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Old 11-08-2010, 03:59 PM   #31
c1skout
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When I rebuilt the carbs on my brother's r75 it wouldn't start either. Eventually I opened up the idle screws a bit and away it went.
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Old 11-09-2010, 06:33 PM   #32
fadingfastsd OP
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I've got the starter out and on the bench. It will spin easily and freely on the bench. I'm assuming this still isn't an indication of a good starter, as it could have high resistance and not be able to spin full speed when it has the load of the engine on it.

Time to tear this thing apart! Thanks for the links Renner I'll be following those guides to clean this thing up.

I'll be back!

(man I got more than I bargained for with this bike....)
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Old 11-09-2010, 08:08 PM   #33
Renner
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Quote:
Originally Posted by fadingfastsd
(man I got more than I bargained for with this bike....)
I believe you'll be happy with the results.

www.realoem.com is a useful resource.
After "click here" to enter, put your bike's serial number in the drop-down window and you will be taken to a complete illustrated parts catalog for your bike.

It's likely your starter's bushings are worn. As they are plain bearings, when worn to an oval the shafts that turn in them tend to bind and load the starter motor unnecessarily.

IIRC there are three bushings: items 19 and 22 (2x) seen here
http://www.realoem.com/bmw/showparts...47&hg=12&fg=15

Other than that, the starter may need no more than a good cleaning. Mine has been trouble free since overhaul roughly six years ago.
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Old 11-10-2010, 01:31 PM   #34
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Well I started pulling it apart this morning. I may or may not have destroyed the solenoid....shit.

Anybody have a working R90 starter they'd like to sell?
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Old 11-10-2010, 02:33 PM   #35
Renner
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Old 11-10-2010, 07:25 PM   #36
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Thanks Renner. I emailed the guy about starters. He'll be in San Diego next week. And has good working starters for $125.

I was hoping to spend less...like $50 or so.
I've found alot of them on ebay.

The problem is I'm out of full-time work, paying the bills from consulting, and I am BROKE!
Need a starter as cheap as possible.
Go figure, how can I be 27, a BS in Electrical Engineering, and not be able to get a damn job? I hate this economy, and California specifically....(done ranting)

Does anybody have a good working starter to sell? It can look like hell!
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fadingfastsd screwed with this post 11-10-2010 at 07:33 PM
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Old 11-10-2010, 11:17 PM   #37
Renner
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how bad is the solenoid?

Have you applied at GA in Poway?
Lots of 'lectricity there.
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Old 11-10-2010, 11:57 PM   #38
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Yup, quite a few friends working there. I apply for jobs there every week.
Even with their reference it's hard to get an interview scheduled.
Tons of people applying for every job.
It's especially hard in engineering, because you have older engineers with tons more experience, applying for the same jobs as younger engineers, willing to take them for less pay. Kinda screws us guys a few years out of college.

The solenoid is pretty screwed up when I tried to take the cap off.
I think I disconnected it internally, not sure yet.
I'll check it out more tomorrow.
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Old 11-18-2010, 05:46 PM   #39
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Starter is completely apart. Trying to fix it, we'll see.
Had to get a hand-impact driver, the kind you hit with a hammer, to loosen up the flathead screws holding the solenoid to the starter body.

Finally off. Everything looks of but very dirty.
Cleaning it all up now.

Some advice - DONT take the metal clip out to remove the bendix from the shaft. It's almost impossible to get the clip and retainer back in place. Still working on that. Theres not even anything to clean once you remove it.
haha oh well.

I'll report back soon on the starter after the cleanup!

-Evan
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Old 11-18-2010, 07:58 PM   #40
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The "bendix" has two bushings in it, which wear and can be replaced. To get the clip back in, pull against the ring which locks it in place with a small two-jaw puller-the ones meant for pulling car battery terminals work nicely-while working the clip back into it's groove.
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Old 11-18-2010, 11:37 PM   #41
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OK guys, got the starter all apart, cleaned and put back together.
Everything looked good inside. No damage, bushings looked fine.

Starter spun fine on the bench again.

Put the starter back in the bike ....and.....exact same thing.
Bike will barely crank over.

I tested with bike battery, and good car battery, jumping starter directly (bypassing starter relay).

Check out this video I took of the starting:
http://www.youtube.com/watch?v=U3R7z8_0FY4

So...looks like a bad starter to me. What do you guys think?
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Old 11-18-2010, 11:46 PM   #42
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Quote:
Originally Posted by fadingfastsd

Just couldn't stand looking at the high bars any more

I feel your pain
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Old 11-19-2010, 02:59 AM   #43
Pezz_gs
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If I may . . .

I doubt a 12AH battery would crank a Bosch starter that efficiently

Thats half the stock battery specs. May have given the 12AH one a bit of stress trying to???

The old Bosch sure pulls some current.

I have a 20 month old odyssey that can loose it ounch with the Bosch in my G/S
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Old 11-19-2010, 05:26 AM   #44
Jasper ST4
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The 12a battery will probably be a bunch of grief but I watch the video and the car battery isn't doing it for now. Does the engine spin freely by hand without the spark plugs? Does the starter spin freely without a load?
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Old 11-19-2010, 08:31 AM   #45
Renner
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Quote:
Originally Posted by Renner
It's likely your starter's bushings are worn. As they are plain bearings, when worn to an oval the shafts that turn in them tend to bind and load the starter motor unnecessarily.
Any luck replacing the bushings/plain bearings?
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