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Search: Posts Made By: 190e
Forum: Airheads Yesterday, 05:31 AM
Replies: 25
Views: 857
Posted By 190e
Only thing I'd add is before you do any carb...

Only thing I'd add is before you do any carb adjustments make sure the fuel levels in both float bowls are the same.
Forum: Airheads Yesterday, 05:24 AM
Replies: 18
Views: 776
Posted By 190e
The most important thing about valve clearances...

The most important thing about valve clearances is not the exact setting but that you do both cylinders so that the gaps are as close to the same as possible. Reason being that when adjusting valves...
Forum: Airheads Yesterday, 04:45 AM
Replies: 5
Views: 270
Posted By 190e
The throw out bearing on a 79 R65 will originally...

The throw out bearing on a 79 R65 will originally have been the radial needle roller type which was later replaced by a better ball type thrust race. With the radial roller type the rollers...
Forum: Airheads 07-22-2014, 04:15 AM
Replies: 8
Views: 364
Posted By 190e
If you wish I can calculate the spring rates for...

If you wish I can calculate the spring rates for you if you measure the spring diameter and count the number of full turn coils. List close and wide spaced coils separately if they are dual rate...
Forum: Airheads 07-20-2014, 12:53 AM
Replies: 26
Views: 1,440
Posted By 190e
I prefer 78% Nitrogen - it's so much cheaper.

I prefer 78% Nitrogen - it's so much cheaper.
Forum: Airheads 07-19-2014, 02:21 PM
Replies: 26
Views: 1,440
Posted By 190e
I didn't realise they used thyristors -...

I didn't realise they used thyristors - presumably to short circuit the stator windings. While I can see that limits the heat dissipated in the thyristors to the forward voltage drop. What impact...
Forum: Airheads 07-19-2014, 01:07 PM
Replies: 6
Views: 323
Posted By 190e
I'm not sure air in the system fully explains why...

I'm not sure air in the system fully explains why it was initially firm. Perhaps he has already done the lever tie back routine and air has somehow come back out of solution. Either way it does have...
Forum: Airheads 07-19-2014, 12:50 PM
Replies: 26
Views: 1,440
Posted By 190e
That modern bikes go with inefficient PM...

That modern bikes go with inefficient PM alternators confirms the manufactures don't give a stuff about efficiency and fuel economy. Using Plaka's conversion factor (derived from 1Hp = 746 Watts) and...
Forum: Airheads 07-19-2014, 09:11 AM
Replies: 18
Views: 590
Posted By 190e
Just to be clear when calculating ratios. ...

Just to be clear when calculating ratios.

78 - 80 R65's had ATE's with 13mm master and 36mm caliper.
81 - 84 R65's had Brembo's with 12mm master and 36mm caliper.
Forum: Airheads 07-19-2014, 08:42 AM
Replies: 4
Views: 189
Posted By 190e
The screws are M3.5 x 0.6

The screws are M3.5 x 0.6
Forum: Airheads 07-19-2014, 04:34 AM
Replies: 20
Views: 1,076
Posted By 190e
Nice kit. Wallace and Tiernan brings back...

Nice kit.

Wallace and Tiernan brings back some memories. That gauge is a thing of beauty and must have cost a small fortune. I'm guessing it's an absolute gauge.
Forum: Airheads 07-19-2014, 04:02 AM
Replies: 50
Views: 2,116
Posted By 190e
Just for completeness there is another style of...

Just for completeness there is another style of flat top bing top cover which isn't even uniformly flat across the top surface. There is a slightly depressed area with a raised ridge around the edge....
Forum: Airheads 07-18-2014, 12:43 PM
Replies: 20
Views: 1,076
Posted By 190e
Time is an excellent example of the problem -...

Time is an excellent example of the problem - it's all relative.
Forum: Airheads 07-18-2014, 12:41 PM
Replies: 5
Views: 352
Posted By 190e
To be fair to the guy it was.

To be fair to the guy it was.
Forum: Airheads 07-18-2014, 12:21 PM
Replies: 20
Views: 1,076
Posted By 190e
This particualar digital gauge may well be...

