HP2 Sport; the facts 2

[Dr. Curve]

Up tomorrow morning. Shave chin and sides. Go to bank. Get check for what ever I can. Take quick run to BMW dealer, Dusty Miller, and leave check there. Head for home. Start making marks on the computer room wall every 24 hrs. Count them till the truck comes in......................

What a bike, with it's wonderfully efficient and simple engine. Losing weight and working out..................here in bumpy flats.

[Deans BMW]

Damn, I am a poor retired slub, that bike has created more bike lust to date than anything I have ever been priviledged to see.

I can see now, many trips to SJBMW, only 950 miles away, to ride the pants of of theirs.....Chris, get my room ready.......PLEASE.

[R111S]

I'm really glad this motor has proven its METAL in Endurance Racing because it looks like there is a cyclic thrust load on the Camshafts because of the Conical Cam Lobe Profiles.

Can't you just imagine the cam bearing thrust loads from getting hammered back and forth (intake Lobe, then Exhaust Lobe, then Intake Lobe, etc.) at high RPM?

[Eisernkreuz]

Originally Posted by R111S

I'm really glad this motor has proven its METAL in Endurance Racing because it looks like there is a cyclic thrust load on the Camshafts because of the Conical Cam Lobe Profiles.

Can't you just imagine the cam bearing thrust loads from getting hammered back and forth (intake Lobe, then Exhaust Lobe, then Intake Lobe, etc.) at high RPM?

Granted, I'm only a Mech/Aero engineering student and hardly an expert on modern engine design, but I'm thinking since the angle of the valves is so close to the perpendicular axis (the direction of piston travel), the forces are low enough that the camshaft bearings and what not, can hold it in place without a high risk of failure. What other forces (other than F=-kx from the spring) does the camshaft have to overcome to open the valve? Some friction, this and that..but because of the relatively small angle, the force in the direction along the camshaft axis is probably something like <5N. What do you think? Even a low force like that repeated back and forth in opposite directions over millions of cycles could be an issue over time? I honestly have no idea..but figure that regular maintenance should be enough to ensure problem-free operation. After all, it's BMW..

[Towjam]

Originally Posted by Eisernkreuz

Granted, I'm only a Mech/Aero engineering student and hardly an expert on modern engine design, but I'm thinking since the angle of the valves is so close to the perpendicular axis (the direction of piston travel), the forces are low enough that the camshaft bearings and what not, can hold it in place without a high risk of failure. What other forces (other than F=-kx from the spring) does the camshaft have to overcome to open the valve? Some friction, this and that..but because of the relatively small angle, the force in the direction along the camshaft axis is probably something like <5N. What do you think? Even a low force like that repeated back and forth in opposite directions over millions of cycles could be an issue over time? I honestly have no idea..

Ya' had me...

...up to this point.

...but figure that regular maintenance should be enough to ensure problem-free operation. After all, it's BMW..

[YellowRacer]

Originally Posted by Eisernkreuz

Granted, I'm only a Mech/Aero engineering student and hardly an expert on modern engine design, but I'm thinking since the angle of the valves is so close to the perpendicular axis (the direction of piston travel), the forces are low enough that the camshaft bearings and what not, can hold it in place without a high risk of failure. What other forces (other than F=-kx from the spring) does the camshaft have to overcome to open the valve? Some friction, this and that..but because of the relatively small angle, the force in the direction along the camshaft axis is probably something like <5N. What do you think? Even a low force like that repeated back and forth in opposite directions over millions of cycles could be an issue over time? I honestly have no idea..but figure that regular maintenance should be enough to ensure problem-free operation. After all, it's BMW..

I think it all works because of some fairy dust!

[Eisernkreuz]

Originally Posted by Towjam

Ya' had me...

...up to this point.

Well, consider the alternative. What if Ducati had made the radial valves and conical cams? They can't even make rocker arms that don't fail and wreck your cams within 6000 miles. I trust BMW to do their homework when implementing something new.

[Dr. Curve]

Good point Miran.....
The cam lobes are barely 90 degrees apart. No matter when one lobe is contacting its jack lever, which in turn opens the valve................the other lobe on that cam is in equal contact with the other jack lever that opens the other valve. Things cancel out forcewise. If lobe toe centers were 180 degrees apart.........now that might me another matter. No problem with this design however.

[Eisernkreuz]

Interesting point, I was focusing on each individual cam lobe and not looking at the entire system in motion.

