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Search: Posts Made By: 190e
Forum: Airheads Today, 06:49 AM
Replies: 25
Views: 841
Posted By 190e
I've got to admit I've never disconnected the...

I've got to admit I've never disconnected the battery when removing the front cover. I figure mototcycling requires concentration so I just concentrate on what I'm doing when I pull the front cover....
Forum: Airheads Today, 06:34 AM
Replies: 20
Views: 674
Posted By 190e
You can balance a wheel on it's own bearings by...

You can balance a wheel on it's own bearings by removing the seals cleaning the bearings and lubricating them with very thin oil. You have to be very careful with bearing pre-load - just enough to...
Forum: Airheads Yesterday, 05:19 AM
Replies: 23
Views: 860
Posted By 190e
Static timing could be done using the old 2...

Static timing could be done using the old 2 stroke method of a dial indicator to measure piston position. I know the piston position figures for the short stroke type 248's but not the 247's. Not...
Forum: Airheads 11-25-2014, 11:40 AM
Replies: 215
Views: 6,213
Posted By 190e
Not having gaitors I'm way behind on this thread...

Not having gaitors I'm way behind on this thread but I don't recall a response to this and it interests me.


Is it to make the tires flex a little more and put some heat in them ?

I ride down...
Forum: Airheads 11-25-2014, 05:29 AM
Replies: 32
Views: 1,132
Posted By 190e
The SI 2416 issued in 1990 was directed at all...

The SI 2416 issued in 1990 was directed at all flat twins so it applied to smaller engines and they also put deeper sumps on smaller engines.

The deeper sump did help. I once worked out that when...
Forum: Airheads 11-24-2014, 12:17 PM
Replies: 32
Views: 1,132
Posted By 190e
No it goes out through the engine breather...

No it goes out through the engine breather instead particularly at high revs. BMW knew this and issued the bulletin to run the oil at a lower level on the dipstick so that it would provide more...
Forum: Airheads 11-24-2014, 07:00 AM
Replies: 23
Views: 860
Posted By 190e
There is a good reason for this order of things...

There is a good reason for this order of things and it's not just in case one or more valves might have no clearance.

When you adjust valve clearances you are also making very small changes to...
Forum: Airheads 11-24-2014, 05:50 AM
Replies: 32
Views: 1,132
Posted By 190e
A litre every 1000 miles is slightly worse than ...

A litre every 1000 miles is slightly worse than 1 qt every 1000 miles. The old adage used to a maximum of 1 pint every 1000 miles.

Yes there was a bulletin which advised "not to add oil until the...
Forum: Airheads 11-23-2014, 03:23 PM
Replies: 32
Views: 1,132
Posted By 190e
What did the dipstick read when you filled the...

What did the dipstick read when you filled the engine with oil. You can calculate consumption on the basis that between the max mark and the Min mark is 0.85 Litres.

On what is normal oil...
Forum: Airheads 11-22-2014, 03:53 AM
Replies: 49
Views: 3,080
Posted By 190e
I have a filter set up on my e-mail account so...

I have a filter set up on my e-mail account so that all of the list e-mails go into one folder and don't clutter up my main inbox. I can then scan through them deleting without even opening the ones...
Forum: Airheads 11-21-2014, 10:51 AM
Replies: 3
Views: 325
Posted By 190e
Yes I had wondered about that. It's similar to...

Yes I had wondered about that. It's similar to the idea that a rough cast finish might be better than a polished one because it causes a little turbulence.

Those rings have been in for over a week...
Forum: Airheads 11-21-2014, 02:35 AM
Replies: 3
Views: 325
Posted By 190e
Fuel puddling

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Forum: Airheads 11-20-2014, 04:13 PM
Replies: 5
Views: 302
Posted By 190e
Didn't at one point BMW change the size of the...

Didn't at one point BMW change the size of the cylinder base O rings from 2.0mm to 2.2mm in section.
Forum: Airheads 11-19-2014, 03:11 PM
Replies: 9
Views: 390
Posted By 190e
That got to be the reason ! Can't say I've...

That got to be the reason !

