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2013 R1200rt spark plug replacement interval?

The service schedule sez 40,000 kilometers (just under 25,000 miles).... but if it looks worn, no harm in changing it sooner. Some of that depends on the type of plug used ("standard" or platinum or iridium etc.), but use your judgement. Iridiums generally last longer, but keep in mind that a bike stresses the plugs more than a car does.
ALWAYS check the gap before installation, and if it's an iridium tip, use great care not to ding it when bending the outer electrode.
 
Here's a copy of the BMW Motorrad Maintenance schedule:
 

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  • R1200RT-DOHC_12K_Annual.pdf
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Ah, that .pdf shows 20,000 klicks, or just over 12,000 miles. My info came from an on-line service schedule (I forget which place), but iridium plugs really should last longer than that...
 
Ah, that .pdf shows 20,000 klicks, or just over 12,000 miles. My info came from an on-line service schedule (I forget which place), but iridium plugs really should last longer than that...
Cadillac uses Iridium plugs from the factory and recommends they be replaced at 100,000 miles. Since our motorcycle engines operate at what is often more than twice the RPM I suspect 36,000 miles might work.
 
I ran Iridiums for a while at 2x the service interval, so for 24k miles. I didn't notice any true improvement in power, gas mileage, etc., I did realize when I went to replace them, four original plugs were a bit cheaper than 4 Iridium plugs, even with twice the service interval on the Iridiums. However, I generally don't mind wrenching on the bike...
 
Just picked up a well-used 07 R1200RTP and was checking the plugs. There was some telltale power surging at lower rpms, which led me to question the condition of the secondary spark plugs. Mind you, this bike was allegedly getting dealership service.

Glad I checked. The fasteners down there were frozen shut, and it looked like the secondary plugs hadn't been changed since the bike rolled off the assembly line.

IMG_20241004_173744465_HDR.jpg

Instead of iridiums I'm trying an alternative from E3.
 
With that kind of crapatation buildup, I'd be surprised if they were firing at all, and if they were, it would be pretty weak.
Are you willing to disclose which dealership...?
 
With that kind of crapatation buildup, I'd be surprised if they were firing at all, and if they were, it would be pretty weak.
Are you willing to disclose which dealership...?
It was BMW of western Oregon, but now that I think of it, I'd want to go back through the receipts and see if it itemizes how many spark plugs were put in for the job. It came with the maintenance record from 16K to 58K miles from the dealer, then no records from there to when I got it at 75K miles. It is possible that the plugs could have been changed way back when, but from the condition of them and the frozen fasteners I didn't think so - my opinion FWIW.

The engine performance was much improved with 4 new plugs.
 
With the evolution from Hexhead to Camhead the physical size of the spark plugs was changed.

Consequently the replacement interval was changed from 24,000 to 12,000.
 
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