Gear Indicator Fault R1200ST

Post your 'Hexhead' technical queries here

Moderator: Moderators

skida
Forum User
Posts: 21
Joined: Mon Dec 07, 2020 3:01 pm
Country of Residence: United Kingdom
Location: Blyth, Northumberland

Gear Indicator Fault R1200ST

Postby skida » Mon Feb 01, 2021 1:55 am

I charged my battery up after being unable to start the bike. It still didn't start so started to think about a new battery. Going through all the possibilities I could think of I tried sitting on the bike and putting the side stand up. It started. The gear indicator was blank and there was no green "N" showing, but the bike was in neutral. I went for a 5 mile run to see how the gearbox was behaving and found it to be mechanically doing everything it should be doing, but the dashboard gear indicator was all over the place, sometime reading correctly and sometimes saying 3rd when it was in second, and sometimes I was pulling away in 1st with the green "N" showing.

When I got back I did a bit of research and apparently BMs from this period had a high incidence of this fault, not just STs, so I am wondering if anyone here has experienced it and what remedial action worked?

User avatar
milleplod
Forum User
Posts: 1367
Joined: Sat Jun 04, 2011 1:26 pm
Country of Residence: Bolsover

Re: Gear Indicator Fault R1200ST

Postby milleplod » Mon Feb 01, 2021 9:23 am

Its probably the gear position sensor playing up, item 4 on the attached pic. I believe the contacts can be cleaned up as a 'fix', otherwise used ones are available from Motorworks for around £60. There's 2 types depending on manufacturing date btw.
Firefox_Screenshot_2021-02-01T08-20-21.548Z.png
Pete
You do not have the required permissions to view the files attached to this post.
Nocto Diuque Venamur

User avatar
Jaythro
Site Admin/Club Member
Posts: 3314
Joined: Sat Nov 12, 2005 1:00 am
Country of Residence: Norn Iron
Location: Islandmagee, County Antrim, North East Ireland

Re: Gear Indicator Fault R1200ST

Postby Jaythro » Mon Feb 01, 2021 11:57 am

A totally crap design of thing in a crap place

They are a variable resistance rather than the previous old fashioned contact switch on the 1100 1150 oilheads

Be warned if a good clean out and drying and an application of something Like ACF50 grease doesn;t cure it

You will likely need a new gear position indicator sensor
"Put your Ass on a motorcycle and ride with an attitude and the "Grim Reaper" will ride in your shadow!"

Islandmagee in case you're interested?

skida
Forum User
Posts: 21
Joined: Mon Dec 07, 2020 3:01 pm
Country of Residence: United Kingdom
Location: Blyth, Northumberland

Re: Gear Indicator Fault R1200ST

Postby skida » Mon Feb 01, 2021 5:14 pm

Thanks for the replies fellas!

Pete: Where can I find out which of the 2 types relates to my 2005 model?
Jaythro: With my luck it will be a new sensor required. ps: I was interested and followed your link to Islandmagee. Nice place!

User avatar
milleplod
Forum User
Posts: 1367
Joined: Sat Jun 04, 2011 1:26 pm
Country of Residence: Bolsover

Re: Gear Indicator Fault R1200ST

Postby milleplod » Mon Feb 01, 2021 5:40 pm

https://www.realoem.com/bmw/select.do?kind=M&arch=0

Put the last 7 digits of your bike's VIN in the 'serial number' search box, that produces a parts list specific to your bike. Clicking on the 'manual transmission' section gives you a breakdown of part numbers. If in any doubt though, Motorworks will supply the correct one, new or used.

Pete
Nocto Diuque Venamur

Mike P
Forum User
Posts: 11
Joined: Sat Oct 10, 2020 3:02 pm
Country of Residence: England

Re: Gear Indicator Fault R1200ST

Postby Mike P » Tue Feb 09, 2021 8:53 pm

I’ve got a brand new one in its box for an 05 r1200gs. If it fits I would sell it. Cost new was I think £135.00, open to offers.

skida
Forum User
Posts: 21
Joined: Mon Dec 07, 2020 3:01 pm
Country of Residence: United Kingdom
Location: Blyth, Northumberland