Can't say I've ever had a problem with my flat tops though, at least nothing to do with them having a flat top.

Bing supplies a lot of carbs for Rotax engines on...
Forum: Airheads 11-18-2014, 03:10 AM
Replies: 9
Views: 390
Posted By 190e
The difference between flat top Bings and dome...

The difference between flat top Bings and dome top Bings is not only about the spring as some dome tops don't have springs and some other makes of CV carb with a flat top design do have them. Springs...
Forum: Airheads 11-16-2014, 03:19 PM
Replies: 7
Views: 524
Posted By 190e
If the right side is running hotter that usually...

If the right side is running hotter that usually means weaker but might also mean working harder if the carbs aren't in balance.
Forum: Airheads 11-16-2014, 10:03 AM
Replies: 24
Views: 1,723
Posted By 190e
If you do find the Standard R65 item for sale and...

If you do find the Standard R65 item for sale and yes it does have two parts, it's quite common for the top section to split where it fits around the tacho so you might want to look out for that.
Forum: Airheads 11-16-2014, 03:34 AM
Replies: 5
Views: 291
Posted By 190e
If mixture and ignition are correct it should...

If mixture and ignition are correct it should fire near instantly at 32 F. Thinner oil will help raise the cranking voltage and cranking speed but all the connections also need to be good too. I...
Forum: Airheads 11-15-2014, 05:12 AM
Replies: 40
Views: 3,463
Posted By 190e
Wasted spark is even used on some V twins even...

Wasted spark is even used on some V twins even though the wasted spark does not occur in the same part of the cycle as it would on a flat twin. With a V twin there must be a risk of the spark...
Forum: Airheads 11-14-2014, 03:09 AM
Replies: 30
Views: 1,194
Posted By 190e
The idle jet O rings are always the first to go...

The idle jet O rings are always the first to go on mine too. The bore seems to reduce in diameter as the jet is tightened up. The O rings are probably a touch too big and to be honest I'm not...
Forum: Airheads 11-13-2014, 04:01 PM
Replies: 8
Views: 520
Posted By 190e
The main thing to get your head around with oil...

The main thing to get your head around with oil is that it's not the designated viscosity of the oil that counts but the viscosity at the temperature your engine oil is actually running at. So if...
Forum: Airheads 11-12-2014, 05:59 AM
Replies: 8
Views: 520
Posted By 190e
The chart in your original manual will be out of...

The chart in your original manual will be out of date.

BMW issued service bulletins to update oil viscosity charts and the latest one I have shows 15W40 for use up to 30 Deg C which is 86 F. The...
Forum: Airheads 11-11-2014, 04:01 PM
Replies: 49
Views: 3,080
Posted By 190e
The lists search engine will reveal that the...

The lists search engine will reveal that the characters have changed over the years and they have certainly had their mavericks and controversies.

If you want some entertainment search for posts...
Forum: Airheads 11-11-2014, 06:51 AM
Replies: 22
Views: 581
Posted By 190e
The simplest ignition and charging wiring system...

The simplest ignition and charging wiring system would be a combination of these two diagrams. Both are generic of their type so the model designations can be ignored

...
Forum: Airheads 11-10-2014, 01:07 PM
Replies: 24
Views: 1,723
Posted By 190e
Nice bike, looks very tidy and it's a relatively...

Nice bike, looks very tidy and it's a relatively rare model so should be a good investment. I agree with you about the prices of contemporary British bikes and they would typically cause you a lot ...
Forum: Airheads 11-10-2014, 06:10 AM
Replies: 39
Views: 1,417
Posted By 190e
Motobins do both genuine and pattern diaphragms...

Motobins do both genuine and pattern diaphragms and there is a huge price difference. Genuine are 22.00 each and pattern are 8.40.

The pattern ones are claimed to be genuine Rover and approved...
Forum: Airheads 11-09-2014, 01:31 PM
Replies: 49
Views: 3,080
Posted By 190e
The list does take some getting used to. The...

The list does take some getting used to. The thing I like the least is the top post vs bottom post nonsense which can get very messy.

