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Author Topic: 1983 Nighthawk CB550SC  (Read 1177 times)
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Sparks Topic starter
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Bike: Nighthawk CB550SC
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Join Date: Aug, 2012




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« on: August 14, 2012, 06:13:56 PM »

Hello Everyone, new owner of a 83 CB550SC. The Ninja 500R in the background is also mine and my roommate has a Shadow 750 (not pictured).



It looks like my forks need to be redone




So I changed the oil and took off the wheels to get new tires (the old ones were from 1991 bugey) . I will have the forks resealed and I will also change out the brake and clutch fluid (Dot 3 for both right?).
I did have a couple questions:
For the overdrive at the back wheel, The Clymer manual says to use gear oil. Any suggestions for this? I'm a little confused on what I should be buying.
The tank looks like it has some surface rust on the inside, not super horrible from what I can see but I wouldn't mind treating it. Is POR15 the common way, any DIYs available?
The highbeam doesn't work, the indicator turns on so I am assuming it is just the bulb. (lowbeam works though)
All the hoses and brake pads look pretty good and the bike idles/drives good (short test drive because of crappy tires)
Anything else I should do before happily motoring around on it?
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Major Kong
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Bike: 1983 Nighthawk 550
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« Reply #1 on: August 14, 2012, 11:31:33 PM »

That's gonna be a looker!  Gear oil will be available at any parts store, the weight is stamped on the final drive near the filler.  DOT 3 or DOT 4 brake fluid should be good.  I like Castrol.  Get a new bottle.  When you open a bottle of brake fluid it starts absorbing water, which deteriorates it's performance over time.  I'll let others chime in on tank treatments, I have always left them bare.  Good luck with it.  I really like riding my 550!
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Sparks Topic starter
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« Reply #2 on: August 15, 2012, 01:19:42 AM »

That's gonna be a looker!  Gear oil will be available at any parts store, the weight is stamped on the final drive near the filler.  DOT 3 or DOT 4 brake fluid should be good.  I like Castrol.  Get a new bottle.  When you open a bottle of brake fluid it starts absorbing water, which deteriorates it's performance over time.  I'll let others chime in on tank treatments, I have always left them bare.  Good luck with it.  I really like riding my 550!
Thanks for the info. Took the bike out today for a quick spin after putting the new tires on. Made it a few blocks before it died on me, possibly bad gas, dont know how long the stuff sat in the tank (didnt look that bad shog) Battery also appears to be on its last leg. Anyways roommate brought some fresh gas and a battery tender and eventually it would idle and drive again. Spark plugs look pretty rough from the outside so Im going to pull them and replace. New air filter also seems to be on the list. Hopefully between all that I wont run into the issue again.
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Brittles
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« Reply #3 on: August 15, 2012, 05:36:45 AM »

+1 on the Por 15. I treated my tank over a year ago and recently pulled the tank to replace my petcock. Was happy to find the in-tank filter spotless.
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John

'84 CB700SC
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bajakirch
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« Reply #4 on: August 15, 2012, 07:48:43 AM »

Welcome to the One-Year Wonder Club! That's a great looking 550.

Tires from '91?!  yikes I'm surprised they still held air.
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Some riders dress for the summer; I dress for the fall.
Sparks Topic starter
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Bike: Nighthawk CB550SC
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« Reply #5 on: August 15, 2012, 12:07:02 PM »

Welcome to the One-Year Wonder Club! That's a great looking 550.

Tires from '91?!  yikes I'm surprised they still held air.
Haha yea, and I rode them around the block on my test drive yikes . Funny thing is that they had maintenance records from 2007 so I guess they were riding on them then. I will check out the POR15 kit on amazon, going to be ordering a bunch of stuff since its payday  ricky
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TimmyJ
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« Reply #6 on: August 15, 2012, 12:21:47 PM »

Hello Everyone, new owner of a 83 CB550SC. The Ninja 500R in the background is also mine and my roommate has a Shadow 750 (not pictured).

nice  eek7
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