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Search: Posts Made By: BOETJE
Forum: Airheads 05-21-2015, 12:01 PM
Replies: 15
Views: 765
Posted By BOETJE
Yes, that seems to be the case

Yes, that seems to be the case
Forum: Airheads 05-19-2015, 01:14 PM
Replies: 15
Views: 765
Posted By BOETJE
Cruise is little load (small throttle openings)...

Cruise is little load (small throttle openings) At WOT you don't see any "unbalance" any more
Forum: Airheads 05-19-2015, 12:22 PM
Replies: 15
Views: 765
Posted By BOETJE
Done that with the "Harmonizer". The "unbalance"...

Done that with the "Harmonizer". The "unbalance" disappears very quickly with increasing throttle openings, even at cruising at say 100 km/h.
Forum: Airheads 05-02-2015, 08:34 PM
Replies: 13
Views: 607
Posted By BOETJE
I'll swap the speedometer with you : mine is in...

I'll swap the speedometer with you : mine is in MPH....:evil
Forum: Airheads 05-01-2015, 03:43 PM
Replies: 8
Views: 600
Posted By BOETJE
You're welcome.

You're welcome.
Forum: Airheads 04-30-2015, 12:26 PM
Replies: 8
Views: 600
Posted By BOETJE
No the other way around The second picture...

No the other way around

The second picture shows "out" : the adjuster away from the center of the engine
The fourth picture shows "in" : towards the center of the engine.
If Crane cams gives...
Forum: Airheads 04-29-2015, 08:00 PM
Replies: 8
Views: 600
Posted By BOETJE
Airhead rocker ratio...again.....

A couple of years ago , there was a discussion her about rocker ratio’s.
As per usual, it turned into a shit throwing contest, and on the end nobody was the wiser.
I’ve heard the number 1.39...
Forum: New Zealand 04-16-2015, 12:33 PM
Replies: 92
Views: 11,094
Posted By BOETJE
2000 ppm equals 0.2 % 2 % equals 20000 ppm ...

2000 ppm equals 0.2 %

2 % equals 20000 ppm

So which one is it ?

20000 ppm sounds like a lot....
Forum: Airheads 04-08-2015, 08:18 PM
Replies: 359
Views: 41,636
Posted By BOETJE
1982 R100CS , I think it has 36 mm legs

1982 R100CS , I think it has 36 mm legs
Forum: Airheads 04-08-2015, 03:27 PM
Replies: 359
Views: 41,636
Posted By BOETJE
Are you still doing those billet top yokes for...

Are you still doing those billet top yokes for airheads ?
Forum: Old's Cool 03-25-2015, 07:51 PM
Replies: 6
Views: 631
Posted By BOETJE
If oil sprays out, then they are obviously an...

If oil sprays out, then they are obviously an emulsion shock, and can only be mounted one way. My guess would be with the valve on top.
If you want to release pressure, you shouldn't do this...
Forum: Airheads 02-23-2015, 03:06 PM
Replies: 359
Views: 41,636
Posted By BOETJE
I like how you did your bell mouths. I did that...

I like how you did your bell mouths.
I did that on Mikuni carbs on my XJ 650.
I later discovered that Yamaha did it similar on the XJ 900 Diversion and other models from the 90's.
Forum: Airheads 01-15-2015, 05:57 PM
Replies: 83
Views: 3,579
Posted By BOETJE
Spot on Andrew.:thumb

Spot on Andrew.:thumb
Forum: Airheads 01-15-2015, 02:02 PM
Replies: 83
Views: 3,579
Posted By BOETJE
So which one is it ? Wouldn't that be...

So which one is it ?



Wouldn't that be just Newton, or Kgf or such ?
( Friction Force = normal Force times friction coefficient )
Forum: Airheads 01-06-2015, 01:21 PM
Replies: 1,526
Views: 117,520
Posted By BOETJE
This thing works well : ...

