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Old 01-15-2012, 06:52 PM   #1
civhatch90 OP
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Welcome the new airhead to the club!!

So, casually looking through craigslist I found this pretty looking airhead. Its my first BMW ever, and I know nothing about these bikes other than what I see here in the old's cool section of advrider. Paid 1.8k, 1975 with 75k miles. Looks to be in pretty good condition.

Joins the stable of: 1983 Kawasaki KZ550, Honda CB500, and SV650. One of the four will have to leave this spring.

Can't wait to ride it. I want to see what you old folks love so much about them...

Anything I should check before starting to ride this thing other than fluids? Should I check the tranny splines? What else?






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Old 01-15-2012, 07:10 PM   #2
d mc gee
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Looks like you got a good deal! Dose it run?
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Old 01-15-2012, 08:08 PM   #3
civhatch90 OP
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Yep, runs fine. It does need a new battery and fork seals replaced.
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Old 01-15-2012, 08:55 PM   #4
subagon
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Love the red

Join the Airheads and attend a local tech day to learn all about maintaining your bike.
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Old 01-15-2012, 09:25 PM   #5
Wirespokes
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I'd say you got a helluva good deal! If it runs as well as it looks you got a real winner!

Welcome to the club, and fill in your profile so we can see where you hail from.
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Old 01-15-2012, 09:54 PM   #6
fishkens
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Quote:
Originally Posted by civhatch90 View Post

Joins the stable of: 1983 Kawasaki KZ550, Honda CB500, and SV650. One of the four will have to leave this spring.
Sounds like you need a bigger stable.

Nice bike! Congrats.
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Old 01-15-2012, 10:49 PM   #7
Hawk Medicine
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Wow!! Nice Airhead!

You made a pretty good choice! The R90s had many of the niggling problems taken care of, they make good power and they're true classics. All that said, I'll give you two cases of beer and my Playboy collection for it!

Yeah. Join the Airheads and hang around here. you'll be an expert in no time.

PS: you don't see a lot of red R90s but that one looks nice. Enjoy!
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Old 01-19-2012, 08:19 PM   #8
disston
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Is that bike red or it's just the lighting? I thought the color that year was a sorta rusty brownish red color.

You can paint it black later. Welcome.

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Old 01-19-2012, 09:40 PM   #9
gsd4me
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Quote:
Originally Posted by disston View Post
Is that bike red or it's just the lighting? I thought the color that year was a sorta rusty brownish red color.

My first BMW was an R60/6 that was painted maroon, which is what the rear guard looks like. Maybe it`s the light on the tank that makes this one look red.


Edit: I just did a bit of googling and apparently the maroon was called Bol D`Or red. There were a heap of colours produced, but not all went to all markets.
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Old 01-21-2012, 12:58 PM   #10
Tripletreat
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Wonderful!

Man, that was a bargain. Welcome to the fold. It'll probably take some getting used to the "character" of your Airhead if you've never had one before, but they have a strange way of worming their way into your life -- forever! Riding an Airhead on a long tour really is a sort of meditation. If I'm not mistaken, the Dali Lama owns an Airhead....
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Old 01-21-2012, 08:39 PM   #11
bmwhacker
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Very nice! I think 1975 was a good year too!
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Old 01-22-2012, 07:39 PM   #12
civhatch90 OP
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Quote:
Originally Posted by disston View Post
Is that bike red or it's just the lighting? I thought the color that year was a sorta rusty brownish red color.

You can paint it black later. Welcome.

Charlie
Well the back fender, from what I can tell, seems to be the original color, the tank, side plastics, and front fender have been repainted to very closely match the original color.
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Old 01-22-2012, 07:42 PM   #13
civhatch90 OP
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I added this question to my original post, anything I should check before starting to ride this thing other than fluids? Should I check the tranny splines? What else?
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Old 01-22-2012, 08:39 PM   #14
Tripletreat
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checkin'

The drive line splines do require attention. If you have doubts about the service history of your new ride, the issue of when the splines on the clutch were last lubed should be a high priority. If they are neglected, you're looking at an expensive repair. How does the bike shift? When the splines are dry, the clutch doesn't work all that well and shifting is not smooth. You should also check the valves. There are a lot of how-to posts on adjusting valve lash. It's not difficult for someone who has moderate mechanical skills. Pay close attention to torquing all the fasteners when you check the valves. If you strip a head bolt, that too can be expensive. Get a chart and follow the recommended torque values or you'll be sorry. I'd offer this additional tip: don't exceed about 26 ft/lbs on the headbolts, no matter what anyone tells you!
And after you've gotten the valves sorted, balance the carburettors. The airheads I've owned (all R100s) were sensitive to both carb. balance and valve lash. The engines all began to vibrate more when either one of those adjustments was not just right. Once properly set up, on going tuning isnt difficult at all. I suppose it varies from rider to rider, but typically I don't need to adjust valves or balance the carbs more than once a year. After you've sorted those things, you may wish to clean the connectors on the wiring harness if the bike has been in anything close to a humid environment. If you maintain good corrosion free connections, the electrical system will serve its purpose. If you ignore it, you may find the bike is not as reliable as you had hoped. My R100 airheads both are able to run reliably with the heated grips and heated jacket liner working. I have a high output voltage regulator, but otherwise the systems are completely stock. Do your maintenance and you're gonna be rewarded with a very satisfying bike
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Old 01-23-2012, 08:11 AM   #15
k12lts
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Nice bike.

My first BMW was a 75 R90/6 I bought in 1984.
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