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Author Topic: Warning NGC, BMW R100RT Content  (Read 2455 times)
hinz 57
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« on: September 06, 2008, 12:41:52 AM »
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All,

I know some of your are well versed in air head BMW's.  I have a chance to latch on to a 84 R100RT.  Price currently is at $1600, I've offered $1200.  Here's a pic. Have a few more, but my current ISP is being difficult with photobucket.  Long story.



64,000 miles, paint is faded, bits of rust.  Recently replaced battery and tires. Dunlop 491's.  Junk trunk, Corbin seat, factory bags.  Said to be in good mechanical condition.

I know its late, but I need to make a deal tomorrow if I want it. What's the good buying number?  Is this a good choice for a beemer?  What to do, what to do?

Sorry about the 90 degree rotation Embarrassed

Thanks, Noel
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« Reply #1 on: September 06, 2008, 02:51:40 AM »
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Do it!!!!!!!!!!!!!!!!!!!!!!!!! Pull the trigger!!!!!!!!!!!!!!!!get er done!!!!!!!!!!!!!!!!!! If you wait someone else won't and you will regret it for ever!!!!!!!!!!
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« Reply #2 on: September 06, 2008, 03:23:34 AM »
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Accept the fact you'll probably have to plough another couple of grand into it and it will be a fine touring/commuting barge. At that price its gotta be a winner as long as you go in with eyes wide open.

Pete
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« Reply #3 on: September 06, 2008, 06:50:18 AM »
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There is something magic about the older airheads.  Unless there is some hidden problem, the deal sounds good to me.
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« Reply #4 on: September 06, 2008, 07:34:50 AM »
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1600 is more than fair. I think '84s still had the bad valve seats. Check to see if the seats and valves have been replaced. Otherwise hardly broken in at that mileage. I put 223K miles on my '83 but like PeteR says to make it a really good touring bike it might still need a few more bucks. Brake rotors, suspension, maybe motor mods like dual plugs. They tend to ping even with 93 octane and low compression.

Pete
« Last Edit: September 06, 2008, 07:37:13 AM by PeteS » Logged
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« Reply #5 on: September 06, 2008, 07:42:22 AM »
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I have an '83 R100 that I've owned for 20 or so years.  

Airhead gospel says that you'll need new valves by 75,000 miles.  Mine were pretty beat up by 70k.  No big deal there.  Although the airhead guys were all upset that they didn't last forever. Wink  It was a different crowd than the new beemer guys.

The diode boards can go out, but mine lasted at least 70k miles.  I have a new one and will throw it on when I get around to re-doing the bike.

Progressive front springs, 7.5 weight fork oil, a fork brace and Progressive or Koni rear shocks really improve the handling.  The fork brace is a necessity IMO.  The frame is a flexible old thing but they can really be whipped around pretty good in the curves 'cause they're fairly lightweight. You get used to the occasional wriggle and come to enjoy it.

They really are best if they haven't been messed with.  I have a dual plug ignition system on mine that's going to be tossed in the trash.  I saved all the stock bits and they're going back on.

That series of /7 is the best of the bunch (also just IMO).  They have a better ignition, better brakes, 40mm Bing carbs, and a lighter flywheel than the older models and I never liked the later monoshock models.  I know I'm in the minority, but I'd rather have a '81-84 airhead than a R90S.  Just as fast, maybe faster, and more fun to ride.

My favorite bit on the bike is the pinstriping on the tank.  Back then, Ladies in the west Berlin plant did the striping (or so I was told) and you can see where the brush started to run dry and she redipped it to finish the line.  I always got a kick out of that personal touch.  There was a lot of hand finish work done on the old Gummikuhs.

I had the Beemer as my main ride when I lived in then-speed limit free Montana, and the old girl would hum along at 95 mph all damn day.  In fact, that was it's sweet spot.

The airheads have a great club and tech support similar to what you'll find on this board.  Also, they're not quite as snobby as some of the modern beemer guys.  (don't flame me, I said some.)  I think that's a great price and I'd go for it.

I haven't had my full allotment of coffee this morning, so I apologize for any lack of coherence. Cheesy

John

« Last Edit: September 06, 2008, 07:52:50 AM by john fish » Logged

PeteS
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« Reply #6 on: September 06, 2008, 07:51:54 AM »
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John sums it up very well although I'm not sure why you would want to toss the dual plugged head. When I had mine done I also bumped the CR to about 9.3:1 (from 8.2). The advance unit needs to be modified by limiting the curve. Ideally idle point stays the same but full advance is reduced by 6 degrees. Otherwise its harder to start. I also put 40 mm headpipes on from the stock 38s. Had it dyno'd at Parry Sound Sportbike Rally along with a stock '83 that was there. Mine made 63 RWHP and the stocker 47. I could stay with an oilhead GS to 80 before he pulled away. Ran with that mod for over 150,000 miles no problem.

