want2wheelie
Guest
I hace heard rumours of a new design boxer motor coming out next year, this was specifically for the 1200GSA - anybody know anything about this
herrdirektor
Registered user
Something I picked up too, so the production stop of the GS model could be related to this. Just for a color change the factory line would not be stopped. Something technical should be behind it. We'll see soon. 
HORIZONTALLY OPPOSED
Registered user
Not like BMW to radically fix something that ain't broke, more likely to be a little evolution to keep us interested.
Is it just me, or is the concept of an 'Adventure' motorcycle that needs 98 RON fuel perhaps somewhat misguided. I really hope they don't go down that route.
herrdirektor
Registered user
Ron 98 ? I figure it will surely stay within the Ron 91-95 bandwidth.
i think it's just that if you do use 98, the ecu coaxes a bit more horsepower out.
The anti-knock sensors will mean that you can put lower RON fuel in, but if you want namplate rated horsepower you'll need 98RON.
In fact if you look at the BMW spec sheets for the RT, ST and R you'll see the following notice which I guess would apply to the new GS engine:
BMW Spec Sheet said:
There is a new boxer engine coming out next year. It’s the most powerful and highest revving boxer engine ever.
It has a DOHC and produces 133bhp @9500rpm.
However, its only available in the HP2 Sport which will cost £15k
.
Now if only they would slot one of these engines into the GS….oooohhh
It has a DOHC and produces 133bhp @9500rpm.
However, its only available in the HP2 Sport which will cost £15k
.Now if only they would slot one of these engines into the GS….oooohhh
(RIP) Mark H
Formerly known as Easyrider5258 (Mark)
Some more info on the new motor,
click to enlarge
This latest member of the high-performance family draws its lineage from the endurance-racing-proven R1200S that won its class at Le Mans this year. BMW claims the HP2 Sport produces 128 hp at 8750 rpm and 84.8 ft-lbs of torque at 6000 rpm with a max rev of 9500 rpm, heralding these figures as more spunk than "the significantly modified engine of the BMW R1200S." We don't know if that's how BMW thinks of the mill in the R1200S, but according to them it churns out a claimed 122 bhp at 8250 rpm and 83 ft-lbs at 6300 rpm in standard trim.
The key difference in the Sport's engine are hopped-up cylinder heads that use a drag lever to open and close valves larger than those found in the R1200S. More performance mods include flowed intake and outlet ports, forged pistons, and "adapted" ("beefed-up" in Motorcycle.com speak) connecting rods, all meant to cope with those higher output figures mentioned above.
click to enlarge
This latest member of the high-performance family draws its lineage from the endurance-racing-proven R1200S that won its class at Le Mans this year. BMW claims the HP2 Sport produces 128 hp at 8750 rpm and 84.8 ft-lbs of torque at 6000 rpm with a max rev of 9500 rpm, heralding these figures as more spunk than "the significantly modified engine of the BMW R1200S." We don't know if that's how BMW thinks of the mill in the R1200S, but according to them it churns out a claimed 122 bhp at 8250 rpm and 83 ft-lbs at 6300 rpm in standard trim.
The key difference in the Sport's engine are hopped-up cylinder heads that use a drag lever to open and close valves larger than those found in the R1200S. More performance mods include flowed intake and outlet ports, forged pistons, and "adapted" ("beefed-up" in Motorcycle.com speak) connecting rods, all meant to cope with those higher output figures mentioned above.
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