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Old 04-25-2011, 08:04 AM   #1
ydocgnortsmra OP
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1974 BMW Airhead

I was told from one of the guys on a different bike forum that if I gave my VIN on here, someone could tell me the engine size off of my 74 Airhead. My VIN number is 4042383. Any help y'all could give is extremely appreciated. Here are some pics of it, if anyone was interested.



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Old 04-25-2011, 08:12 AM   #2
bpeckm
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Vin would be tedious, but it could be done...

Easiest: look at the base of the jug, closest to the block, on top... one side will have a number, like a 5, 6, 7, 8, 9 or 10.... those correspond, amazingly enough, to 500cc, 600cc, etc etc.... btw the other side will have a letter, which has something to do with allowable piston tolerances to that bore, iirc....

My guess is that you have an R75/6, based on the carbs and brakes....


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Old 04-25-2011, 08:14 AM   #3
tennessee thumper
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punch in your # here...came up as an early R90.

http://www.bmw-z1.com/VIN/VINdecode-e.cgi

tennessee thumper screwed with this post 04-25-2011 at 08:21 AM
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Old 04-25-2011, 08:42 PM   #4
ydocgnortsmra OP
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Thank y'all so much! I ask because I am looking to sell it and get something newer, mechanical tinkering is not something i have the time for at the moment. Out of curiosity, what to do you think it is worth? It runs well and is cosmetically fine.

Also- What does an R90 equate to in terms of CC's?
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Old 04-25-2011, 08:44 PM   #5
blaine.hale
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$1800 on a really good day. If you want my opinion.
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Old 04-25-2011, 09:03 PM   #6
bmwhacker
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Does it run and move on its' own?
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Old 04-25-2011, 09:06 PM   #7
crazydrummerdude
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Quote:
Originally Posted by bpeckm View Post
My guess is that you have an R75/6, based on the carbs and brakes....
Ya couldn't use that based on pics of my R90 and R75 (if I removed the engine badges).

Quote:
Originally Posted by ydocgnortsmra View Post
Thank y'all so much! I ask because I am looking to sell it and get something newer, mechanical tinkering is not something i have the time for at the moment. Out of curiosity, what to do you think it is worth? It runs well and is cosmetically fine.

Also- What does an R90 equate to in terms of CC's?
This smells fishy.

Damn, n00b. An R90 (that bike was 100 after mine) is 900cc.

I'd pay $1000 if it ran and moved.
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Old 04-25-2011, 09:16 PM   #8
ydocgnortsmra OP
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Yes, it runs completely fine. Why does it sound fishy to you?
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Old 04-25-2011, 09:33 PM   #9
fishkens
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Quote:
Originally Posted by ydocgnortsmra View Post
It runs well and is cosmetically fine.
I'll try to be gentle but will probably fail.

If that's POS is what you consider to be "cosmetically fine" then your assessment that it "runs well" is 100% w/out any credibility and I expect that it may start and run at best.

Unless the engine, etc. has been meticulously maintained underneath the rattlecan crap what you've got is a conglomeration of parts (tank, fenders, valve covers, etc.) that can be sold. Heck, it doesn't even have gauges to sell.

$1,000 max but I'd start deducting from that if I couldn't leave the fairing, saddle, top-case, mirrors and other assorted worthless crap with you (they're destined to cost the owner money at the dump).

Then again, it's worth whatever you can get someone to pay you for it. I encourage you to sell it for as much as possible and turn that into a better motorcycle.
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Old 04-25-2011, 09:43 PM   #10
kwb210
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+1
well put. might as well get to the point. I just bought a 1976 R75/6 for 2000 that was in really excellent condition, pretty actually, just had some mechanical issues, but, again, it was "pretty", this bike is simply gonna cost some huge bucks to get lookin pretty. And what do you mean by it runs well? Because it is far from cosmetically fine. I guess I may not have been gentle...but you did ask...


Quote:
Originally Posted by fishkens View Post
I'll try to be gentle but will probably fail.

If that's POS is what you consider to be "cosmetically fine" then your assessment that it "runs well" is 100% w/out any credibility and I expect that it may start and run at best.

Unless the engine, etc. has been meticulously maintained underneath the rattlecan crap what you've got is a conglomeration of parts (tank, fenders, valve covers, etc.) that can be sold. Heck, it doesn't even have gauges to sell.

$1,000 max but I'd start deducting from that if I couldn't leave the fairing, saddle, top-case, mirrors and other assorted worthless crap with you (they're destined to cost the owner money at the dump).

Then again, it's worth whatever you can get someone to pay you for it. I encourage you to sell it for as much as possible and turn that into a better motorcycle.
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Old 04-25-2011, 10:07 PM   #11
wirewrkr
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Quote:
Originally Posted by ydocgnortsmra View Post
Yes, it runs completely fine. Why does it sound fishy to you?
Basically, everyones "douchebag" alarm goes off when someone joins the forum and then Immediately tries to sell off their bike, find out what it's worth etcetra.
NOT saying you're that douchebag, but it is bad form and pisses everyone off, which is why some of the answers are a little "in your face".

We shredded a guy last year who did the same thing with a "world famous Pikes Peak racer" bike.
I'm sure he still gets heartburn when he even hears the word BMW
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Old 04-25-2011, 10:13 PM   #12
bmwhacker
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I love this place!
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Old 04-25-2011, 10:21 PM   #13
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See?
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Old 04-25-2011, 10:26 PM   #14
bmwhacker
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...This thread is just oozing love and tenderness.
Poor bastard's leaving a blood trail.
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Old 04-26-2011, 05:17 AM   #15
Gimmeslack
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I'll be nice - just ignore all these other grumpy old airheads.

The bike's accessories are not collectible, and frankly, are considered pretty unappealing by modern standards. So, if anything, that can sometimes *lower* the value of a bike

There also appear to be items missing - instruments for example - which can turn into huge $$ for someone wanting to restore or resurrect such a bike.

Paint is wrong/bad and there's rust clearly showing, so most folks are going to assume major overhaul, just to get this thing even close.

A nice airhead can be bought for $3-5k, and it's usually worth it to spend that much, because all the 'issues' with a bike like yours can add up to several thousand dollars in a heartbeat. The net result is that you should be happy to get $1k and ecstatic if you could get as much as $2k IMHO. Most likely is the first scenario, as the bike - if it can be determined that it does indeed run well - would be an attractive project for someone who already has some parts, or a donor bike.

An excellent place to see what's possible is, of course, ebay, though that's sometimes misleading. ymmv.

You could also post it in FleaMarket forum (here on ADV), put a price on it, and add 'OBO'. It'll help to know where bike is located, whether it starts and runs reliably, etc. More close-up photos too.

Good luck either way. In spite of all the negative comments, it's possibly a great bike. Spend a little time on this forum and you'll see some much worse examples turned into rolling art.
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