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Search: Posts Made By: PaulRS
Forum: Airheads Yesterday, 09:45 AM
Replies: 2
Views: 231
Posted By PaulRS
Adjust the valves first to 0.10 in and 0.20 ex...

Adjust the valves first to 0.10 in and 0.20 ex (mm) cold.
Then remove the carb's and do the compression test again.

Might be as simple as maladjusted valve(s).

Paul.
Forum: Airheads 03-01-2015, 04:04 AM
Replies: 15
Views: 420
Posted By PaulRS
All 5-speed boxes have the same gear ratios. ...

All 5-speed boxes have the same gear ratios.

The difference for the different models is made in the final drive.

Paul.
Forum: Airheads 02-28-2015, 08:47 AM
Replies: 23
Views: 1,069
Posted By PaulRS
An piece of allenkey, 5mm and 50 mm long serves...

An piece of allenkey, 5mm and 50 mm long serves me well for 30ish years.
Along with the oem bolt.

And if the rotor won't pop right off, a sharp blow with a hammer on the bolt's head will do the...
Forum: Airheads 02-24-2015, 03:46 PM
Replies: 8
Views: 452
Posted By PaulRS
Early /6 http://i.imgur.com/XwWF1wLl.jpg ...

Early /6

http://i.imgur.com/XwWF1wLl.jpg

Later /6

http://i.imgur.com/CzbpG9Yl.jpg

Just look at the shifters and don't get confused by the rest.
Forum: Airheads 02-21-2015, 08:52 AM
Replies: 3
Views: 362
Posted By PaulRS
Recommanded is a 90/90-18 at the front and a...

Recommanded is a 90/90-18 at the front and a 4.00-18 at the rear.

Going wider at the front makes for heavier steerring and wider at the rear, you can run into all sorts of trouble, heavier...
Forum: Airheads 02-16-2015, 08:35 AM
Replies: 29
Views: 1,113
Posted By PaulRS
You'll need to get back to the basics. So...

You'll need to get back to the basics.

So check valves and, if possible, do a compressioncheck with the carbs removed.
Check the timing.
Recheck the chokes, left and right can be interchanged...
Forum: Airheads 02-15-2015, 05:48 PM
Replies: 138
Views: 9,554
Posted By PaulRS
Those SKF seals really work for friction, or...

Those SKF seals really work for friction, or sticking.
Comparing those against oem seals and you can actually feel the difference in movement.
Most important is the 'break-free' force, with the SKF...
Forum: Airheads 02-15-2015, 03:35 PM
Replies: 138
Views: 9,554
Posted By PaulRS
When I rebuilt my forks, I went with 50 mm...

When I rebuilt my forks, I went with 50 mm spacers to shorten them.

Prutser then adviced me to use low-friction seals, the green ones from SKF, low-visc oil, 5 wt or lower I think, thin as piss....
Forum: Airheads 02-15-2015, 03:08 PM
Replies: 8
Views: 374
Posted By PaulRS
In my book it is a gasket or sealant, not both. ...

In my book it is a gasket or sealant, not both.

So a base gasket, alu or paper, and an O-ring on both top studs.
And a smear of grease on the pushrod tube rubbers to help them in.

Paul.
Forum: Airheads 02-12-2015, 08:57 AM
Replies: 19
Views: 794
Posted By PaulRS
Double image..... Look for worn chain and/or...

Double image.....

Look for worn chain and/or sprockets.
The nose of the camshaft where the auto-advance sit, and in the end the points are running, could be crooked.
It can be straightened.
...
Forum: Airheads 02-12-2015, 05:56 AM
Replies: 569
Views: 87,844
Posted By PaulRS
Nice, very nice bike. Now I need to come...

Nice, very nice bike.

Now I need to come over and see it for real.
(still need to talk to Bas about that motogadget clock.)

Paul.
Forum: Airheads 02-12-2015, 05:51 AM
Replies: 1,016
Views: 86,775
Posted By PaulRS
Not trying to be a smartass here, but it is my...

Not trying to be a smartass here, but it is my experience that over time/miles, the studs creep back to their relaxed position and the play is back again, especially on the older bikes. /5-/6.

And...
Forum: Airheads 02-11-2015, 07:48 AM
Replies: 1,016
Views: 86,775
Posted By PaulRS
C clamp trick doesn't work here, the rocker...

C clamp trick doesn't work here, the rocker end-blocks (sp?) are fixed on the buttons pressed in the head.

Better shim, and put one shim at the lower end, so when a needlebearing fails, no needles...
Forum: Airheads 02-11-2015, 02:41 AM
Replies: 4
Views: 411
Posted By PaulRS
According to MaxBMW you got a R100/T. The 40...

