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Old 02-25-2013, 03:06 PM   #3526
bill42
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And 1974 R90/6 custom cafe..[/QUOTE]

Now that must be a loud bike!
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Old 02-25-2013, 03:09 PM   #3527
Captdan
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What you can't see is the snuffers at the end of the strait pipes. So, yes it can be loud, but also a bit more quiet. It is fun for sure! I've got a 2008 r1200 gsa and I ride the cafe more on weekends.
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Old 03-06-2013, 09:25 AM   #3528
slowpoke69
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stupid question

I'm a new fan of BMW's, and want one BAD! I've looked around the forum and can't locate a guide to terminology,such as /2,/5,/6,etc.

I get that the first 2 or 3 numbers indicate displacement, but what does the /2, etc. indicate? Transmission?

Any direction is appreciated, well, except misdirection.

I know we can tend to be smart asses on here, but usually willing to help a noob like myself. Thanks for your help guys.
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Old 03-06-2013, 09:39 AM   #3529
JonnyCash
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^/2 &/3 are the early bikes, 69 and earlier, I don't know the differences well enough to preach. /5's were 70-73 500, 600, &750cc gauges in the headlight bucket SWB through 72 LWB in 73. /6 were 74, 75, maybe 76 600, 750, 900cc's including R90S, modern gauge cluster, still peanut valve covers. /7 were 76?, 77, 78, 79? 600, 750 &1000cc different rocker gear, square valve covers. They're all a lot alike, but they're all a little different. You can swap stuff all over the place in a lot of cases.
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Old 03-06-2013, 09:54 AM   #3530
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Originally Posted by Captdan View Post


1968 R60/2
Very nice!
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Old 03-06-2013, 10:13 AM   #3531
danedg
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Technically speaking

CaptDan

Your bike technically is a 1968 R60US. It's still sports the /2 motor and frame but the telescoping forks make it the "US" model.

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Old 03-06-2013, 03:50 PM   #3532
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Thanks, I knew she was a US model, I thought it would be a r60/2US? Or just a r60/US is correct? Thanks
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Old 03-06-2013, 03:52 PM   #3533
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Quote:
Originally Posted by Beater View Post
The Dobber. 2/24/13


She's evolving very nicely!
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Old 03-06-2013, 05:19 PM   #3534
disston
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Slowpoke69,

BMW motorcycles have numerous changes through the years. This seems to have always been the case. But practically speaking you want something from 1970 till the end 1995. We call these the Airheads. Any BMW motorcycle is a Beemer, a BMW car is a Bimmer. (If in a position where you may be getting a tip from this guy let him call his car a Beemer all he wants.)(Personal experience)

There is confusion about "When the bike was built" and "The model year" There is a rule that the next years production begins in September but there are exceptions to this rule. And sometimes a last years bike gets titled as the next year because it was sold that year. So be aware there are some weird exceptions to what you may find.

I call the bike by it's model year. My R90/6 was built in September 1974 but it is a 1975 model year bike. This is the most useful way for me to refer to my bike because if I went around calling it a '74 bike it would piss some people off. The '74 bikes do not look like any other model and is easy to spot.

So Model years 1970 through 1973 are /5(s). This was the new engine from BMW called the 247 engine. The /5(s) went through changes with in that group. The earliest ones have a heavier flywheel. The wheel base gets longer for 1973 and is referred to as the LWB (long wheel base). The earlier ones are SWB (short wheel base). These /5 bikes are easy to pick up. They would be a good choice for a nOOb if in good condition. Beings older it may be harder to find one with low mileage though and you should try for low mileage because you are new. If you go to look at any bikes for sale try to get a couple of pics for us. We can tell you so much more from a foto than from what somebody says.

Beginning in 1974 are the /6 bikes. /6 is 1974, 1975 and 1976. There is a new model, the 900cc. The /5 bikes only had a 750cc for the biggest. There will be improvements in many areas all through the /6 years. 1974 is the first year of the 5 speed transmission and this year is the only 5 speed that generally will have the kick starter on the trans. 1974 bikes can be real gems and they can be headaches like anything else. Do not buy a '74 bike if the only reason you are getting it is the kick starter. The electrical starting system on an Airhead is excellant and the kick starter on the 5 speed can break. It will at most be rarely used and if the bike is not in top notch tune will prove to be inferior to push starting if you had a dead battery. If you do end up with a kick starter count your lucky stars just don't try to make it a "requirement".

