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Search: Posts Made By: bmwrench
Forum: Old's Cool Yesterday, 06:20 PM
Replies: 14
Views: 788
Posted By bmwrench
what car, your saddlebags are Krauser Starlets. ...

what car, your saddlebags are Krauser Starlets. They're actually pretty good bags.
Forum: Airheads 09-19-2014, 07:56 PM
Replies: 81
Views: 3,184
Posted By bmwrench
No, oil passes through the hole continuously. I...

No, oil passes through the hole continuously. I think there's some confusion how the oiling in these motors works. Oil is pumped around the from cam bearing, then up to the front main. This is...
Forum: Airheads 09-19-2014, 05:17 AM
Replies: 81
Views: 3,184
Posted By bmwrench
Unfortunately, loss of the pin does affect oil...

Unfortunately, loss of the pin does affect oil pressure; it creates a large internal leak, so less oil reaches the rest of the motor. I had to attend to one of these last week. The rod bearings...
Forum: Airheads 09-17-2014, 06:33 PM
Replies: 24
Views: 1,346
Posted By bmwrench
You'll have to ask PJ about that. San...

You'll have to ask PJ about that.

San Jose BMW used to make a brace that used those two unused holes, but I'd be uncomfortable doing that. I've seen a brace similar to the one I made that...
Forum: Airheads 09-16-2014, 05:39 PM
Replies: 10
Views: 533
Posted By bmwrench
If worse comes to worst, you can drill the head...

If worse comes to worst, you can drill the head off of the bolt. I'd put the other bolt back in while drilling. You will need a sharp bit, perhaps several of them. Once the head is off, you will be...
Forum: Airheads 09-16-2014, 05:34 PM
Replies: 24
Views: 1,346
Posted By bmwrench
Yes, there was a lot more vibration. That is one...

Yes, there was a lot more vibration. That is one of the penalties of a stiffer frame. For me, it was an excuse to rebalance the motor!
Forum: Airheads 09-16-2014, 05:30 PM
Replies: 937
Views: 54,685
Posted By bmwrench
I think you were unfair in not sending both heads...

I think you were unfair in not sending both heads back to Peter and letting him see what went wrong. If a guy screws up once (if indeed he did), he's human. If he does it twice, he doesn't deserve...
Forum: Airheads 09-16-2014, 05:20 PM
Replies: 24
Views: 1,346
Posted By bmwrench
I had an R100/7 that became a rolling test lab. ...

I had an R100/7 that became a rolling test lab. Every cam I could find or could regrind was tried. Every chassis mod was tried. Anything I could afford was tried. I'm telling you this so you'll...
Forum: Airheads 09-15-2014, 05:31 PM
Replies: 14
Views: 536
Posted By bmwrench
The trouble with using pistons from another motor...

The trouble with using pistons from another motor is that the valve cutaways in a BMW motor are in line with the wristpins whereas almost everybody elses are 90 from the pin. The least expensive...
Forum: Airheads 09-10-2014, 08:20 PM
Replies: 10
Views: 593
Posted By bmwrench
If the u-joint is not excessively notchy-a lot of...

If the u-joint is not excessively notchy-a lot of them are slightly notchy and go on for years-you can press the bearings back in. You can do this with a vice and a socket.
Forum: Airheads 09-10-2014, 08:14 PM
Replies: 81
Views: 3,184
Posted By bmwrench
You probably just have a bad switch. Replace it...

You probably just have a bad switch. Replace it and see if the light goes out. If it doesn't, you'll need to test your oil pressure.

Once in a great while, the pump pick up breaks or falls off....
Forum: Airheads 09-09-2014, 07:40 PM
Replies: 14
Views: 574
Posted By bmwrench
The sliding gear on the intermediate shaft...

The sliding gear on the intermediate shaft controls 3rd and 4th gear. They'll work for a long time on the three remaining dogs, but eventually another dog breaks off, and the gearbox begins jumping...
Forum: Airheads 09-09-2014, 07:18 PM
Replies: 27
Views: 1,006
Posted By bmwrench
That's pretty much all there is to it. The...