This particualar digital gauge may well be accurate but it's wrong to assume all digital devices are accurate to the least significant digit they are able to display. There are issues of range and...
Forum: Airheads 07-18-2014, 12:02 PM
Replies: 18
Views: 590
Posted By 190e
ATE's as used on early R65's are conventional...

ATE's as used on early R65's are conventional dual piston calipers very similar and dimensionally the same including 36mm piston size as the Brembo's used after 81. They are all but identical but...
Forum: Airheads 07-18-2014, 10:13 AM
Replies: 50
Views: 2,116
Posted By 190e
My 79 model year (build date Nov. 78) flatops...

My 79 model year (build date Nov. 78) flatops have the Bing lettering cast in.
Forum: Airheads 07-18-2014, 03:33 AM
Replies: 18
Views: 590
Posted By 190e
For a benchmark a stock early R65 with 13mm...

For a benchmark a stock early R65 with 13mm master cylinder has a ratio of 15.3 which I can tell you is poor. 81 -84 models had a 12mm which gave 18 - better.

Twin disc versions had a 16mm master...
Forum: Airheads 07-18-2014, 02:12 AM
Replies: 27
Views: 1,055
Posted By 190e
I've seen something about the benefit of a...

I've seen something about the benefit of a slightly wider 2nd ring gap. Something about relieving the pressure built up between the 1st and 2nd ring which then allows the first ring to seal better.
Forum: Airheads 07-18-2014, 02:05 AM
Replies: 5
Views: 352
Posted By 190e
I'm not certain about an 82 but the earlier R65's...

I'm not certain about an 82 but the earlier R65's used separate bulbs for brake and tail with the only common thing being the earth connection so that's what I would check first. They are even fed by...
Forum: Airheads 07-16-2014, 10:51 AM
Replies: 15
Views: 740
Posted By 190e
OK I'll bite but I can't believe it's not...

OK I'll bite but I can't believe it's not obvious.

If old floats get heavy as some assuredly do it will raise the fuel level and enrichen the mixture across the whole range but more so at idle and...
Forum: Airheads 07-15-2014, 03:00 PM
Replies: 50
Views: 2,362
Posted By 190e
I take it from the battery manufacturers data...

I take it from the battery manufacturers data sheets which incidentally for my make of battery give the same figures for both AGM and Gel - at 25 C 9% self discharge after 3 months. Odyssey (which...
Forum: Airheads 07-15-2014, 12:34 PM
Replies: 20
Views: 1,076
Posted By 190e
I used to repair and calibrate bourdon tube...

I used to repair and calibrate bourdon tube pressure gauges and I wouldn't trust a tiny 2" or 3" dial gauge at all unless It had been calibrated to a known standard. The pencil gauges would normally...
Forum: Airheads 07-15-2014, 12:24 PM
Replies: 50
Views: 2,362
Posted By 190e
I do a very short commute daily and do not need...

I do a very short commute daily and do not need any supplementary battery charging at all and I know that with some certainty after careful monitoring of the battery. At least that was the case once...
Forum: Airheads 07-15-2014, 11:58 AM
Replies: 34
Views: 1,169
Posted By 190e
Cleaning slingers is not a trivial undertaking....

Cleaning slingers is not a trivial undertaking. Aren't we glad the later bikes have filters.

44 odd years ago I had Fiat 500 with a twin cylinder air cooled engine ( strange device but they are...
Forum: Airheads 07-15-2014, 05:39 AM
Replies: 50
Views: 2,116
Posted By 190e
Bluhduh The slides may wear but in a CV carb that's less...

The slides may wear but in a CV carb that's less critical than a slide carb because any leakage is straight back to atmospheric pressure and not to the inlet tract on the other side of the butter...
Forum: Airheads 07-12-2014, 10:04 AM
Replies: 9
Views: 538
Posted By 190e
I agree, the idle mixture is much too lean. ...

I agree, the idle mixture is much too lean.

Idle mixture should be leanish but not so much that it lowers the idle speed. Turn out the mixture screws in very small steps until it achieves...
Forum: Airheads 07-11-2014, 12:54 PM
Replies: 7
Views: 428
Posted By 190e
The only data I've seen of that sort is max....