This thing works well :
http://www.beemerboneyard.com/bmwafxied1150.html
There is a whole long threads about it in oil heads
The guy who designed it did a lot of reasearch.
Read his posts about...
Forum: New Zealand 12-23-2014, 04:20 PM
Replies: 347
Views: 38,895
Posted By BOETJE
Yes I was surprised as well. I've got some...

Yes I was surprised as well.
I've got some lighter Ohlins springs , for which I made adaptors so they fit Koni's if you are so inclined
Forum: New Zealand 12-23-2014, 02:33 PM
Replies: 347
Views: 38,895
Posted By BOETJE
Looks as if you got your Christmas present early...

Looks as if you got your Christmas present early this year !
Are they an emulsion shock , or do they have a separation piston ?
I just got some new Ikons for my CS. Anything else looks a bit out...
Forum: Airheads 12-21-2014, 05:03 PM
Replies: 1,526
Views: 117,520
Posted By BOETJE
6 km/l is about MotoGP territory I just keep...

6 km/l is about MotoGP territory
I just keep forgetting how fast you guys are.....
Forum: Airheads 12-21-2014, 02:47 PM
Replies: 1,526
Views: 117,520
Posted By BOETJE
16 US mpg = 6.8 km/lit 16 UK mpg = 5.66...

16 US mpg = 6.8 km/lit
16 UK mpg = 5.66 km/lit

Non of my 1150's ( GS, R, or RS) sucked that much fuel.
Granted I don't ride that fast , but that's an absurd fuel consumtion
Forum: Vendors 12-05-2014, 03:56 PM
Replies: 74
Views: 8,047
Posted By BOETJE
In the eighties we did a lot of testing to get a...

In the eighties we did a lot of testing to get a handle on this.
That included measuring at the gear box out put, and then fitting the engine in the frame, and put it on the rear wheel dyno.
We...
Forum: Airheads 11-10-2014, 07:24 PM
Replies: 359
Views: 41,636
Posted By BOETJE
http://rubberchickenracinggarage.com/bushings.html...

http://rubberchickenracinggarage.com/bushings.html

These ?
Forum: Airheads 11-07-2014, 04:12 PM
Replies: 93
Views: 8,013
Posted By BOETJE
No, the "C" designations are pretty much...

No, the "C" designations are pretty much standard. It's a DIN thing I believe.
My Timken catalogue shows it as well
Gospel ? But I take your word as gospel as well SS .....!
Are you telling me I...
Forum: Airheads 11-07-2014, 02:21 PM
Replies: 93
Views: 8,013
Posted By BOETJE
From the SKF Bearing catalogue p 96 : C1...

From the SKF Bearing catalogue p 96 :
C1 clearance less than C2
C2 clearance less than Normal
C3 clearance greater than Normal
C4 clearance greater than C3
C5 clearance greater than C4
...
Forum: Airheads 11-04-2014, 10:08 PM
Replies: 6
Views: 530
Posted By BOETJE
A run out of 0.01 to 0.02 mm on a crank is...

A run out of 0.01 to 0.02 mm on a crank is totally acceptable
The funny thing in your case is that you say you have 5 high spots...that is unusual, but again very little.
I would advise to...
Forum: The Garage 11-03-2014, 06:36 PM
Replies: 5
Views: 718
Posted By BOETJE
Correct Ultimately every coil spring is a...

Correct
Ultimately every coil spring is a torsion bar.
Forum: The Garage 11-01-2014, 06:13 PM
Replies: 5
Views: 718
Posted By BOETJE
c = (G x d4) /( 8 x D3 x n) ...

c = (G x d4) /( 8 x D3 x n)



c = spring rate in N/mm
G = Shear modulus in N/mm2
d = wire diameter in mm
D = mean Spring diameter in mm
n = number of...
Forum: Airheads 10-30-2014, 12:38 PM
Replies: 64
Views: 4,968
Posted By BOETJE
The real fast guys , never boast about it. They...