That's pretty much all there is to it. The silver is sprayed, then the black is fogged on. The definition is done by turning the fan on the gun down as small as possible. You then stand back and...
Forum: Airheads 09-08-2014, 07:02 PM
Replies: 9
Views: 594
Posted By bmwrench
The first 860cc kits that I remember were sold by...

The first 860cc kits that I remember were sold by Reg Pridmore, but I'm sure they were available elsewhere. I wasn't happy with what was available from the usual sources, so I began selling "1050"...
Forum: Airheads 09-08-2014, 06:56 PM
Replies: 38
Views: 1,692
Posted By bmwrench
I've seen a number of gearboxes leak oil after...

I've seen a number of gearboxes leak oil after using BMWs own synthetic. This was back when Valvoline was making it for them. Every oil blender uses their own formula, so YMMV.
Forum: Airheads 09-08-2014, 06:51 PM
Replies: 27
Views: 1,006
Posted By bmwrench
I would imagine that Bob Wark can do a smoke job...

I would imagine that Bob Wark can do a smoke job as well. You saw his thread on painting the R100RS, didn't you?

In this neck of the woods (VT), Ray Atwood does beautiful work.

Smoked...
Forum: Airheads 09-08-2014, 06:42 PM
Replies: 6
Views: 527
Posted By bmwrench
The crimping is done to keep the cam from moving...

The crimping is done to keep the cam from moving back and forth. This locates the magnet in place. It probably isn't really necessary, but it can't hurt.

Always use a strobe-type timing...
Forum: Airheads 09-07-2014, 06:58 PM
Replies: 10
Views: 593
Posted By bmwrench
I would suspect a worn cush drive in the...

I would suspect a worn cush drive in the driveshaft.
Forum: Airheads 09-07-2014, 06:56 PM
Replies: 9
Views: 594
Posted By bmwrench
Sometimes you can get away with boring them that...

Sometimes you can get away with boring them that big, sometimes you can't. That's why 860cc kits were "invented". Most boring shops will charge extra for removing that much material.
Forum: Old's Cool 09-06-2014, 07:30 PM
Replies: 4
Views: 379
Posted By bmwrench
The bag fits between the fairing and gas tank....

The bag fits between the fairing and gas tank. There should be a strap on the underside to go under the fairing cross brace.
Forum: Airheads 09-06-2014, 07:23 PM
Replies: 39
Views: 1,589
Posted By bmwrench
Was the o-ring there?

Was the o-ring there?
Forum: Airheads 09-06-2014, 07:21 PM
Replies: 30
Views: 1,183
Posted By bmwrench
To return to the original question, a square...

To return to the original question, a square rubber seal strip around the points compartment is supposed to keep water out, and the hose through which the points wire passes allow any water out. ...
Forum: Airheads 09-04-2014, 07:09 PM
Replies: 11
Views: 587
Posted By bmwrench
BMW originally put a seal on one side of the rear...

BMW originally put a seal on one side of the rear intermediate shaft bearing. This was to keep the oil directed into the rear of that shaft from leaking out through the bearing. When the R100GS was...
Forum: Airheads 09-03-2014, 07:09 PM
Replies: 11
Views: 430
Posted By bmwrench
Pull the stator and reinstall the new rotor. ...

Pull the stator and reinstall the new rotor. Start the motor and observe the rotor for run out. You may find that it is not machined concentrically.

It is possible to cock the stator on...
Forum: Airheads 09-02-2014, 07:25 PM
Replies: 41
Views: 2,081
Posted By bmwrench
I was too lazy to read the entire thread, but an...

I was too lazy to read the entire thread, but an unbalanced front tire will cause the instruments to shudder.

Excessive vibration in an R100 can be caused by too high an oil level; just an...
Forum: Airheads 09-02-2014, 07:19 PM
Replies: 10
Views: 524
Posted By bmwrench
All R90s had 40mm exhaust valves. All R75s and...

