airhead parts - the dark secrets revealed

[CurlyMike]

Originally Posted by Rapid Dog

Has anyone here actual used or had any experience with this set-up?
Prequel - I'm workin' on a major bitch rant if things don't pan out soon...

I have had one for about 2 years now and works flawlessly. Spend the money to get the new diode board as well. Both are great and Rick is great to work with.

[Rapid Dog]

Have you priced a new OEM bean can lately Chris?
$586.73! The Alpha is only $299.95 and it's rebuildable. A very sturdy unit from the looks.
That's one reason I bought it. Hoping this module thing pans out.

[bmweuro]

Originally Posted by bmweuro

Seems like they are a little more pricey than stock, but if they last longer then I would go for it.

Originally Posted by Rapid Dog

Have you priced a new OEM bean can lately Chris?
$586.73! The Alpha is only $299.95 and it's rebuildable. A very sturdy unit from the looks.
That's one reason I bought it. Hoping this module thing pans out.

Not sure what I was looking at. Maybe to many beers that night

[Rapid Dog]

Well, got the new module in, Rick is a man of his word.
Everything seems to be as it should be. I think I fially have it semi-dialed. Runs like a snotted calf.

[Tripletreat]

My 1988 R100GS has #45 pilot jets. I'd like to go one size richer, but my local BMW dealer does not sell such a thing (?). The parts fiche doesn't even mention the jet size(s). The Bing Carb website doesn't mention Bing carburettor jets either. What's up with this? Surely a range of pilot jets is available, but where?

[rkjjeep]

here http://www.bingcarburetor.com/bmw/bmw.html

[boxerboy81]

Originally Posted by Tripletreat

My 1988 R100GS has #45 pilot jets. I'd like to go one size richer, but my local BMW dealer does not sell such a thing (?). The parts fiche doesn't even mention the jet size(s). The Bing Carb website doesn't mention Bing carburettor jets either. What's up with this? Surely a range of pilot jets is available, but where?

A 50 idle jet should be available as they were used on the 75/6 and R80.

Why one bigger?

Part No.60464 for a #50 @ Motobins.

Idle jet, aka mixture screw. Is that what you mean by pilot jet?

[Lomax]

I have an 84 R100RS and picked up a Browns side stand for it.

It has had the Supertrapp exhaust system on it since new and if possible I would like to leave it on there.

BUT the Supertrapp exhaust is a lot bigger in diameter that the stock exhaust and the Browns side stand will not fit over the top of it and have enough room to bolt to the engine mount.

I am looking for any advice anyone has on what to do here.

I guess it may come down to putting the stock exhaust back on if I want to user the Browns side stand, or keep using the stock side stand if I want to keep the Supertrapp, But I am fishing for any other options.

Here is what the exhaust looks like on the bike.



Thanks.

Marc

[DoktorT]

Originally Posted by Tripletreat

My 1988 R100GS has #45 pilot jets. I'd like to go one size richer, but my local BMW dealer does not sell such a thing (?). The parts fiche doesn't even mention the jet size(s). The Bing Carb website doesn't mention Bing carburettor jets either. What's up with this? Surely a range of pilot jets is available, but where?

Do get the Bing Manual from Bing. It lists all the jet sizes and all parts available for all OEM applications. $11 is chump change for all details in depth for all the Bings, both slide and CV's of every type. Step by step, function, teardown, reassembly, setup and tuning.

[rkjjeep]

Originally Posted by Tripletreat

My 1988 R100GS has #45 pilot jets. I'd like to go one size richer, but my local BMW dealer does not sell such a thing (?). The parts fiche doesn't even mention the jet size(s). The Bing Carb website doesn't mention Bing carburettor jets either. What's up with this? Surely a range of pilot jets is available, but where?

I've always been able to make my R100GS's run "right" with the stock jets, all around. Even with a 45 pilot the mixture screw is only out about 3/4 turn. I have seen the 48 pilot richen up the just past 1/8 throttle transition to the mid range circuit for a little better driveability there. Make sure your 45's are whistle clean, and then I wouldn't ever go bigger than a 48.

[Rapid Dog]

Originally Posted by Lomax

I am looking for any advice anyone has on what to do here.

What's the clearance issue? The clamps too small?

Can you use spacers some how? The frame bolt is actually an engine bolt that can be pushed/pulled either side. You might try finding an earlier model bolt that's longer.

[Rapid Dog]

Originally Posted by Rapid Dog

...exactly, Rick is sending me one also, as I have surging and blubbering, and off idle sputtering.
Actually he sent another and it was dead...so I'm waiting.
I was told that 'some of the modules were bad'...
Likee I said, I'm staying positive...

Got my new module from Rick. With that and the corrected timing, the bike is running famously! All good.

[Tripletreat]

The transition from idle to acceleration has a rather flat spot which seems to suggest leaness. Once the needle/needle jet begins metering it all works well. I did pull the pilot jets and verified they are clean. I'm gonna run some sea foam through a tank of fuel and see how they respond. The carbs are probably due for a proper rebuild as they have a lot of miles on them, but that's something I'd rather due next winter. Summer's for ridin'!

It's not a big deal, just something I noticed again when I was prepping the bike for my grand SW Tour. To a certain extent the flat spot has always been noticeable, I just never got around to trying to tune it out.

Tomorrow I'll set off for a big loop down western Nevada/eastern Califa toward 4-Corners and points east, then up through the Rockies before heading west to Idaho again. I'm kinda worried about the wildfire in northern Arizona. It looks like that will figure greatly in our plans/route.

[mark1305]

rkjjeep said in his sig line: "Current ride is 1995 R100GS PD Classic that I could not afford new and can almost afford now. 30 airheads have come and gone and over 70 other bikes as well. When my wife gives me a hard time about the hundred or so bikes I just tell her to be damn glad they weren't women."

Well said! That's worth quoting.

[Lomax]

Originally Posted by Rapid Dog

What's the clearance issue? The clamps too small?

Can you use spacers some how? The frame bolt is actually an engine bolt that can be pushed/pulled either side. You might try finding an earlier model bolt that's longer.

thanks for the advice. The clearance issue is with the bigger pipes the stand mounting bracket will not fit within 1/4 inch of the engine mount.

My latest thought is to take some flat stock and mount it between the front and rear engine mounts. Then mount the side stand to the plate.

You also have a good idea with moving the mounting bolt over more to the left side and using a spaced. I will look into that.

Marc