Search found 717 matches

by Roy Gavin
Thu Sep 23, 2021 12:07 am
Forum: Airhead Q&A's
Topic: Oil leak behind alternator
Replies: 9
Views: 396

Re: Oil leak behind alternator

In my experience the current seals and O rings are inferior to the original factory fit parts, and they seem to have been changed for reasons of cost rather than any improved technology. BMW have been using ethanol resistant " rubber " since at least the 80's , so if the OEM bits are failing it is p...
by Roy Gavin
Tue Sep 14, 2021 3:04 am
Forum: Airhead Q&A's
Topic: 1991 R80RT Project
Replies: 26
Views: 672

Re: 1991 R80RT Project

Make certain you blow through the two smaller passages below the intake.
One should exit freely round the needle jet, the other through sometimes one usually two pinpricks just behind the throttle butterfly, and also out through the pilot jet.
by Roy Gavin
Tue Sep 07, 2021 1:06 am
Forum: Airhead Q&A's
Topic: R100rt 1981 117k miles original but oil leak
Replies: 25
Views: 686

Re: R100rt 1981 117k miles original but oil leak

I was talking about seals which are being sold today for use in BMWs. There are a few different material which a seal can be made from, some more expensive and some may be hard to source in lesser used size like the shaft seal. As the seals are a press fit there is the possibility of slightly differ...
by Roy Gavin
Mon Sep 06, 2021 2:17 am
Forum: Airhead Q&A's
Topic: E10
Replies: 16
Views: 572

Re: E10

When I replaced the hard old hose under the airbox on my GS it was the orig BMW hose, with the size, 6x12 and the date 93- 6 . Just as a test I pit it in a bottle of E99, sometimes called meths,or in North Britain, Irish Whisky. 14 years latter it is still as hard as the day it went in, with no dete...
by Roy Gavin
Thu Sep 02, 2021 12:48 pm
Forum: Airhead Q&A's
Topic: Aftermarket exhausts Db for an R75/6
Replies: 13
Views: 329

Re: Aftermarket exhausts Db for an R75/6

I have a unequal 2 in1 and around 2 to 1 on my 1000 cc R75/7. Tried one Staintune, probably similar sound to stock but simply did not work with the two in one. Then I tried a replica Dunstall Decibel silencer, as good ones were around for much less than replica airhead items. Around $$A 90- from mem...
by Roy Gavin
Thu Sep 02, 2021 12:26 pm
Forum: Airhead Q&A's
Topic: R100rt 1981 117k miles original but oil leak
Replies: 25
Views: 686

Re: R100rt 1981 117k miles original but oil leak

Wouldn't touch the rear seal either, I think the OEM ones were better than anything which is sold for the job now. And a slightly different size. Snowbum's site sets out the problems and suggests a procedure for getting the current ones in. My recent experience is if anything worse, I had two pick u...
by Roy Gavin
Sat Aug 28, 2021 3:08 pm
Forum: Airhead Q&A's
Topic: Carb balancer
Replies: 21
Views: 2717

Re: Carb balancer

The factory mechanics kit for the early bikes with no vacuum take offs was a pair of flow gauges, as Rob has said they show differences in performance side to side not just balance. So you can look at fixing the poor side, rather than detuning the good side to match the bad one. First bought my Guns...
by Roy Gavin
Tue Aug 24, 2021 2:22 pm
Forum: Airhead Q&A's
Topic: Shouldn’t have oiled the taps?1989 BMW R80RT
Replies: 24
Views: 1100

Re: Shouldn’t have oiled the taps?1989 BMW R80RT

Head bearings are best with EP2 extreme pressure grease , most auto wheel bearing greases suit as the the fronts are usually taper rollers too.
With lesser grease there is the chance of false brinneling, the brown stuff that looks like rust and is also found in worn out chains.
by Roy Gavin
Mon Aug 23, 2021 3:27 am
Forum: Airhead Q&A's
Topic: Shouldn’t have oiled the taps?1989 BMW R80RT
Replies: 24
Views: 1100

Re: Shouldn’t have oiled the taps?1989 BMW R80RT

Useless bit of information but a large blade fuse fits neatly into the common size of female blade connector. So no need for a new fuse board, just pull the connections off the existing board and stick a fuse in. After checking the connectors, sometimes it is the connections on the back which are ca...
by Roy Gavin
Sat Aug 21, 2021 4:37 am
Forum: Airhead Q&A's
Topic: high revs
Replies: 34
Views: 1027

Re: high revs

barryh, there is no need to remove or strip either bean can to clean/lube the bob weights, there is a small oval "tin lid" on the side of the can which gives you access. BMW could hardly recommend that you do it with the motor running if that was not the case! Subject to the restrict in my previous ...
by Roy Gavin
Fri Aug 20, 2021 7:14 am
Forum: Airhead Q&A's
Topic: high revs
Replies: 34
Views: 1027

Re: high revs

Just to be clear when they say cover they are referring to the small "tin lid" on the side of the bean , not to spraying in from the end! And they refer to electronic ignition cans ONLY, although the points bean cans have the same bob weights. Might be because the propellant in some spray cans is hi...
by Roy Gavin
Sat Aug 14, 2021 12:44 pm
Forum: Airhead Q&A's
Topic: Oil Level
Replies: 18
Views: 672

Re: Oil Level

Anton's site, the one referred to a couple of threads down on oil changes, also has a bit information on sumps and dipsticks.
by Roy Gavin
Fri Jul 02, 2021 1:31 am
Forum: Airhead Q&A's
Topic: I sold my R75 :bawling:
Replies: 65
Views: 2376

Re: I sold my R75 :bawling:

If you have another plug of the correct grade you can compare the electrode and insulation to see if they are the same.
The further the electrode protrudes the hotter it will get, which con be a problem.
NGK's can span two gauges so you would probably want to be shorter than them to be safe.
by Roy Gavin
Sat Jun 26, 2021 1:56 pm
Forum: Airhead Q&A's
Topic: Valve Adjustment ?
Replies: 7
Views: 402

Re: Valve Adjustment ?