All R90s had 40mm exhaust valves. All R75s and R80s had 38mm. The heads are identical (for a given model year), even to the counterbore for the exhaust seat. In other words, if you want to use R75...
Forum: Old's Cool 08-31-2014, 06:32 PM
Replies: 15,367
Views: 8,887,971
Posted By bmwrench
Yeah, look at how many of those bikes have blown...

Yeah, look at how many of those bikes have blown up or caught fire! :rofl
Forum: Airheads 08-31-2014, 06:29 PM
Replies: 19
Poll: NO Tool Tray
Views: 1,262
Posted By bmwrench
Put the oversized tools in he bottom of your tank...

Put the oversized tools in he bottom of your tank bag. Your bike will know that you have all the tools needed for roadside repairs, and won't break.
Forum: Airheads 08-31-2014, 06:26 PM
Replies: 27
Views: 1,158
Posted By bmwrench
I know that it's painfully expensive, but you...

I know that it's painfully expensive, but you probably don't want to do this job twice. Renew all the clutch parts: Spring, pressure plate, friction plate and pressure ring.

The pushrod seal is...
Forum: Airheads 08-31-2014, 11:00 AM
Replies: 19
Views: 928
Posted By bmwrench
The lifters are oiled by splash and drainage from...

The lifters are oiled by splash and drainage from the heads

Did the front bearing locking pin show up in your drain oil?
Forum: Airheads 08-31-2014, 10:43 AM
Replies: 19
Views: 928
Posted By bmwrench
What year is the motor?

What year is the motor?
Forum: Airheads 08-30-2014, 06:53 PM
Replies: 27
Views: 1,158
Posted By bmwrench
The clutches on the '81 on bikes are superb, and...

The clutches on the '81 on bikes are superb, and slippage very unusual. Your plate looks glazed; how does the front seal on the gearbox look?
Forum: Airheads 08-29-2014, 07:08 PM
Replies: 13
Views: 951
Posted By bmwrench
If I had the choice, it would be to bore the...

If I had the choice, it would be to bore the cases, but I suspect that this would take a lot of set up time for the machinist, while turning the cylinders is a reasonably easy task.
Forum: Airheads 08-28-2014, 07:23 PM
Replies: 27
Views: 2,000
Posted By bmwrench
"My favorite oilhead is the R1100S" Me,...

"My favorite oilhead is the R1100S" Me, too!
Forum: Airheads 08-28-2014, 07:21 PM
Replies: 2
Views: 239
Posted By bmwrench
The second was used from '77 on, although as...

The second was used from '77 on, although as Disston says, they are interchangeable.
Forum: Airheads 08-28-2014, 07:20 PM
Replies: 36
Views: 1,413
Posted By bmwrench
BMW has played their usual supersession game with...

BMW has played their usual supersession game with this part. Try this P/N: 33 12 1 230 356. If it's really NLA, I have some in stock.

There can be more to this repair than replacing the...
Forum: Airheads 08-28-2014, 05:13 AM
Replies: 31
Views: 1,979
Posted By bmwrench
Not to had to your troubles, but you should...

Not to had to your troubles, but you should disassemble the cylinder heads. Valves contacting pistons, unless the motor is over-revved, frequently means sticking valves, something Black Diamonds are...
Forum: Airheads 08-27-2014, 06:45 PM
Replies: 13
Views: 951
Posted By bmwrench
Yep. It's been done a lot.

Yep. It's been done a lot.
Forum: Airheads 08-26-2014, 08:19 AM
Replies: 18
Views: 988
Posted By bmwrench
Surprisingly, the 654 is stiffer than the 360. ...

Surprisingly, the 654 is stiffer than the 360. When these bikes were current, some of our faster riders had stains all over the carbs and sides of the bikes. We went through the usual Hell trying...
Forum: Airheads 08-25-2014, 07:31 PM
Replies: 31
Views: 1,979
Posted By bmwrench
Any crank with 11mm flywheel bolts will work. ...

Any crank with 11mm flywheel bolts will work. I've seen R90s as early as '74 with this size bolt, although they could have had their cranks replaced. Sort of officially, this crank was used from...
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