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Old 04-23-2010, 11:19 AM   #136
bkrmoto
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Quote:
Originally Posted by AntonLargiader
Wow. You guys are really hot on this bike.

I see a non-runner, sitting two+ years, weakest 5-speed transmission ever, no Nikasil and very few used cylinder options (2 years only, ever, on the small R90 cylinders) and 78k on existing ones, probably rusted seat pan and frame rust.

OK, the S fairing and luggage are nice.

It's probably an OK value but why the hysteria?
Well, at least it doesn't have the single solid disc brake from a '74 R90/6. Come to think of it, other than the engine/tranny, how much of this bike is actually a '74 R90/6?
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Old 04-23-2010, 01:28 PM   #137
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I think that everyones excited about a good looking bike at a low price. If the asking price is $1600, I wouldn't expect t pay that much.

I'm not one to get up early over a 74/6 (I like the 1976 model much better!) but if a new owner is willing to do some work, it's a great buy-in, that'll get you into BMW Land with a hands-on knowledge of exactly whats in the bike.

Of course, theres always the option of parting it out for a profit....
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Old 04-23-2010, 01:38 PM   #138
AntonLargiader
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Quote:
Originally Posted by Cordless
Do your comments apply specifically to the '74 R90 or to the R90 series as a whole? Specifically about the small R90 cylinders and the weakest 5 spd ever.
'74 and to some extent '75, all models.

'74 was cool because it had the /5 switches. Otherwise it had lots of one-year-only transmission mistakes, sometimes the potentially deadly 10mm flywheel bolts (were never supposed to be used with 900cc but some got out), probably more. '75 fixed much of that but still has the pre-76 cylinder spigot. '76-on can take Nikasil with few to no modifications.

But it's a slippery slope. The /7 was just SO much better in so many ways. And of course in '81... and then '85... and then...
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Old 04-23-2010, 01:50 PM   #139
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One other negative about the 74 bikes, there's no clean way to do a handlebar mounted Master cylinder conversion due to the /5 style controls.
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Old 04-23-2010, 02:05 PM   #140
blaine.hale
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Quote:
Originally Posted by wirewrkr
One other negative about the 74 bikes, there's no clean way to do a handlebar mounted Master cylinder conversion due to the /5 style controls.
I'm looking at just buying the controls off a later model that already have a MC for my 74. I know the killswitch won't work without me changing a bit but still...it's almost a direct plug and play.
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Old 04-23-2010, 02:36 PM   #141
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Originally Posted by Lornce
I only just figured out your user name reads "my mind's okay".

I always thought it was "my mind sock".
Spooky, same here.
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Old 04-23-2010, 02:53 PM   #142
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Oh, btw, are these 'merican dollars?
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Old 04-23-2010, 03:23 PM   #143
Ladyrider247
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Quote:
Originally Posted by Lornce

Heya, Carol.

You leaving for Paris soon?

Oui..demain soire! I'll send you a postcard!
Congrats on the bike! I know you will enjoy it!

Au Revoir mon ami,
Carole
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Old 04-23-2010, 05:15 PM   #144
Renner
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Quote:
Originally Posted by Ladyrider247
Congrats on the bike! I know you will enjoy it!
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Old 04-24-2010, 12:01 AM   #145
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Quote:
Originally Posted by Ladyrider247
Oui..demain soire! I'll send you a postcard!
Congrats on the bike! I know you will enjoy it!

Au Revoir mon ami,
Carole

Merci, mon ami.



Bon voyage!

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Old 04-24-2010, 12:55 AM   #146
Renner
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looking truly beautiful from here.

I foresee further wrenching joy in your future.

You no longer have that sweet R60/5?
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Old 04-24-2010, 07:37 AM   #147
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You made the right decision! That gas tank alone is worth three or four hundred bucks. And it's got the S bodywork along with dual discs - it's practically an S without the Dellortos.

Sure, the 74s had weak trannys - but unless ridden hard, they tend to hold together. Transmissions on these bikes are a weak link anyway, so have it rebuilt at some time with newer components. Anyone seriously into the airheads will have a spare trans in the shop, as well as toting an alternator rotor and diode board on trips. It's just one of those things.

Those 74s are the next ones to go up in price - the /5s already have - and there are a lot of cool things about them - the simple switch gear, the levers, alloy turn signals, and their simplicity.

By now, most of the failure items have either been replaced, or repaired, so I wouldn't worry about that.

No, I think you got a great deal. You'll enjoy this one!
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Old 04-24-2010, 07:53 AM   #148
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Ya think?

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Old 04-24-2010, 08:29 AM   #149
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Quote:
Originally Posted by blaine.hale
I'm looking at just buying the controls off a later model that already have a MC for my 74. I know the killswitch won't work without me changing a bit but still...it's almost a direct plug and play.
What gave you the impression that it's a plug'n'play ?
That couldn't be farther from the truth. Start with the headlight circuit.
74 has no relay, all of the load is carried through the old school switch.
You'll need to do some serious reengineering to do this.
The circuit board is a one year only for 74. etc.
It's all do-able but it aint gonna be "simple" by ANY stretch of the imagination.
Actually, adding the kill switch circuitry may be one of the easier things to do in the mod.
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Old 04-24-2010, 08:31 AM   #150
wirewrkr
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Congrats Lornce.
If at some point you do decide to do a transmission, save yourself some aggravation and don't attempt to build yours (if it is the original 74).
Find a 75-80 core and do that one instead.
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