Mini TAT Prep - R100GS Maintenance

[hardwaregrrl]

Originally Posted by Stagehand

If the petcocks are like mine, they are off when the handle is sideways, either way, and On when the handles are down. Reserve when the handles are up.

Nope, not like yours. The HPN tank I have is the when seated on the bike, the right side is off towards the front, on is straight down on both sides, reserve is back. Left side, back is off, forward is reserve. The price we pay for those tanks, it's a crime they didn't take the time to manufacture two different petcocks!!!! aholes....

[Twin headlight Ernie]

From what I've seen so far the write took longer than the work. 2HE

[nick_rhinocycles]

Anyone know the Torque Spec for the Bash Plate? Do you Loc-Tite those puppies?
I lost a bolt on my last ride, can't seem to find the torque value!

HPN tanks are not like the BMW tanks, they do only use one petcock. Too bad.

Well, Its taking a long time, since I get short bursts of work in...

Re-doing the centering of the swing arm:




4mm Wrench







This time I did only very small increments. 1/8 a turn per side



If I was off when it tightened down, I backed everything off and started again.

Going slowly and doing it a few times did the trick. need to test ride it first but by measures, it's CENTERED!




Two other things to note. You need to remove the rear wheel to take pressure off the Swing Arm.
Also, Support the bike very well. Or you could use the ... uh.. cneterstand!




Final Torque



I feel like this wheel has come off and on about seven times in the last few days.





Re-install the "Speed Caps" as I like to call them...
\


Final Touches (yeah right, ( ..*final*...)




And map...





A quick Oil Change then install this:




I wish I could change the oil with the bash plate on. Maybe next time this comes off I'm getting the whole saw out...

--Nick

[fishkens]

Originally Posted by hardwaregrrl

The HPN tank I have is the when seated on the bike, the right side is off towards the front, on is straight down on both sides, reserve is back. Left side, back is off, forward is on. The price we pay for those tanks, it's a crime they didn't take the time to manufacture two different petcocks!!!! aholes....

Originally Posted by nick_rhinocycles

HPN tanks are not like the BMW tanks, they do only use one petcock. Too bad.

Interesting. My HPN tank has two different petcocks (off is forward, on is down and reserve is back on both sides). I bought the tank in '90 or '91 so maybe they provided different petcocks back then?

It's been awhile since I had the petcocks out but do you think you can swap the reserve straw to the other hole on one of your petcocks so they both work the same?

[bgoodsoil]

It's been awhile since I had the petcocks out but do you think you can swap the reserve straw to the other hole on one of your petcocks so they both work the same?

Um....why didn't I think of that?

Genius! I'll yank mine and see what I can come up with.

[Stagehand]

Bash platee nut torque is not much! The threads are vulnerable. And yes loctite!

[fishkens]

Originally Posted by bgoodsoil

Um....why didn't I think of that?

Genius! I'll yank mine and see what I can come up with.

Unless if those geeks conspired against us and made it somehow impossible to move the tube. That'd figure.

Originally Posted by Stagehand

Bash platee nut torque is not much! The threads are vulnerable. And yes loctite!

If the bolts are the same size as the oil pan bolts that should be a good starting point (6.5 ft pounds per Clymer). Nicht uber!

[Stagehand]

Very little like tem. The bash pate bolts are maybe an M6 I think, or an 8 but the head is a 27 or 23mm. Plus the threads bottom out in the soft underbelly of the oil pan, compared to the cozy platitude of the engine case for the oil pan threads. So just make the heads sink flush, there's a recess in the bash plate for the head, and snug it. My humble experience.

[fishkens]

Originally Posted by Stagehand

Very little like tem. The bash pate bolts are maybe an M6 I think, or an 8 but the head is a 27 or 23mm. Plus the threads bottom out in the soft underbelly of the oil pan, compared to the cozy platitude of the engine case for the oil pan threads. So just make the heads sink flush, there's a recess in the bash plate for the head, and snug it. My humble experience.

Ahh, that's different than the bolts that hold the mini bash plate on my '88. It uses the same M6 with 10 mm hex head bolts as the oil pan. The small bash plate doesn't have the recesses for the screw heads that the big ones do.

Regardless, I'll bet their both M6 and should not be cranked on to tighten 'em up.

[bgoodsoil]

While I concur with your assessment of the bash plate, I think you are misusing the word 'platitude.'

Use blue Loctite on everything, man. Road bikes might get away without it but a GS won't. Heck, I don't really trust the loctite--I replaced every nut on my bike with nylox.

[One Less Harley]

Those are universal petcocks and are older than what Jenna and Brad have. My '91 tank had petcocks similar to those pictured, but a left and right.They leaked and I couldn't find a repair kit for them, so got Acerbis (OMG)ones from Just gas tanks, but the levers shut are reversed on Lt and RT. Of course if your anal about that kind of thing it can be fixed..... BTW not possible to just switch the tubes I tried, If I remember correctly to switch levers with re-machined internals, tubes had to be switched also.

[fishkens]

Hmmm, it sounds like they just went to the bin and grabbed whatever petcocks were handy.

My petcocks have the levers on the outside but they're metal so we have at least three different versions. I took 'em apart and replaced the o-rings when they got tired.

Agree with Jenna that for $800 - $1200 they should come with serviceable petcocks that work alike.

[nick_rhinocycles]

Man... last few things.
Put on bash plate, change oil. Check valves.



Oh and this

Note the crazy tubular crush washer.

PS -- in real life, my hand does not look that freaky.



Bash Plate, anyone recognize it?




What holds it on.
Note the bored out hole... that's what happens when you lose the front bolts on the freeway, and the back wears and wears...





Oh man... It ate a hold in my cat.





M@%@^$*^%*^&%*^!!!!!




Can you see the gap on the bumper?




I loosed EVERYTHING on the exhaust, then put a jack under the CAT to get more clearance for this Mofo, but to no luck. After an hour of fiddling around I came up with a solution that only you will see:




Can't say I like it but I'm out of time. Design issue.





Here I tried to LocTite the spacer to the bash plate, a fiddley mess.




Touching and rubbing. It can be a good thing. Not here.

In case you can't tell this is the stock header in the pic. I actually removed the Supertrapp headers that came on the bike because this bash plate did not fit them (they have a wider profile).
That and the fact that they exhaust out the side, which is just retarded. What? Melt my 80$ $BMW$ Tail Light? No, thanks.








Looks great, but man I could use less hassle.




in my mind the bash plate should have this:
* Rubber bumpers
* mounted to Frame or other "solid" part of the bike
* should either NEVER have to be removed OR
* should be easy to remove. As in, clip the zip ties and it drops down.

I'm no magician, but come on.... mounted to the oil pan? Really? BMW Fail.

All LocTited down. If this does not stay (last trip, it came off and I had to strap it to the back of the bike!) I'm leaving it in the desert!

Valves were close enough that I decided not to bother.

Time to pack!

-N

[supershaft]

I have heard other inmates calling the exhaust collector/plenum a cat but it isn't a cat. Just a collector/plenum. Oilheads were the first beemers with cats.

[nick_rhinocycles]

Well, we made it back... I'll post a ride report this weekend, and show you guys what held up and what did not on the trip!
Man what fun we had!

I think I have both wheels off the ground, and documented! LOL