Pete
« Last Edit: September 06, 2008, 07:57:41 AM by PeteS » Logged
john fish
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« Reply #7 on: September 06, 2008, 08:05:09 AM »
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No offence meant, Pete.  I also had the Cr raised when I had the valves done and put the dual plug kit on.  It never really ran great after that, so I may have done something wrong.  FWIW, I put the dyna ignition, coils and booster on it, then later read that that set-up never did work all that great.  Last I read, and it's been awhile 'cause I haven't really been using the bike for a few years, the hot set-up was some coils from Nissan.  That may have changed, cause the airhead guys are an inveterate bunch of tinkerers.

Glad your ride is doing so good.  My beemer is slated to go up on my bench for a total refurb soon.  After the Suzuki gets a new chain and sprockets, the Jackal gets a thorough lookover, and the Eldo gets it's new wiring harness.  All that comes after I finish lubing the drive shaft and installing the modded cush drive on the V11 sport.  I really am too busy or too lazy to own this many needy bikes. Wink

John

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« Reply #8 on: September 06, 2008, 08:16:27 AM »
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No offense taken for sure. Looks like yours was done by San Jose also. They were pushing the ignition booster which you don't need. If you have the proper coil resistance the stock ignition amplifier works just fine. I did eventually replace the Dyna coils with Acells which did seem to work better, start easier and looked like it had a hotter spark.
  I sold mine a few years ago. The new owner (Canadian) then took it cross the continent. I wouldn't doubt that there are 50K more miles on it. Loved the simplicity and versatility but with that many miles weird things were starting to break like clutch arms and didn't feel as comfortable about taking it on a long trip.

Pete
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« Reply #9 on: September 06, 2008, 08:17:57 AM »
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by poor memory I think thats the last year of the first series RS &RT'S  which have more power than later versions with the  single sided swing arm. that one is missing the lower fairing pieces. I liked mine lots when I had it but Guzzi's from that era have more "soul"?
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hinz 57
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« Reply #10 on: September 06, 2008, 08:22:26 AM »
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Thanks for all the replies!

I will try to get the deal made, it's some distance away, roughly 900 mile round trip.  Though I just went indirectly almost 3000 to buy Cam Lays 02 Cali EV!  I saw the BMW on my return home.  Kind of have to factor in some trip time and $'s.

I wish I knew someone around Concordia Ks, who would like to ride 2 up down to get the bike,  then ride my EV back and I would ride the BMW.  I should probably take the trailer and do a long day trip.

My problem also is to many needy bikes, I really don't need this one, but this is just the sort of bike I was looking to buy before I got all caught up in Guzzi land.

One further question.  Valve issue were mentioned.  Does this model have any other major concerns, especially the cylinders.  I hope they don't have the chrome issues common to early Moto Guzzis.  Any other major known weaknesses.?

Owner claims to have lowers.  I didn't see them.  He said it got to hot to ride with them on where he lives.

Thanks, Noel

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« Reply #11 on: September 06, 2008, 08:28:22 AM »
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I'd buy it for $1600 pretty quick, 1200 is even better.
The bags on it are worth 250.
That is 4-500 pounds of some good metal there. 
Like Guzzi's, that bike has soul and staying power.
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PeteS
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« Reply #12 on: September 06, 2008, 08:35:16 AM »
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Noel, The '84 had Nikasil cylinders. No problems. Mine still had honing marks at 200K. The bike is hot with the lowers. I usually had the lowers on unless I was traveling to the southwest in the summer. I did get a lower center section from a R80Rt which lets more air in. OK for summers in the northeast. In cool months I would put the original center section in for the warmth. Keeping the closed section on in the summer will increase the likelyhood of a melted diode board.

Pete
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« Reply #13 on: September 06, 2008, 08:41:26 AM »
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PeteS:  thanks for the tips on the dual plug.  I'll try it again when I do the refurb.

Noel:  As Pete said, definitely no worries on the cylinders.  Just don't let anyone try to re-bore or re-hone if you do rings etc.  The Nikasil will outlive the rest of the bike.

Go and looky here:

http://www.airheads.org/

Worth joining for the the tech tips.  The club pres use to have a habit of chucking some goofy political stuff in every issue, but it was worth it for the tech stuff.  I haven't been a member for awhile, but will rejoin at some time.

BTW, I'm pretty sure that striping on the fenders and fairing is non-stock.  Tape?