Yep, mine have gone almost 200,000 km but it is keeping the revs down that counts, as well as going slow.
And your choice of oil!
by Roy Gavin
Thu Jun 24, 2021 2:40 pm
Forum: Airhead Q&A's
Topic: Who painted my R100RS?
Replies: 7
Views: 480

Re: Who painted my R100RS?

If you are considering spray can paint I have been able to get a excellent match with Duplicolor on a R75/7, R80 G/S and F650 Funduro, Cyan Blue, Alpine white and Milano Red , from memory, but I usually tried a few! But of course the match Is usually only to the unexposed parts like the underside of...
by Roy Gavin
Fri Jun 18, 2021 1:43 am
Forum: Airhead Q&A's
Topic: R60/6 Throttle and clutch
Replies: 40
Views: 1686

Re: R60/6 Throttle and clutch

At one time someone sold a bit of kit with the pulley packaged into a little case. Had a name like Ezypull or something which for some was a turn off. Seems like there are still a few similar items around, but they all seem to use a lever rather than a pulley, which might be easier on the cable. Sti...
by Roy Gavin
Thu Jun 17, 2021 2:24 am
Forum: Airhead Q&A's
Topic: R60/6 Throttle and clutch
Replies: 40
Views: 1686

Re: R60/6 Throttle and clutch

Last time I read of anyone having problems with sulfur in oil was BSA with the final drive on the Sunbeam S7, 1947. So they changed the material, but by the time they did so the oil formulation had changed and it no longer gave any problems. So , in the UK at least , if the manufacturing date of the...
by Roy Gavin
Thu Jun 17, 2021 2:14 am
Forum: Airhead Q&A's
Topic: I sold my R75 :bawling:
Replies: 65
Views: 2376

Re: I sold my R75 :bawling:

Had something similar, it was the crimped in back of the ignition switch which had slackened off. Just cut the ignition momentarily, but when the power came back on there was a spark and sometime the loudest backfire imaginable. No denying some of the early Boyers which were around 50 years ago were...
by Roy Gavin
Wed Jun 16, 2021 4:10 am
Forum: Airhead Q&A's
Topic: I sold my R75 :bawling:
Replies: 65
Views: 2376

Re: I sold my R75 :bawling:

Like Andy I have had no problems with Boyers on my BMW's. Just fit and forget, and the advantage of a better totally digital curve, compared to a perhaps worn 40 year old set of bob weights and springs and pattern points and condenser. But you have to read and follow the instructions, and anything s...
by Roy Gavin
Fri Jun 04, 2021 3:05 am
Forum: Airhead Q&A's
Topic: wiring meltdown.
Replies: 27
Views: 1318

Re: wiring meltdown.

Yep, I did the same on my G/S PD , only regret was that I did not do it sooner. But not cheap , as on the G/S there are a fair few sub harnesses to replace too. And switches, and relays. and-----! Bought the main and some subs from EME , but it seems no one has stock of everything you will need. And...
by Roy Gavin
Thu May 20, 2021 4:44 am
Forum: Airhead Q&A's
Topic: idle jets re starting.
Replies: 9
Views: 596

Re: idle jets re starting.

Four turns out is wrong, something is wrong and needs to be fixed. No easy answer, but a complete strip down and clearance of every passageway including the complete idle and slow running circuit would be a start. Or you can leave the carbs in place, remove the float bowls and intake tubes and blow ...
by Roy Gavin
Tue Apr 27, 2021 1:47 am
Forum: Airhead Q&A's
Topic: Gearbox / rear diff oil R100R
Replies: 29
Views: 1985

Re: Gearbox / rear diff oil R100R

Yes, I bought a case very cheaply, $6/L when a local dealer remaindered it when he was doing renovations.
Same with the Limslip, not a great market for it nowadays and at $1-/L I grabbed a bunch of that too!
by Roy Gavin
Mon Apr 26, 2021 2:58 pm
Forum: Airhead Q&A's
Topic: Gearbox / rear diff oil R100R
Replies: 29
Views: 1985

Re: Gearbox / rear diff oil R100R

I used M1 Synth gear oil in my G/S for 230,000 km, when it started to leak it was through the neutral switch. Same M1 the final drive, the wheel had more than the specified play for 240,000 km but it didn't start leaking until the bearing was shot. On my lightly used R75/7 which is on club plates I ...
by Roy Gavin
Tue Apr 20, 2021 3:34 pm
Forum: Airhead Q&A's
Topic: Quick oil filter question.
Replies: 8
Views: 610

Re: Quick oil filter question.

http://www.largiader.com/tech/filters/

Click through to the canister page too.
by Roy Gavin
Sun Apr 18, 2021 4:26 am
Forum: Airhead Q&A's
Topic: Is a horn relay necessary
Replies: 5
Views: 480

Re: Is a horn relay necessary

Horns might be a bit louder with one too, and last uber expensive replacement handlebar switch I bought in BMW packaging was a cheap no name item, so your OEM switches are worth protecting!

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