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Old 04-15-2006, 03:21 PM   #1
heebeegeebee OP
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Question Hexhead Throttle Body Sync Help

I've searched the threads but was unable to determine if the R1200 throttle body sync could be performed outside the shop and if so what tools are required. If possible could this procedure be described for us home maintenance guys. Thanks
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Old 04-15-2006, 04:23 PM   #2
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I would say its the same as the oilheads - same concept and tools really....

My 12GS just went over 10,000kms and MIGHT need a TB....

My BMW Club has a service day on 20 May, I'll have a stab at it then....

(good thing that, everyone brings in airheads, oilheads, hexheads, along with all their tools and the club tools, and for a whole day we play around and service each other bikes showing how to do stuff.....good to be in a club!)
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Old 04-15-2006, 05:18 PM   #3
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You can only sync the throttle cables, not the idle. The idle never needs to be adjusted because it is controlled by the computer using stepper motors. Unfortunately the hex heads idle much rougher than the oil head because of much less flywheel weight.
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Old 04-15-2006, 05:23 PM   #4
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Quote:
Originally Posted by rc46
You can only sync the throttle cables, not the idle. The idle never needs to be adjusted because it is controlled by the computer using stepper motors. Unfortunately the hex heads idle much rougher than the oil head because of much less flywheel weight.
I wouldn't say MUCH rougher, but it definitely does its own thing.

I use the Twinmax to adjust the off idle setting of the cables.

Jim
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Old 04-15-2006, 06:23 PM   #5
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I just today used the twinmax to do my R 1200 GS for the first time too....

The cables did need a bit of adjustments, with just over 6K mikes on the bike...I adjusted the twinmax to balanced "0" at 2, 3, and 4 K rpms....it did seem to make a difference especially just off idea....I also adjusted the throttle cable slack to spec, and checked all the cable joints and the like...

Personally, I wish we could do an idle adjust too...I had all this super high tech stuff...it makes it less user friendly....and makes it more needed to have the dealer at least occassionally put the bike on "the Computer" to do a diagnostic and to adjust with the computer to the ECU....

Oh well....we do what we can...

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Old 04-15-2006, 06:27 PM   #6
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It's beyond easy with a twinmax. You only need to adjust the right side TB cable. Less than a 5 minute job once the bike is warm.
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Old 04-15-2006, 07:52 PM   #7
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Quote:
Originally Posted by heebeegeebee
I've searched the threads but was unable to determine if the R1200 throttle body sync could be performed outside the shop and if so what tools are required. If possible could this procedure be described for us home maintenance guys. Thanks
You need the BMW computer AKA GT1 to do the initial synch of the throttle bodies because they have computer controlled stepper motors for the idle.

After that, yer Twinmax, Carb Stix, 33 8 130 carb/tb synchronizer will work.

I strongly recommend you take it to your authorized BMW Motorrad dealer to do this procedure.
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Old 04-15-2006, 07:53 PM   #8
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Thanks

Well Jim, daotoys & stuff2c if it's good enough for you it's good enough for me. Just placed the order for a Twinmax with BMW socket power point. Looks to be exactly what I need and look forward to being able to fine tune the ride. Jim I really enjoyed your post regarding valve adjustment and want to thank you for taking the time to make this info available to us. Has anybody purchased the BMW Repair Manual CD? If so is it any good -worth the money-how much-anybody got a copy??? Thanks All.
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Old 04-15-2006, 08:24 PM   #9
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Thanks Pinecone- The bike was in for it's first service last week but now with 2200 km. the engine is rough at 2500-3000 RPM in town, is this the situation where home fine tuning would help??
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Old 04-15-2006, 08:33 PM   #10
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Quote:
Originally Posted by heebeegeebee
Thanks Pinecone- The bike was in for it's first service last week but now with 2200 km. the engine is rough at 2500-3000 RPM in town, is this the situation where home fine tuning would help??
More than likely...But a proper valve adjustment is a must. I got the CD manual on ebay and it seems to be in order. $3.99 plus $7 shipping and is most definitely a pirated copy.
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Old 04-15-2006, 08:44 PM   #11
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Quote:
Originally Posted by pinecone
You need the BMW computer AKA GT1 to do the initial synch of the throttle bodies because they have computer controlled stepper motors for the idle.

After that, yer Twinmax, Carb Stix, 33 8 130 carb/tb synchronizer will work.

I strongly recommend you take it to your authorized BMW Motorrad dealer to do this procedure.
Pine cone is correct his BMW shop did mine friday and the roughness is all but gone. Idles @ 1100 hot or cold now.
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Old 04-15-2006, 08:50 PM   #12
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Quote:
Originally Posted by heebeegeebee
Thanks Pinecone- The bike was in for it's first service last week but now with 2200 km. the engine is rough at 2500-3000 RPM in town, is this the situation where home fine tuning would help??
Twin max fine tune under load makes it purrrrr.
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Old 04-15-2006, 08:56 PM   #13
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Quote:
Originally Posted by STUFF2C
More than likely...But a proper valve adjustment is a must. I got the CD manual on ebay and it seems to be in order. $3.99 plus $7 shipping and is most definitely a pirated copy.
Most definitely a pirate copy.

I hope it works OK.
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Old 04-15-2006, 09:00 PM   #14
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So far...So good. When I got it, I spent a few hours off and on messing about and looks like alls well.

As much as I hate to admit it $11...I knew what I was getting.
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Old 04-15-2006, 09:23 PM   #15
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I have researched this topic on a number of sites, and I believe that unfortunately, the BMW dealer and/or his/her high tech computer toys are a needed item if the problem is truely an idle/low rpm/closed throttle roughness...

An owner, without the computer acess equipment can use the twinmax and/or similar types of tools to adjust/sync the cables and initial TB open throttle functions...

If you use the twinmax and/or a similar type of adjustment, and you still have idle problems, the the BMW dealer is the best fix....

Now, if/when you or I can buy an affordable ECU accessing tool to do the fancy black box brain surgery needed for this more complex work....then Ill buy it and learn how to do more of my own work on the bike....

just my thoughts
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