GS1200 Gearbox Blown Up

what you need is facts to back up your opinion. i'm not saying you're wrong, but i didn't see any facts to say you're right.

anyway, it's bedtime in my part of the world. so goodnight :)
 
probably not they probably ask for a box that fits with these ratios and an MTF of whatever. It will be more complicated than that but thats the general idea. If your going to spec everything then you would make it yourself. Its the way industry works these days. Its probably Hella that makes the lights, Mahl that makes the pistons and so on. I am sure you will get the idea though.
 
what you need is facts to back up your opinion. i'm not saying you're wrong, but i didn't see any facts to say you're right.

anyway, it's bedtime in my part of the world. so goodnight :)

The thing is, to me my opinion in this case is a fact. Yours certainly may vary.

Nighty night, sleep tight! ;)
 
probably not they probably ask for a box that fits with these ratios and an MTF of whatever. It will be more complicated than that but thats the general idea. If your going to spec everything then you would make it yourself. Its the way industry works these days. Its probably Hella that makes the lights, Mahl that makes the pistons and so on. I am sure you will get the idea though.

Sad but true, I'm afraid.

Like when we see "Made In USA" on something here, it really means "Assembled In USA Using 95%-99.9% Cheap-Assed Chinese Crap Parts"! :(

Just a sorry state of affairs!
 
IMO they're facts, IYO they're opinions. That's your opinion - so what?

'IMO'- "In MY Opinion"
so the things you say, you admit, are your opinions.......

Support your 'opinions' with some concrete facts and you might dig your way out of this, but insisting that your opinion is a fact just because you think it is one is a bit like a 4 year old stamping their foot and screaming "Because I say so!"

Like when we see "Made In USA" on something here, it really means "Assembled In USA Using 95%-99.9% Cheap-Assed Chinese Crap Parts"! :(

95-99.9% CHINESE parts?

If we gave you a globe to point your gun at, do you think you could even say where China even is?

Cookie was right to go to bed.......you Sir, are a prize dingleberry :thumb2
 
'IMO'- "In MY Opinion"
so the things you say, you admit, are your opinions.......

Support your 'opinions' with some concrete facts and you might dig your way out of this, but insisting that your opinion is a fact just because you think it is one is a bit like a 4 year old stamping their foot and screaming "Because I say so!"



95-99.9% CHINESE parts?

If we gave you a globe to point your gun at, do you think you could even say where China even is?

Cookie was right to go to bed.......you Sir, are a prize dingleberry :thumb2

Hey, if you don't like what I have to say, then don't read it and then whine about it. Pretty simple.

I'm not trying to convince you or anybody else that I'm right. I stated my views as opinions to begin with. Seems like you're the one stamping your little foot and demanding "facts".

Also, again just an opinion on my part, calling people derogatory names just because they don't think like you is pretty juvenile too, don't you think?
 
Failed Gearbox in Australia

I had a R1200GS November 2005 model until March 2008, (approx 27,000 kls when gearbox failed)

Returning from the Phillip Island World Superbikes round in Australia a roller bearing seized

in the gearbox, snapped the main shaft and punched a hole in the front of the gearbox case.

Back wheel locked up and nearly tossed me over the bars.

Gearbox oil then flowed over the clutch and then down onto the hot exhaust, lots of white smoke but luckily no fire.

This occurred 3 months outside of the BMW warranty and BMW Australia washed their hands of the matter, not even goodwill

parts was offered to repair. BMW dealer then slugged me $1000 for the teardown and inspection.

Had to retrieve the bike in bits from the dealer as they wanted to charge $80 a day while the bike was on their mechanics stand.

I ended up using a second-hand gearbox to fix myself and then sold the bike. To say I was unhappy with the dealer and BMW

is an understatement. BMW stated it was owner abuse that caused the failure. I don't how owner abuse causes a mainshaft to snap.
http://jmunday.smugmug.com/Motorcycles/Bike/i-hTn7ZHZ/0/L/photo3-L.jpg
http://jmunday.smugmug.com/Motorcycles/Bike/i-v2QmZFW/0/L/photo2-L.jpg

BJNSW :tears
 
In the posted photographs the selector fork has failed which either happened first causing the failure, or was a subsequent result of the failed box. If a bearing itself fails surely it would result in some pretty grim noises, but wouldn't lunch the selector?
I've had car gearboxes fail due to synchromesh rings breaking up and causing the box to seize, but when bearings have failed they usually result in a definable whining.

Edited to add ... hadn't read your post whilst I was typing!
 
In the posted photographs the selector fork has failed which either happened first causing the failure, or was a subsequent result of the failed box. If a bearing itself fails surely it would result in some pretty grim noises, but wouldn't lunch the selector?

The selector failed on mine and lunched everything else in the box. It had done 73,000 at the time and was as smooth as silk right up until it failed. There was nothing wrong with the bearings as far as I could tell:thumb

I think the gearbox on a GS is a pretty rugged piece of kit and failure seems a rarity despite some of the usual suspects trying to say the thing is not up to the job :augie
 
Don't know if it is of any use to you but there is a gearbox from an 08 for sale on the BMW Club site.
 
R1200GS Gearbox

[email protected]
if you need a gearbox send me a message , i have a one stood in my dads garage ,in perfect working order,but i wont be able to get my hands on it for a week as he is in tenerife.
if you want it you can have it for 360 quid delivered.:thumb

Fizzer, Can you drop me a note at my email address as I'm interested in the gearbox you mention in your post.

Ta
 
gearbox

i have sent you an email mate,but it bounced it back to me,dont know why,if want any info give me a call or text.
thanks 07825037159 ian
 
I wondered that so I did some research and found the specifications for the gearbox which BMW supplies to Getrag. One of the key requirements is a short spin-down time on the shafts so that 1st gear is engaged silently because BMW owners don't want their bikes clunking into first gear. Of course, this is also why changing gears silently is such an art.

Getrag achieve this short spin down by fitting sealed bearings which have more drag than open ones. It seems to me that one engineering solution begets a whole set of other problems.

Well that explains why when I borrowed a R1200RT from dealer the other week that I kept thinking it wasn`t going into first as there was no clunk, very disconcerting:eek:
 
Failing gearbox bearings cause a whine long before anything lets go. So sealed bearings cant be the issue on something that's just exploded. More likely something such as a selector fork breaks and the debris takes out the gears with a bang.

That's my opinion, but just listen to many older cars usually driven (usually slowly by some old guy). If its got that distinctive DC motor sound that goes up and down with the car's speed - its a failing gearbox bearing. Bikes have straight cut gears so worn bearings make them sound more like an old HGV on a steep hill with much more noise under load.

My issue with the Hexhead transmission is the apparent lack of a torque damper. The gear shift is great when you get it right, but when you don't it's a very sudden torque reversal often with a clack as the backlash takes up.
 
One plus for sealed bearings in a gearbox is that gearbox's naturally ability to shed derbies into the oil, just check the pile of metallic paste on your magnetic drain plug if you have fitted one.

Obviously preventing this material getting onto the bearing surface causing premature wear can only be a good thing

Recommend regular oil changes (6K Miles) and magnetic drains for boxes and final drives.


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