Any issues swapping an 07 K12s motor into an 05?? - - Excellence in Motion
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post #1 of 3 (permalink) Old Jun 17th, 2019, 1:18 am Thread Starter
Join Date: Jun 2019
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Any issues swapping an 07 K12s motor into an 05??

I have a blown motor on my 05 K1200s (long story, but threw a rod through the crankcase).

I'm looking to do a swap or a rebuild.

I saw on 07 motor listed on ebay, and was wondering if there would be any issues putting a later model motor into it.

Would there be ECU or other problems potentially?

Any info greatly appreciated.


best regards,

Peter K.
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post #2 of 3 (permalink) Old Jun 22nd, 2019, 9:59 am
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Posts: 17
I'll take this one. Broke cam chain on my k1200s 2005 model last summer. Crashed all the valves but could have been repaired until I looked at BMW parts prices. NOT
Did the same thing and got a slightly used motor from a crashed 2008 and did a swap. This was a complete motor with starter alternator sensors fuel injectors. You get the idea.
Cut the mine from a place the in Texas. Totally happy with the company and product.
Only difference was the 2008 had a coolant vent line on the right side of the head. I had no place to run it to so it was plugged with the plug in the 2005 motor. No issues, I've put on several thousand miles since.
Cost me $1300-$1500 and my labor bay weekend but was well worth it.
1 runs Great
2 no more jerky throttle at low speed
3 clutch is smoother
4 don't hit neutral going from 1st to
2nd anymore.
It wasn't a bad job, some tight spaces.
Other than the motor just needed oil and filter. Header gadgets and a couple of o rings. No software changes.
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post #3 of 3 (permalink) Old Jun 22nd, 2019, 7:16 pm
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The point of no return. And I should have taken the rear wheel off.
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