According to MaxBMW you got a R100/T.

The 40 mm Bings are correct, the /103/104 not so.
But that shouldn't be a problem.
...
Forum: Airheads 02-07-2015, 01:38 PM
Replies: 50
Views: 2,468
Posted By PaulRS
A two-legged puller will do the job. Pull the...

A two-legged puller will do the job.
Pull the sprocket and bearing of in one go.

Next you'll see 2 threaded holes in the carrier, at 3 and 9 o'clock.
Those are used to pull the carrier out, a...
Forum: Airheads 02-07-2015, 12:59 PM
Replies: 108
Views: 5,012
Posted By PaulRS
Prutser is refering to a R1200 shock, which has a...

Prutser is refering to a R1200 shock, which has a slightly different set-up.

It, as on many other shocks, has a lower bumper and a wider cup, integrated in the spring seat.
That will compress the...
Forum: Airheads 02-05-2015, 05:21 PM
Replies: 50
Views: 2,468
Posted By PaulRS
It can be done with the engine in the frame. ...

It can be done with the engine in the frame.

Quick run trough the 'how-to'.
Remove front cover.
Remove electrical parts.
Remove camchain cover.

Now it gets tricky, remove camchain, bearing...
Forum: Airheads 02-03-2015, 09:14 AM
Replies: 175
Views: 11,933
Posted By PaulRS
Ok, some notes/measurements I took when building...

Ok, some notes/measurements I took when building my do it all, go anywhere bike.

It started life as a 75/6.
I first lowered the rear swingarm to max, until the U-joint started rubbing, than a tad...
Forum: Airheads 01-31-2015, 06:04 AM
Replies: 342
Views: 33,308
Posted By PaulRS
BMW model years starts after the works...

BMW model years starts after the works holidaymonth of august the previous year.

So model '73 is built from 01-sep-'72.

Paul.
Forum: Airheads 01-21-2015, 04:22 AM
Replies: 19
Views: 1,260
Posted By PaulRS
If you find excessive play again on the rockers,...

If you find excessive play again on the rockers, the recommended way is loosen both top and bottom nut. squeeze together and fasten again.

It is my experience that that works, but doesn't last....
Forum: Airheads 01-19-2015, 05:47 AM
Replies: 30
Views: 1,555
Posted By PaulRS
I'd give Araldite a try. Or something similar...

I'd give Araldite a try.
Or something similar like 2k alu from Loctite.

Vee that crack, clean, clean again and give it a smear of your favorite posion.
Smear liberally and push a fitting,...
Forum: Airheads 01-13-2015, 08:56 AM
Replies: 1,016
Views: 86,775
Posted By PaulRS
Sorry, but you cannot pull the tubes too much...

Sorry, but you cannot pull the tubes too much trough the triples.

There's a small notch, 5 mm from the top of the tube, that needs to be flush with the top of the top triple.
Else your slider...
Forum: Some Assembly Required 01-02-2015, 10:58 AM
Replies: 135
Views: 52,762
Posted By PaulRS
Tiny Tech Team rocks. :thumb I certainly...

Tiny Tech Team rocks. :thumb

I certainly could use a pair of small hands to help me out where my big, fat fingers can't go.
They might even help with chores the wife trows at me. :rofl

Keep...
Forum: Airheads 01-02-2015, 10:45 AM
Replies: 71
Views: 3,384
Posted By PaulRS
Not an interweb hearsay, but in fact the approved...

Not an interweb hearsay, but in fact the approved method.
Heat is your friend here.

But a few cuts with an angle grinder and a cold chisel works for me every time.

An angle grinder in the...
Forum: Airheads 12-26-2014, 05:42 PM
Replies: 19
Views: 1,064
Posted By PaulRS
When installing new O-rings I always use a little...

When installing new O-rings I always use a little grease.
In aviation we use a product called 'Park-O-lube', but any grease will do just fine.

All other parts can be washed in a solvent, but...
Forum: Airheads 12-26-2014, 05:28 PM
Replies: 13
Views: 755
Posted By PaulRS
To remove the rotor, take a 5 mm allankey and...

To remove the rotor, take a 5 mm allankey and grind off a length of 50 mm.

Remove the bolt holding the rotor and insert the cut-off piece of the allan key.
Put the bolt back in and fasten, the...
Forum: Airheads 12-26-2014, 04:59 PM
Replies: 33
Views: 2,467
Posted By PaulRS
Sizes, what sizes? I recently got me a spare...