On a forum quoting a previous post to provide context is...
Forum: Airheads 11-09-2014, 10:22 AM
Replies: 3
Views: 310
Posted By 190e
I found the ignition map interesting. One basic...

I found the ignition map interesting. One basic trend seems to be a need for more advance under light loads a function which can be provided by vacuum advance.

Why was this so rarely fitted to...
Forum: Airheads 11-08-2014, 07:28 AM
Replies: 93
Views: 5,732
Posted By 190e
On the SKF chart I notice the bearing clearance...

On the SKF chart I notice the bearing clearance ranges have a considerable overlap so a normal bearing with clearance smack in the middle of the range or higher actually falls within the C3 range.
...
Forum: Airheads 11-06-2014, 04:36 AM
Replies: 10
Views: 383
Posted By 190e
I'd try the mixture screws first. One notch...

I'd try the mixture screws first.

One notch on the needle is a huge change of over 30% increase in flow area at initial lift falling to 5% at full lift so if the mixture screw doesn't do it next...
Forum: Airheads 11-05-2014, 03:32 PM
Replies: 5
Views: 296
Posted By 190e
We tend to associate the various dot standards...

We tend to associate the various dot standards with the chemical make up of different brake fluids but they are just specifications of performance such as wet and dry boiling point and viscosity. ...
Forum: Airheads 11-05-2014, 03:40 AM
Replies: 26
Views: 880
Posted By 190e
R45/R65's are 35mm which is probably a compromise...

R45/R65's are 35mm which is probably a compromise for one or the other but at least they made the effort to reduce the size from 38mm to keep the velocity up on the smaller engine. If larger...
Forum: Airheads 11-04-2014, 10:40 AM
Replies: 26
Views: 880
Posted By 190e
There are some exhaust design differences in...

There are some exhaust design differences in respect of displacement. 3 different exhaust pipe diameters on airheads 35mm, 38mm and 40mm but even that is a compromise.
Forum: Airheads 11-03-2014, 12:21 PM
Replies: 19
Views: 712
Posted By 190e
5 ohm coils would work with electronic ignition...

5 ohm coils would work with electronic ignition but you would get less spark energy than with 3 ohm coils and that might be significantly less spark energy as it's proportional to the square of the...
Forum: Airheads 10-29-2014, 12:45 PM
Replies: 33
Views: 2,501
Posted By 190e
If a bike burns oil due to general wear there is...

If a bike burns oil due to general wear there is no reason for it to stop at some particular oil level.

The way I read that bulletin is that the combination of high oil level and high revs is too...
Forum: Airheads 10-27-2014, 07:16 AM
Replies: 91
Views: 4,716
Posted By 190e
I have always run the pressures listed by the...

I have always run the pressures listed by the tire manufacturer not the under seat pressures. So with new tires I would do what you have done and check their web site but I've never seen them as low...
Forum: Airheads 10-26-2014, 12:08 PM
Replies: 19
Views: 726
Posted By 190e
The danger of having the butterfly open too much...

The danger of having the butterfly open too much is that it may start to bring the by pass or transition ports into play which could lose control of the idle speed as they are not restricted by the...
Forum: Airheads 10-26-2014, 05:47 AM
Replies: 19
Views: 726
Posted By 190e
If that includes me would you care to explain why...

If that includes me would you care to explain why every Bing CV slide has the diaphragm vacuum hole towards the cylinder head/throttle valve side of the carb. The OP did ask about slide orientation.
Forum: Airheads 10-26-2014, 04:38 AM
Replies: 19
Views: 726
Posted By 190e
As has been said the locating tabs on the...

As has been said the locating tabs on the diaphragm determine the orientation of the slide... provided the diaphragm has been correctly fitted. The hole at the bottom of the slide communicates the...
Forum: Airheads 10-24-2014, 01:37 PM
Replies: 8
Views: 741
Posted By 190e
Here in England we feel for the trauma you are...

Here in England we feel for the trauma you are going through in Canada.

Some years ago I actually visited that building as a tourist and was greatly impressed. That adds a realness to the images...
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