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R90rider
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Joined: 09/14/2017
Posts: 4

Hello,
This is my 1st post here. I recently made the drive from Bentonville, AR to Chester, IA to pick up a 1976 R90/6. It had been sitting under a cover in a barn for the last 22 years. It turns over & does run but will need lots of attention. I will be chronicling my build with pictures & updates. I already picked up a seat & lower handlebars, cleaned out the inside of the tank, little surface rust but also plan on painting, rebuilding brake, suspension & fuel systems & cleaning & detailing all metal & chrome. I rode a 2006 R1150R a few years ago, had kids & sold it but loved that bike. I'm happy to say kids are older now & I can dedicate some more time to the things that bring a smile to my face. I'm a DIYer by nature and love tinkering and wrenching just like you. Any feedback, questions or helpful comments are greatly appreciated.

My question to you: Where would you start & then move on to?

Here's my R/90 in the corn fields of Iowa during pickup and as it sits in my garage:

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Twocams
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VBMWMO #8750
Joined: 03/16/2014
Posts: 698
I guess my main question is

I guess my main question is why was it sitting so long with low mileage. One of the first things I do is take the heads off to see how much rust from condensation. You have started it already? Some times thats not the best thing to go to an engine that has sat so long.

twocams

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Twocams
69 R69S 03 K1200GT
92 R100RT

R90rider
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Joined: 09/14/2017
Posts: 4
R90 resurrection

I did not start it. The gentleman that sold it to me told me he got it started momentarily. He had an injury years ago and simply covered it, put it away & forgot about it. I will pull the heads to have a look. Thanks

Twocams wrote:

I guess my main question is why was it sitting so long with low mileage. One of the first things I do is take the heads off to see how much rust from condensation. You have started it already? Some times thats not the best thing to go to an engine that has sat so long.

twocams

Twocams
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VBMWMO #8750
Joined: 03/16/2014
Posts: 698
When you pull the heads I

When you pull the heads I would have some push rod seals handy also. Think you have to pull the jugs to replace them. Those are the rubber seals on the bottom, on push rod tubes. They get dry and brittle sitting for years. If they leak you can loose all your oil.

twocams

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Twocams
69 R69S 03 K1200GT
92 R100RT

R90rider
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Joined: 09/14/2017
Posts: 4
R90 resurrection

Excellent, great to know. Thanks

Twocams wrote:

When you pull the heads I would have some push rod seals handy also. Think you have to pull the jugs to replace them. Those are the rubber seals on the bottom, on push rod tubes. They get dry and brittle sitting for years. If they leak you can loose all your oil.

twocams

bmw-mechanic
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southwest germany
Joined: 02/25/2014
Posts: 61
nice project

hello

r90 rebuilding makes fun.

i,ve picked up my r90 2003, rebuild was finished in 2007, now 10 years working well without any problems.

regards

dieter

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khittner
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VBMWMO #8223
Joined: 02/15/2012
Posts: 371
Given the appearance of the

Given the appearance of the bike (replaced/non-OEM front fender, pretty fresh-looking paint on the tank and rear fender, and non-standard seat & cowl for the model) and the PO's long-ago injury and bike disuse, I'd be concerned about the bike's possible crash history. The frame doesn't appear obviously bent in the photos, but airhead frames are fairly weak, they don't take well to tip-overs and get-offs, and damage isn't always obvious. I think I'd go to the trouble to find an airhead mechanic with a frame jig (and you may have to travel a bit for that) to check that all is OK before proceeding further.

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Konrad

Jim K in PA
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Pocono Mountains, PA
Joined: 08/19/2016
Posts: 7
Nice /6

R90rider wrote:

Hello,
This is my 1st post here. I recently made the drive from Bentonville, AR to Chester, IA to pick up a 1976 R90/6. It had been sitting under a cover in a barn for the last 22 years. It turns over & does run but will need lots of attention. I will be chronicling my build with pictures & updates. I already picked up a seat & lower handlebars, cleaned out the inside of the tank, little surface rust but also plan on painting, rebuilding brake, suspension & fuel systems & cleaning & detailing all metal & chrome. I rode a 2006 R1150R a few years ago, had kids & sold it but loved that bike. I'm happy to say kids are older now & I can dedicate some more time to the things that bring a smile to my face. I'm a DIYer by nature and love tinkering and wrenching just like you. Any feedback, questions or helpful comments are greatly appreciated.

My question to you: Where would you start & then move on to?

Here's my R/90 in the corn fields of Iowa during pickup and as it sits in my garage:

That looks like a fantastic find. The front fender is a Craig Vetter "rainy day" piece, a period aftermarket accessory. Very cool, IMO. Looking at the rest of the bike, including the crash bars, valve covers, etc., I doubt that bike had a very hard life or was crashed. Aftermarket shocks may start leaking after a few miles of use due to sitting, so don't be surprised if they do. Change fluids, replace the tires, get it running and enjoy it.

I have a '76 R90/6 also, but in MUCH worse shape. It is a few bikes down the queue, waiting for attention.

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Jim K in PA
Pocono Mountains, PA
1966 R60/2

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