/6 bikes start the movement towards better braking however the single disk Ate front brake on a /6 or /7 can be the most nauseous item for some riders. They can be improved. Only a mater of how much money you want to through at the problem. If you should get an R90S or an R100S bike and also the RS bikes and RT bikes most of these have dual front discs. Even with dual discs some riders are never satisfied with the Ate floating caliper brake system. Realize these are not modern motorcycles and they just do not have modern "stoppie" brakes.

1975 has a bunch of new electric stuff. Gone are the handlebar switches the /5 inherited from the /2 bikes. The starters and alternators got a little more powerful through the years but '75 is the last year of the 105mm alternator. Next year the alternator will be the 107mm unit. 1975 has an on/off switch for the headlight, '76 is always on.

One of the biggest changes of all time in Airheads happens in 1976. The block of the engine up till now has been bored for the base of a cylinder that has a 97mm spigot. In 1976 the base of the cylinders has a 99mm spigot and the block gets bored for 99mm. This is a big change and will effect us riders that own these machines till the end of time. My 1975 R90/6 can not accept modern Nikelsil 1000cc cylinders and pistons from a more modern bike. There are after market cylinders and stuff but these cost a lot more than used BMW stuff. This issue is probably not a nOOb concern but you'll hear talk about it.

The /7 machines start in 1977 and I think are finished after 1980 (but I'm not sure) The fact is that after /7 there will be no more slashes. In 1978 the tachometer will become electrical instead of mechanical.

The heavy flywheels are gone in 1981 and it is replaced by what is called a clutch carrier. This is much lighter and improves shifting of the overly clunky transmissions we deal with.

I do tend to ramble on a bit. I'll stop here I think. There are many writings on the Web that talk about these bikes. Let us know what is for sale near you. Maybe you can start a thread when you get close to enough money to start looking seriously. BTW. Maybe $3000 as the cost of first bike. You will hopefully spend less than this but prices are a bit dependent on locality and what they are. We will give you guidance about what to get. Might not be the best but we can usually spot the real looser. Also need to know about your personal experiences fixing machines and what tools you have. What kind of work space you have. There will be extra money needed for a machine that is not running. A running machine is a plus.
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Old 03-06-2013, 05:40 PM   #3535
danedg
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Here's mine

Quote:
Originally Posted by Captdan View Post
Thanks, I knew she was a US model, I thought it would be a r60/2US? Or just a r60/US is correct? Thanks
1968 BMW R60US



Sweet bike. They were the last gasp of the /2's. The front forks were carried over to the /5's.
The rest is History
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Old 03-06-2013, 06:20 PM   #3536
woodly1069
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Mmm...R60! The stuff dreams are made of! Well that and a tall blonde to go with it!
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Old 03-06-2013, 08:37 PM   #3537
Captdan
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Quote:
Originally Posted by danedg View Post
1968 BMW R60US



Sweet bike. They were the last gasp of the /2's. The front forks were carried over to the /5's.
The rest is History
Looks great! I've got about 35k original miles... Runs like a sewing machine.
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Old 03-06-2013, 10:00 PM   #3538
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Disston;
Good job on the history.....very well put.....I'll chime in with one of the improvements that persuaded me to trade in my 1980 model on a 1982 and that was the upgrade to Brembo brakes that started in 1981.

Cheers
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Old 03-07-2013, 05:40 AM   #3539
Beater
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Quote:
Originally Posted by woodly1069 View Post
Mmm...R60! The stuff dreams are made of! Well that and a tall blonde to go with it!
Where's she gonna sit?
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Old 03-07-2013, 05:50 AM   #3540
disston
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Originally Posted by Beater View Post
Where's she gonna sit?
Put a cushion on the rear rack. Problem solved! Or if you get one of those from "Chubby Girls" they don't need a cushion, they are a cushion.
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