I just found a crack on my k100 RS 4V exhaust.  I am wondering if the k1200rs exhaust will fit.  I expect to need to fabricate mounts.  I am also not worried about the rear luggage or foot rests as I don't have luggage and will be putting a custom rear set on anyway.  My main questions are if it will bolt to the head, I suspect it will, and if it will clear the rear of the transmission before it sweeps up.

I have done some searching but can not find a definitive verdict.

Any help would be great.

Thanks.

YES

Excelent,  thanks.

The very heavy, upswept muffler will need a mount fabricated up to the rear frame and the very heavy catalyst might conflict with the original centre and side stands. Also, it weighs 28.9 pounds (13+ kilos). I recently took the entire system off my K1200GT. But anything can be done.

Well I just got back from checking out the K1200RS exhaust I found locally.  I decided to take the bike along on the trailer to test the fit before I bought it, glad I did since it is not workable.

I can confirm that the bolt pattern on the head is the same, and the exhaust does appear to be able to clear the transmission, however, what I wasn't expecting is the catalytic converter protrusion hits the front of the rear tire. So without extensive modification of the exhaust it will not fit.  

The bike has the longer para-lever swing arm but the tire does not clear the protrusion by several inches. I should have taken a photo but forgot to. 

I guess now I am in the market for an aftermarket exhaust or the BSK 4-1 Collector.

Cheers.

How does the K1200 manage the clearance on the cat?  I thought it is derived from the same root design -- the classic K.

I know the K1200 has a different transmission, swing arm and rear end, so something must make the distance from the engine to the rear wheel longer.  I just looked up some specs and there is almost no difference in overall length between a k1100rs and k1200rs.

K1100rs - 61.6"
K1200rs - 61.02"

So the K1200 engine must sit further forward and closer to the front wheel in the K1200 Frame.