The only data I've seen of that sort is max. permissible wheel loads.

http://m5.i.pbase.com/o6/38/54838/1/74356145.uMz01Stb.R90SManual79.jpghttp://
http://www.pbase.com/dwerbil/image/74356145...
Forum: Airheads 07-06-2014, 07:34 AM
Replies: 174
Views: 14,521
Posted By 190e
When I check my odometer aginst my car and...

When I check my odometer aginst my car and satellite data it is quite accurate but actually under reads by 2 %. That is with a 4.00 tire which at 675mm dia is at the high end of the spectrum. A...
Forum: Airheads 07-05-2014, 02:30 PM
Replies: 50
Views: 2,362
Posted By 190e
Again being simplistic and ignoring some effects ...

Again being simplistic and ignoring some effects

6 secs
Forum: Airheads 07-05-2014, 12:39 PM
Replies: 15
Views: 684
Posted By 190e
"Open rotor" means open circuit or infinite...

"Open rotor" means open circuit or infinite resistance. The coil of wire has a break in it so no current will flow.

In a good rotor the coil of wire has a low resistance value of something like 3...
Forum: Airheads 07-05-2014, 12:15 PM
Replies: 50
Views: 2,362
Posted By 190e
In a word that's bollocks In a few more...

In a word that's bollocks


In a few more words....

It depends on the bike and how long it takes to start. A properly tuned bike will start virtually instantly.

lets say the starter pulls...
Forum: Airheads 07-05-2014, 11:57 AM
Replies: 81
Views: 2,165
Posted By 190e
I've used both a very accurate manometer and also...

I've used both a very accurate manometer and also shorting rods.

Seems to me a differential manometer will tell you that both cylinders are producing the same vacuum (pumping equal amounts of air)...
Forum: Airheads 07-04-2014, 01:31 PM
Replies: 50
Views: 2,362
Posted By 190e
I was a young guy in 76 and remember looking at...

I was a young guy in 76 and remember looking at the BMW's in the showroom. Besides being very expensive they looked like old man's bikes compared to the competition. I bought a Z900 instead at not...
Forum: Airheads 07-02-2014, 04:47 AM
Replies: 59
Views: 1,888
Posted By 190e
Thanks cy, In an attempt to solve the riddle...

Thanks cy,

In an attempt to solve the riddle of a Gel battery being marketed as of AGM construction I've e-mailed the manufacturer to ask which it is and if it's a Gel why the high charge voltage...
Forum: Airheads 07-01-2014, 02:01 PM
Replies: 12
Views: 540
Posted By 190e
BMW didn't say oil consumption stops at the half...

BMW didn't say oil consumption stops at the half way mark they said don't add oil until it gets to the minimum and then add no more than 1 US pint. That advice was given to minimise oil consumption....
Forum: Airheads 07-01-2014, 01:00 PM
Replies: 12
Views: 540
Posted By 190e
In a US service bulletin on oil consumption BMW...

In a US service bulletin on oil consumption BMW acknowledged that "too much oil would result in high oil consumption via the breather" and that "power is lost as a result of the the crankshaft...
Forum: Airheads 07-01-2014, 06:08 AM
Replies: 59
Views: 1,888
Posted By 190e
That's what I thought but it implies the...

That's what I thought but it implies the manufacturers data sheet is incorrect. If the battery has to be one or the other it will be safer to assume it's a Gel and opt for 14.2 volts.

On my...
Forum: Airheads 07-01-2014, 05:12 AM
Replies: 12
Views: 540
Posted By 190e
It's important not to over fill so what I do is...

It's important not to over fill so what I do is deliberately put less in than specified but enough to be safe, then go ride the bike before topping up to the desired level which for me on a standard...
Forum: Airheads 07-01-2014, 05:08 AM
Replies: 7
Views: 367
Posted By 190e
I have a Motobins cover. It fitted well over the...

I have a Motobins cover. It fitted well over the original foam, looks good and is comfortable but there is no use pretending it's the same quality as an original cover. The vinyl material is much...
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