Search found 669 matches

by Roy Gavin
Thu Dec 03, 2020 12:07 am
Forum: Airhead Q&A's
Topic: Non standard air filter.
Replies: 4
Views: 107

Re: Non standard air filter.

Plumbers merchants have "rubber" adapters and there will be one close enough to work- they are needed on some bikes when fitting Mikuni slide type carbs. Slide type carbs are noticeably harder to set up than CV 's and takes a bit patience, and cash, I have over 20 recommendations for Mikuni slide ty...
by Roy Gavin
Fri Nov 20, 2020 9:49 am
Forum: Airhead Q&A's
Topic: Rear main seals
Replies: 11
Views: 326

Re: Rear main seals

Snowbum usually has a handle on things so I would go along with whatever he suggests.
I would stick with a genuine seal, you will need bolts, etc, anyway.
I ended up needing the drive shaft bearing and boot replaced.
And, ahem, the gearbox neutral switch!
by Roy Gavin
Tue Nov 17, 2020 11:09 pm
Forum: Airhead Q&A's
Topic: Topdon findings and low charging
Replies: 11
Views: 330

Re: Topdon findings and low charging

I have found best to check fully charged.
And type matters too, some manufacturers fudge a little or perhaps have a hybrid which doesn't quite match Topdon's categories, so maybe try another type and see the results
by Roy Gavin
Sun Nov 08, 2020 5:55 am
Forum: Airhead Q&A's
Topic: Oil cooler thermostat questions
Replies: 33
Views: 733

Re: Oil cooler thermostat questions

http://largiader.com/tech/oilpan/ A little light reading. A visit to Motoren Israel is always interesting, they seem to like both a larger/ deeper sump and a windage tray to keep the oil away from the crank, but no mention of what level you fill the sump to. Things change too, modern MA oils designe...
by Roy Gavin
Fri Nov 06, 2020 11:52 pm
Forum: Airhead Q&A's
Topic: Oil cooler thermostat questions
Replies: 33
Views: 733

Re: Oil cooler thermostat questions

Just one point, and that is that the oil temp does not change a lot due to changes in ambient temperature, a 40C day makes little difference to oil temp or pressure, as the oil is always higher than 40C anyway. Lack of movement does cause overheating, a airhead motor will overhead PDQ if left standi...
by Roy Gavin
Thu Nov 05, 2020 9:44 pm
Forum: Airhead Q&A's
Topic: Oil cooler thermostat questions
Replies: 33
Views: 733

Re: Oil cooler thermostat questions

Some bikes with the cooler have considerably smaller sumps, so it would seem that it would be advisable to change that too if you remove the cooler. I have both oil pressure and temp gauge on my bikes and would never consider any mod which would increase the oil temp, it seems that most who advocate...
by Roy Gavin
Wed Nov 04, 2020 3:16 am
Forum: Airhead Q&A's
Topic: Throttle parts help.
Replies: 5
Views: 224

Re: Throttle parts help.

I once bought lower throttle cables which were too short for 40 mm carbs.
No reason for it as there is plenty of adjustment which would normally take up any difference between 32 and 40 mm carbs, but some folks make them different!
by Roy Gavin
Wed Nov 04, 2020 3:09 am
Forum: Airhead Q&A's
Topic: R100 gear selection problem on the down-shift
Replies: 32
Views: 846

Re: R100 gear selection problem on the down-shift

Good article but a couple of points - firstly, some folks like to use parallels across the full width of the cover when measuring the depth of the pockets in the cover - it can make a difference to the reading. Second BMW revised the amount of end float from the figure found in Haynes and the worksh...
by Roy Gavin
Thu Oct 29, 2020 2:22 am
Forum: Airhead Q&A's
Topic: R100 gear selection problem on the down-shift
Replies: 32
Views: 846

Re: R100 gear selection problem on the down-shift

I would take Mols advice and change the oil first. A few years back I bought a stash of BP Limslip limited slip oil diff which my servo was remaindering. Is a high quality GL 5/6 oil, and I, and others who have tried it or other Limslip oils ,find that they noticeably improves the gear change. Won't...
by Roy Gavin
Thu Oct 29, 2020 2:09 am
Forum: Airhead Q&A's
Topic: Heavy duty clutch spring...
Replies: 13
Views: 434

Re: Heavy duty clutch spring...

Just recently changed the rear oil seal on my warm 1000cc high comp R80 G/S PD at 480,000 KM. The clutch plate was the original with the date etc still clearly visible and it was still well in spec as far as thickness so it went back in. So there might be a reason why there are no heavy springs for ...
by Roy Gavin
Wed Oct 28, 2020 12:14 am
Forum: Airhead Q&A's
Topic: 90S handlebar Fairing Material Help
Replies: 3
Views: 201

Re: 90S handlebar Fairing Material Help

My 90S faring is fiberglass, but as it is on a R75/7 it may be a replica!
by Roy Gavin
Mon Oct 26, 2020 11:18 pm
Forum: Airhead Q&A's
Topic: R100rs new owner
Replies: 20
Views: 580

Re: R100rs new owner

The sliding dogs are undercut(dovetailed?) to prevent them sliding out of engagement, so they were never designed to be moved under pressure. Whether or not they are subject to more wear during a clutch less change is really only a question of how much more, and how much it will shorten the box life...
by Roy Gavin
Fri Oct 23, 2020 4:49 am
Forum: Airhead Q&A's
Topic: Heat sink and moly paste
Replies: 13
Views: 388