The real fast guys , never boast about it.
They are often very quiet I noticed.....
Forum: New Zealand 10-27-2014, 10:56 PM
Replies: 26
Views: 1,334
Posted By BOETJE
I'm so poor , I find everything expensive these...

I'm so poor , I find everything expensive these days....
Forum: New Zealand 10-27-2014, 09:02 PM
Replies: 26
Views: 1,334
Posted By BOETJE
$200,000 on the move Please explain ??

$200,000 on the move

Please explain ??
Forum: Airheads 10-21-2014, 11:05 AM
Replies: 46
Views: 2,017
Posted By BOETJE
Is the float level for the Ø 32 mm different from...

Is the float level for the Ø 32 mm different from the Ø 40 mm Bings ?
Forum: Airheads 09-26-2014, 11:56 PM
Replies: 2,315
Poll: Slash 2
Views: 243,671
Posted By BOETJE
Thoughts? Doesn't the number ( -5) have...

Thoughts?
Doesn't the number ( -5) have something to do with the matching number
on the timing gears ?. It is a correction for the variation of centre bore distance
which has to be compensated for...
Forum: Airheads 08-19-2014, 03:49 PM
Replies: 691
Views: 123,233
Posted By BOETJE
Niet om moelijk te doen maar.... "Braking" ...

Niet om moelijk te doen maar....

"Braking" is remmen
"Breaking " is stuk gaan.....
Forum: Airheads 08-18-2014, 01:19 PM
Replies: 133
Views: 11,940
Posted By BOETJE
Thanks for the tips WS, I'll pull it apart this...

Thanks for the tips WS, I'll pull it apart this week and have a go.
Forum: Airheads 07-24-2014, 09:21 PM
Replies: 546
Views: 93,109
Posted By BOETJE
:ken Just for that I won't show you the...

:ken

Just for that I won't show you the results of the flow tests I did on the cylinder heads ....

It's supposed to be a 1982 Tink, The frame and engine numbers match.
Poor thing has been...
Forum: Airheads 07-24-2014, 03:58 PM
Replies: 546
Views: 93,109
Posted By BOETJE
Thanks , that helps a lot...

Thanks , that helps a lot .http://i349.photobucket.com/albums/q379/BOETJE1/BMW%20R100CS/IMG_3236_zps4904e02b.jpg

My money pit.......
Forum: New Zealand 07-13-2014, 07:26 PM
Replies: 6
Views: 783
Posted By BOETJE
I've had good experience with these guys : ...

I've had good experience with these guys :

http://www.precisionlasercutting.co.nz/

Since you already have a 3 D model by the look of it , you just have to make the drawing , and send it to them...
Forum: Airheads 07-10-2014, 03:40 PM
Replies: 546
Views: 93,109
Posted By BOETJE
Nice job/bike ! I am working on my R100CS at...

Nice job/bike !
I am working on my R100CS at the moment. I suspect that the speedo is not the original ( w=1.144 , final drive ratio is 32/11)
Would you be able to tell me what RPM you are doing at...
Forum: Airheads 05-11-2014, 11:37 PM
Replies: 16
Views: 1,313
Posted By BOETJE
You gonna win big time this year : you got MAX on...

You gonna win big time this year : you got MAX on your team !
My CS came with one of those braces. I took it of because I figured there was too many ways it could distort the set up. I could swear...
Forum: Airheads 05-07-2014, 12:17 PM
Replies: 166
Views: 18,150
Posted By BOETJE
Nice work dude ! Excellent workmanship by the...

Nice work dude ! Excellent workmanship by the look of it.
That mod is done on old British singles these days as well I believe, with good results.
Fuel consumption results should be interesting.
...
Forum: Airheads 04-23-2014, 07:10 PM
Replies: 9
Views: 738
Posted By BOETJE
. ........????

.
........????
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