Re: Gear Indicator Fault R1200ST

Postby skida » Fri Feb 12, 2021 3:49 pm

As soon as the weather becomes a little warmer (ie. above freezing) I am going to take it off and inspect it. I am hoping it can be refurbished using a Dremel, WD40 and a little wire wool.

skida
Forum User
Posts: 21
Joined: Mon Dec 07, 2020 3:01 pm
Country of Residence: United Kingdom
Location: Blyth, Northumberland

Re: Gear Indicator Fault R1200ST

Postby skida » Sun Feb 21, 2021 9:11 pm

An update:

In my Halfords Professional Box of Good Intentions, I have sockets going down to 4mm ( there isn't room for a socket unfortunately) and spanners going down to 10mm, which was too big. I eventually found a 6mm spanner in the Baccy Tin Filing System. Too small. No problem! I rang my brother in law knowing his tool collection to be fairly all-encompassing. "I need a 7mm spanner!" "Aye just come over" he replied. The 7mm was too big and he tried a different 6mm to confirm it was too small. By now he was rummaging in his rusting Brit-Bike era boxes and found a small spanner which fit - 1/4 inch!

I pictured some German Bike Builders, in 2005, saying "This batch of bikes is for UK market, so find the most awkward bolts to access and make them Imperial size - Hahahaha that will mess with their heads!" My head was so messed, I have left the job for another day. I have also since decided to just bite the bullet and buy a replacement unit, just in case a refurbishment doesn't last long and I have to do all that sh*t again.

skida
Forum User
Posts: 21
Joined: Mon Dec 07, 2020 3:01 pm
Country of Residence: United Kingdom
Location: Blyth, Northumberland

Re: Gear Indicator Fault R1200ST

Postby skida » Wed Apr 07, 2021 10:51 pm

Another update:

So I rang Motorworks to enquire about a used gear position sensor - "Sold out as we sell loads" (grrrr), So it is going to cost me £140 inc. postage so the bike knows what gear it is in. It hopefully arrives tomorrow. Hopefully, when fitted, it will also fix the problem I have with the trip display (stuck on Trip2, and won't tell me how many miles to fill up).

User avatar
george baker
Club Member 14
Posts: 7963
Joined: Mon Aug 01, 2005 10:51 am
Country of Residence: uk
Location: Manchester,UK

Re: Gear Indicator Fault R1200ST

Postby george baker » Wed Apr 07, 2021 11:03 pm

Hi
sad news, still at least you will know it works.

BTW how does the sensor work? Variable seems a crap idea to me in such an exposed position. Does each gear give a voltage? Does each gear have a resistance? How does the box select the value?

George
Member 21, R100R, and an under used K75

skida
Forum User
Posts: 21
Joined: Mon Dec 07, 2020 3:01 pm
Country of Residence: United Kingdom
Location: Blyth, Northumberland

Re: Gear Indicator Fault R1200ST

Postby skida » Thu Apr 08, 2021 11:07 am


BTW how does the sensor work? Variable seems a crap idea to me in such an exposed position. Does each gear give a voltage? Does each gear have a resistance? How does the box select the value?

George
Pass. As far as I'm concerned there could be a little gear-reading pixie contained in the box. I'm sure someone with an ounce of technical knowledge will drop in shortly. :grin:

Mjolinor
Forum User
Posts: 3270
Joined: Tue Jun 12, 2018 9:38 pm
Country of Residence: United Kingdom
Location: Burnley

Re: Gear Indicator Fault R1200ST

Postby Mjolinor » Thu Apr 08, 2021 1:38 pm

I don't understand why manufacturers went to different resistance values for different things on sensors. It works when they are new but as resistance changes with time they can never have a long life.

The steering wheel on the Smart car uses resistance for cruise, horn, indicators (I think) so with age you end up with main beam flashing when you set the cruise control or the horn blasting out when you turn left, a complete nightmare to sort out sometimes.

skida
Forum User
Posts: 21
Joined: Mon Dec 07, 2020 3:01 pm
Country of Residence: United Kingdom
Location: Blyth, Northumberland

Re: Gear Indicator Fault R1200ST

Postby skida » Fri Apr 09, 2021 4:44 pm

Final update: The sensor is fitted! What a b*st*rd of a job! The trip display also seems to be working. Hoorah!


Return to “Hexhead (R1200) Q&A's”

Who is online

Users browsing this forum: No registered users and 2 guests