Re: Heat sink and moly paste

A lube with around 60% moly is needed to to lube the splines properly, anything less and the splines tend to gall, but I think there is a Utube vid that recommends strawberry jam applied from the back of a warm teaspoon which quite a few seem to like! Dedicated wheel bearing greases are made specifi...
by Roy Gavin
Wed Oct 21, 2020 6:25 am
Forum: F Series Technical Q&A's
Topic: F650 GS gear changing
Replies: 8
Views: 458

Re: F650 GS gear changing

Shouldnt be too bad, but if you just try to roll the bike forward a little as you put it into gear it helps. With kickstart bikes we used to give them a swing with the clutch pulled in to free the plates, if it really bothers you it might be possible to do something similar by leaving it in gear and...
by Roy Gavin
Mon Oct 19, 2020 2:27 pm
Forum: Airhead Q&A's
Topic: Changing Fork Oil Viscosity
Replies: 72
Views: 1962

Re: Changing Fork Oil Viscosity

Yes, you might, but remember it is populated by Australians-----!
by Roy Gavin
Thu Oct 15, 2020 3:57 am
Forum: Airhead Q&A's
Topic: Changing Fork Oil Viscosity
Replies: 72
Views: 1962

Re: Changing Fork Oil Viscosity

Did suggest air gap with forks fully compressed, which on most forks will not restrict travel. And yes, there might be some theoretical change to things with a little more oil, but in reality most Airhead springs will be around 40 years old and not quite as bouncy as they once were, and might apprec...
by Roy Gavin
Wed Oct 14, 2020 7:06 am
Forum: Airhead Q&A's
Topic: Wedgetail electronic ignition.
Replies: 2
Views: 323

Re: Wedgetail electronic ignition.

As someone who cut his teeth on bikes with a manual advance and retard lever on the magneto I take all these Hi power ignitions with a pinch of salt. Cold start voltage is less of a concern these days too, as modern AGM batteries can hold their voltage over 12V at peak discharge, unlike obsolete wet...
by Roy Gavin
Wed Oct 14, 2020 3:51 am
Forum: Airhead Q&A's
Topic: Changing Fork Oil Viscosity
Replies: 72
Views: 1962

Re: Changing Fork Oil Viscosity

Top line Synth suspension fluids are usually true to grade, naturally multigrade, reduce friction and last around twice as long, all things I like. Particularly if you have to remove the legs to drain them! As andyb said , level can make as much difference as oil grade and as air in naturally progre...
by Roy Gavin
Sun Sep 27, 2020 9:43 am
Forum: Airhead Q&A's
Topic: YouTube
Replies: 89
Views: 8609

Re: YouTube

Too busy, spring here and our prime riding season. Wet just lifted after 6 days/6 inches of rain swirled in off the Southern Ocean. So a early start tomorrow, tire depot at 8am for a set of Anekee Adventures on the Himalayan then a 300 km trip down to Cape Jarvis to run them in. Anyway those who kno...
by Roy Gavin
Thu Sep 24, 2020 2:51 pm
Forum: Airhead Q&A's
Topic: Advice on fuel consumption
Replies: 63
Views: 2096

Re: Advice on fuel consumption

In Oz. the system should be L/100 km, and to convert to MPG you divide 282 buy the answer. Just after a full carb rebuild and a full service and tune my 1000 cc R80 G/S PD went 20 km on a liter, 5l/100 km or 56 MPG and around 620 km on a tankful. That was then, now I get around 16/17 km/l or 45/48 M...
by Roy Gavin
Wed Sep 23, 2020 2:24 am
Forum: Airhead Q&A's
Topic: Actual and Quoted Power Outputs
Replies: 6
Views: 360

Re: Actual and Quoted Power Outputs

Actually, most tire manufacturers recommend that you change the rear tire after a dyno session, but no one ever seems to. Rolling road Dynos are a tuning tool, useful as a before and after compassion, but just about every graph I have seen which details torque and HP has failed the most basic test a...
by Roy Gavin
Wed Sep 23, 2020 2:04 am
Forum: Airhead Q&A's
Topic: caliper pins
Replies: 4
Views: 264

Re: caliper pins

If they are Brembo calipers the pin and spring hold the pad pins in place.
Later Brembo's do not have them, but they have a longer pin with a hole in for a P clip which does the same job.
by Roy Gavin
Tue Sep 22, 2020 10:45 am
Forum: Airhead Q&A's
Topic: YouTube
Replies: 89
Views: 8609

Re: YouTube

Brooks Garage is a bit better, but there is actually a 3mm thick sleeve which fits over the two half's of the sprocket removal tool to keep it together while you pull the sprocket off!
by Roy Gavin
Mon Sep 21, 2020 5:29 am
Forum: Airhead Q&A's
Topic: YouTube
Replies: 89
Views: 8609

Re: YouTube

It is actually a spoof video, I was just warning those that might take it seriously.
Hard to believe , but looks like we have at least two who do!
by Roy Gavin
Sun Sep 20, 2020 3:57 am
Forum: Airhead Q&A's
Topic: YouTube
Replies: 89
Views: 8609

Re: YouTube

Mark , they are just rubbish, and it is schoolboy stuff, it shouldn't need me to tell you that.
And what enjoyment is there in watching an imbecile assemble a motor with an error at every step, unless you are looking for a laugh.
I did find them laughable, but than is not the same!

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