John
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« Reply #14 on: September 06, 2008, 08:49:58 AM »
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Lots take off the lowers, as they are hot.
Major problems have already been laid out.
They are not that major.
If it runs good, it will be a long time at the rate you will ride it with multiple bikes, before head work needs to be done.  At that time, take them off and send them to a good dealer (Bob's?) and have them gone through.
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hinz 57
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« Reply #15 on: September 06, 2008, 09:02:01 AM »
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All,

Thanks for the info.  Just tried again to upload to photobucket.  The wireless here at college is apparently being overloaded with porn movie downloads, at least according to the ITguys.  Maybe some appropriate uses as well.  So I can't get more pix up.

The red striping looked a bit of an after thought to me.  I just am not familiar enough to know.

This bike would certainly require some tinkereing.  I am thinking it might be a bit better for colder weather riding than my EV.



Thanks, Noel
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« Reply #16 on: September 06, 2008, 10:21:46 AM »
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  Go for it!

 If you change your mind down the road I'm betting there would be no trouble offing it.
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« Reply #17 on: September 06, 2008, 10:34:51 AM »
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I would snap that up in a moment - I am looking for an older BMV myself.

I had an R100RT years ago - rode it from the UK to Vienna in February on to my posting to the British Embassy in Vienna - froze my butt off!!!   Bike was great to ride - smooth, comfortable, handled pretty good as well.  Mine had the pull out lights where the air vents are on this one which were a pain, rattled, didnt stay in properly etc.

Good luck and let us know if you get it...I would not lose it for a few hundred dollars.


Lee
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« Reply #18 on: September 06, 2008, 10:46:48 AM »
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What everybody said already. Good bike and good price.

Airheads.org is a good place for info.

Also, the guys at Boxerworks.com have a really good forum with some very knowledgeable people on board.


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« Reply #19 on: September 06, 2008, 10:58:58 AM »
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You've posted to the wrong bunch here if you are trying to get someone to talk you out of it!   Grin  I wouldn't mind an old air cooled twin BMW, except that my LeMans III keeps me more than occupied.  That being said, I think I still might buy it. 
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« Reply #20 on: September 06, 2008, 04:35:37 PM »
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Always like the way the full fairing looked on that bike.  SPIII too!
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« Reply #21 on: September 06, 2008, 09:17:20 PM »
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All!

Well.......... on my way to 3Guzzi's Nebraska rally, the owner of the bmw in question called me and we made a deal for $1500, me to pick it up, cash in hand, next Saturday.  While at the Neb rally, I quizzed a fair number of folks on the bike, price, etc. The consensus was also, BUY IT!  So anyway, I have yet another rode trip scheduled for next weekend.

Interestingly, a gentleman from Germany suddenly appeared, riding, what else, a R100RT.  He was an acquaintance of one of the other rally attendees.  The bike actually belonged to the guy from Lincoln, Neb. area.  He has it on long term loan to the gentleman from Germany.  I had a nice visit with the two of them just before I left.

Great ride today on the new to me EV!  About 280 miles and smiles.  Got lots of  thumbs up on the EV and a fair bit of cr@p about the BMW!  From some, not all!

Anyway, rode trip for me next weekend.  Will post some more pix if I can find a better connection.

Noel
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« Reply #22 on: September 06, 2008, 11:13:09 PM »
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I just recently got a 80 R100T, had some small problems, but I am getting them in hand, and sure enjoy the ride, although, as many know on this board, older bikes are cool, but the new ones have some great advantages, such as: brakes, suspension, and fuel injection.
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« Reply #23 on: September 07, 2008, 08:15:39 AM »
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I just recently got a 80 R100T, had some small problems, but I am getting them in hand, and sure enjoy the ride, although, as many know on this board, older bikes are cool, but the new ones have some great advantages, such as: brakes, suspension, and fuel injection.

I'm thinking along these same lines myself.  This is why I need a newer bike to ride when my LeMans III is acting up. 
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« Reply #24 on: September 07, 2008, 09:26:07 AM »
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Having owned 5 of these beasts and worked on all of them, they are certainly similar in many ways to Guzzis, but IMHO just not up to Guzzi standards Wink

Honestly - going from a BMW to a Guzzi is very interesting on a day-day basis, and if you do your own work you'll find that the Guzzis are more 'car like' than the BMWs, so that is probably a matter of taste.

They do sound good (not as good as Guzzis though!), and I would say you've got yourself TWO real nice motorcycles.

BTW - after bringing home my Eldo in July, I suddenly had a new appreciation for Calis as I've found that the more relaxed riding positions are GREAT for this aging dude. The RT is a great mount in that regard too, and you'll find they handle amazingly well in the twisties; maybe a bit more nimble that our beloved Guzzis.

Have fun, and if you need any BMW help I'll be happy to assist you - just PM me with specifics.

Ron James
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