #20 on: December 20, 2015, 12:43:02 PM »
I was trying to think of a way to automate that process . Momma wouldn't like the idea of me bring home a cement mixer...lol
Pete
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Offline irish44395

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Re: Pete's 82 Nighthawk Project
« Reply #21 on: December 21, 2015, 03:24:39 PM »
I didn't do ant thing to the bike today, I did get to the DMV and transferred the title .I also got 4gallons of fresh gas and seafoam . Tomorrow I am going to give it a shot to turn the motor over . and go from there I am thinking I'll have to clean the carbs. Been reading the clymer getting familiar with the carbs . This is going to be a big step for me. I have removed the carb s off the Vstar but never broke any down to clean.
Pete
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Offline SOHC4 Cafe Racer Fan

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Re: Pete's 82 Nighthawk Project
« Reply #22 on: December 21, 2015, 04:18:41 PM »
Quote from: irish44395 on December 20, 2015, 11:18:07 AM
Today ,didn't do much did a little grinding , go a bright idea,put some 3/4 inch tubing from my sprinklers on the end of my shop and vac out all the debris from the tank. I even got out a few egg corns,and the rest of the fuel  filter. Then I got the idea of putting aquarium stones in the tank to get rid of more rust . caswell epoxy says to put sheet rock screws in the tank so I am thinking the stones would be easier to get out try it and got all out easy with my vac. I put them back in so every time I move the tank while grinding my welds it get agitated by the time I get my epoxy It will be good to go.
Pete

I just took mine to a radiator shop to have it blasted and pressure tested for a few bucks.  Then I Caswell lined it.
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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 irish44395

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Re: Pete's 82 Nighthawk Project
« Reply #23 on: December 21, 2015, 05:06:53 PM »
I feel I got a good pressure test at work after I finished welding it. I will give it another test after I finished grinding down the welds just to make sure I didn't open up a thin spot. Then use the caswell on it. By this time the inside should look pretty good
Pete
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Offline irish44395

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Re: Pete's 82 Nighthawk Project
« Reply #24 on: December 22, 2015, 03:38:22 PM »
I managed to Confuse my self pretty good and may need some help. First I put power to the bike form my Yamaha turn the key and the started  crank but I am not sure if it turn the motor
Then I put a little gas in it filled the bowels when I cranked it gas came out from what  I think is the over flow. Ok now looking at the carbs there are just one hoses on the auto fuel valve here's a few pics of the carbs
I am not sure where these hoses should be ?
« Last Edit: December 22, 2015, 03:41:32 PM by irish44395 »
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