Sizes, what sizes?

I recently got me a spare rear wheel (for free) with the spline cup removed.
With it came a new cup.

Now the holes in the cup measures 6,35ish mm, using the shank of a 1/4"...
Forum: Airheads 12-21-2014, 07:16 AM
Replies: 1,526
Views: 105,192
Posted By PaulRS
I got one of those as my daily runner, 213 kkm...

I got one of those as my daily runner, 213 kkm and still going strong.
One of the best allrounders. :D
Underestimated though. :rolleyes:

Paul.
Forum: Airheads 12-21-2014, 04:21 AM
Replies: 1,526
Views: 105,192
Posted By PaulRS
This affected early models R1150xx only. ...

This affected early models R1150xx only.

Romour has it that a batch of crooked gearbox covers made it past quality control.
The input shaft did not align properly with the clutchplate hub,...
Forum: Airheads 12-06-2014, 05:45 AM
Replies: 606
Views: 151,125
Posted By PaulRS
The brown wire from the Acewell needs a constant...

The brown wire from the Acewell needs a constant +
To feed the clock.

Paul.
Forum: Airheads 12-05-2014, 01:41 PM
Replies: 112
Views: 12,879
Posted By PaulRS
Ok, lets have it then. What is the stuff...

Ok, lets have it then.

What is the stuff this pistons are made of, aluminium mixed with what?
And the %% of the added material?

And don't worry, I will not put the kettle on and copy your brew...
Forum: Airheads 12-04-2014, 01:50 PM
Replies: 112
Views: 12,879
Posted By PaulRS
Ok, no pinging marks. So that rules out bad...

Ok, no pinging marks.
So that rules out bad fuel and a problem with the ignition.

No excess oil consumption or oil in the combusting chamber rules that one out also.

The open petcock can be a...
Forum: Airheads 12-04-2014, 12:23 PM
Replies: 112
Views: 12,879
Posted By PaulRS
Ok, then, let's see if the collective can figure...

Ok, then, let's see if the collective can figure out what happened.
First, all things mechanic can break, specially when tuning, no matter how much experience one has, shit happens.

More...
Forum: Airheads 12-03-2014, 07:29 AM
Replies: 112
Views: 12,879
Posted By PaulRS
Why? The word is already out the engine...

Why?

The word is already out the engine blew.
That shit happens, important is to find out why, and how it is dealt with.

This way rumour starts.:cry

Paul.
Forum: Airheads 12-03-2014, 07:21 AM
Replies: 175
Views: 11,933
Posted By PaulRS
The U-joint rubs at the 6 o'clock position, where...

The U-joint rubs at the 6 o'clock position, where the step is, about 20 mm in.

It is the driven part of the U-joint, due to the steep angle.
The bell on the other end of the driveshaft isn't...
Forum: Airheads 11-30-2014, 02:57 PM
Replies: 81
Views: 3,564
Posted By PaulRS
You heat up the casing tube, but the rest of the...

You heat up the casing tube, but the rest of the alloy casing acts as a big heatsump, a very big heatsump.

Unless you can get that area heated up to around 120-150 C, you ain't getting anywhere.
...
Forum: Airheads 11-30-2014, 10:40 AM
Replies: 11
Views: 753
Posted By PaulRS
A non-runner R50/5 for 2200? Is that US or CAN...

A non-runner R50/5 for 2200?
Is that US or CAN $, still steep in my book.

As Disston said, lots of parts to replace to go up to R75 or R90 spec, but at a price.

I'd rather find an early R80...
Forum: Airheads 11-30-2014, 07:56 AM
Replies: 175
Views: 11,933
Posted By PaulRS
What limits swingarm travel firts is the bell...

What limits swingarm travel firts is the bell hitting the cross member.
Once you make room there, each which way you choose, the U-joint rubbing is next.

You can then take out a piece of the...
Forum: Airheads 11-30-2014, 07:45 AM
Replies: 42
Views: 4,228
Posted By PaulRS
Yes, I fitted a DRZ400S front end as well. ...

Yes, I fitted a DRZ400S front end as well.

How I proceded;
Lowered the swingarm untill the U-joint rubs, measured the shock lenght at 387 mm.
Made a strut from a piece of steel tube at 380 mm....
Forum: Airheads 11-29-2014, 09:37 PM
Replies: 175
Views: 11,933
Posted By PaulRS
I had the torch ready, but as the swingarm being...

I had the torch ready, but as the swingarm being mild steel only, it deformed easy enough cold.
It didn't take much force either. :huh

Just kept leaning until the U-joint hit.

Some take out a...
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