<-- learned something new

It's been a pleasure bouncing ideas off of you guys

[mkletecka]

The more I look at the HP the more I want one, and bet this is going to be one fantastic machine, man is it sweet! Also, being a recent purchaser of a new r1200s, it hurts a bit to know that the HP is on it’s way and that I had better start seeking some investment opportunities so as to be in a financial position to maybe have one, for if it is substantially better than the R1200S, as the R1200S is substantially better than my old R1100S, I will diffidently want to have one.
Also, being on my soap box, I want to say to all who wish, want place side luggage on your R1200S’S and also be able to put your woman on the back (which, actually haven’t been that many on this forum come to think of it) anyway, run ,don’t walk and get yourself a GS, RT, ST, LT, for the R1200S/HP is BMW’S version of a sport bike, unlike the old R1100S, which was more of a sport touring machine. If, ya need to have to have luggage on the R1200S and don’t want to drill holes into the nice body work to fit the expensive factory bags, check out RKA or the ”the cycle guys.com rack @ $60.00 along with a $100.00 Ortlieb waterproof travel bag” and you will be able to go cross country if you like.
One reporters opinion /comments…………………

[Deans BMW]

I agree 100%.

Originally Posted by mkletecka

The more I look at the HP the more I want one, and bet this is going to be one fantastic machine, man is it sweet! Also, being a recent purchaser of a new r1200s, it hurts a bit to know that the HP is on it’s way and that I had better start seeking some investment opportunities so as to be in a financial position to maybe have one, for if it is substantially better than the R1200S, as the R1200S is substantially better than my old R1100S, I will diffidently want to have one.
Also, being on my soap box, I want to say to all who wish, want place side luggage on your R1200S’S and also be able to put your woman on the back (which, actually haven’t been that many on this forum come to think of it) anyway, run ,don’t walk and get yourself a GS, RT, ST, LT, for the R1200S/HP is BMW’S version of a sport bike, unlike the old R1100S, which was more of a sport touring machine. If, ya need to have to have luggage on the R1200S and don’t want to drill holes into the nice body work to fit the expensive factory bags, check out RKA or the ”the cycle guys.com rack @ $60.00 along with a $100.00 Ortlieb waterproof travel bag” and you will be able to go cross country if you like.
One reporters opinion /comments…………………

[hawkeyejohn14]

Originally Posted by EZ-RIDER

it a cool bike and a better replacement for the R1100S

I like the looks of the R1200S, side by side the 12 and 11 each look good in their own way with the 12 having a little Bangle influence imo and being a little more industrial and purposeful with more visuals on the engine, which I think is a good thing. The 11's are more flowing like the early RT's, kind of Dolphin like with smoother lines. I enjoy both.

This HP2 and it's cousin the HP2 Moto is as close to single purpose as BMW have ever built imo.

[Izze]

Any chance that someone with Photoshop talent could make the below HP2 Sport totally black?

[Dr. Curve]

Made my Bank Check deposit to the dealer about one hour ago. It appears.............but don't hold me to this.......that the bikes will be available in multiple colors. I would like a black one but will settle for whatever one they send. I am on. Who else is going to order one soon so as to get one of the first ones out? A 2.62 rear end is available for the bike as a factory option..........not that its needed.

[RoLoo]

Originally Posted by Dr. Curve

...I am on...

...good !...


...a bit of a black one like this ?...


(but than of course without the RoLogo in red & white...)

[dradylee]

After concluding that I'm way too old for this sort of thing I called my dealer and told him that I'm in for an "HP12". Sent check..... time to go for a quick spin on the R12S, need all the practice I can get. Any of you folks interested in an absolutely wonderful Honda RC30?

[Eisernkreuz]

Somehow I get the feeling that this bike won't be that easy to find on the used market in the coming years. Or if it does, I won't be able to get a screaming deal on it like I did on my R11S haha

[Dr. Curve]

Well for sure, Dean, Dradylee, most likely RoLoo..........myself and others, I'll bet. Mike Kelly comes to mind as someone who would be problematic in the mountains on one of these........and I could mention others......but I already KNOW they are scheming as we speak. BMW riders in N.C., N. GA., TENN, N. CALIF., MO., TEX..........and other areas as well are rounding up change now, being good to the Missy and cheerful at work.

Like others have mentioned this new engine is the first major valve train design since the early four valve K1 and the later 4-valve twin. Still.................and this is what we like.......this new twin is the first non "boxer" push-rod twin from BMW in 84 years.

These will not linger long on the showroom floor...........

Now, if we just had any idea of when. First 100 to be shipped by Jan 15?????? I doubt it. More like we ride off on one by the first week of April. Anybody got a valve clearance for this new DOHC?

[shreddr]

its funny they used the Akropovic on the race bike, everything else looks almost identical, except the headlights.

[Deans BMW]

I'll be at San Jose Oct 11 preping for the Daytona race, trying to find out any scuttlebut, if I can, I'll post.