800GS - Look at My Cam and Oil Leak

[996DL]

Originally Posted by Emmbeedee

Yup, right there on the diagram:

I want to be the first one to guess the correct answer !

First kudos to Emmbeedee for the savy enlarged parts diagram !

This diagram shows what appears to be a large "trough" in the cam's plain bearing surface. That surely allows the passage of motor oil to lubricate the plain bearing surfaces and the excess oil exits into the missing surface of the cam's lobes, allowing them to be lubricated as well...


What's the angry collective's views on this ?...

996DL

"It's the motor Billy."

[The Griz]

Originally Posted by 996DL

I want to be the first one to guess the correct answer !

First kudos to Emmbeedee for the savy enlarged parts diagram !

This diagram shows what appears to be a large "trough" in the cam's plain bearing surface. That surely allows the passage of motor oil to lubricate the plain bearing surfaces and the excess oil exits into the missing surface of the cam's lobes, allowing them to be lubricated as well...

What's the angry collective's views on this ?...

996DL

"It's the motor Billy."

I agree. That is exactly what it is.

[spanker]

Originally Posted by The Griz

Man, seriously, have you not read the posts and looked at the parts diagrams???

1) Rotax is not Kymco. Rotax is Bombardier. And the Rotax 798cc p-twin the F800GS is still Rotax/Bombardier.
2) The cam does not have "chunks" missing from it. Those voids are in the parts diagram. The blurry picture just makes it look "chunky." And even if the surface is a little bit rough, those voids are supposed to be there.

Deal with it:



Check out engine type 804 from the Bombardier/Rotax website. It is the the ROTAX, not Kymco, engine in the F800GS:
http://www.rotax.com/en/Engine/2004/...ine.Models.htm

Check out the Bombardier/Rotax company profile:

http://www.rotax.com/en/About.Us/Company.Profile.htm

Read 'em and weep.

P.S. No other company makes the Rotax engines or any of their parts. Any engine with the Rotax logo on it was manufactured in-house at the BRP-Rotax plant in Gunskirchen, Upper Austria.

Man, seriously, you didn't disappoint me, easy there Griz. After looking at the diagram again, I do see what appears to be "reliefs" in the cam shaft diameter. I thought the red arrows were pointing to what appears to be slots. You have to admit, it's a bizarre peculiarity seeing something as crude as a cast relief like that. My error. Thanks for the dissertation on Rotax.

[TedShred]

Originally Posted by spanker

I couldn't resist the opportunity to offer a comment and leave myself open in light of all the testosterone floating around this post. Having a 650 GS single Rotax motor which has been absolutely bulletproof, and having done the valves several times I may be vaguely qualified to offer an opinion. This cam has chunks missing from it. I don't give a crap how smart BMW or Kymco is, they would never purposely GOUGE two reliefs in a cam surface that looks like this. As one poster said, it looks like it was chiseled out by a blind guy. If BMW wanted to remove metal from a surface, they'd MACHINE IT OUT. This is total crap. I would park the bike at the dealer, take the plate off and hound BMW until the regional rep examines the bike with YOU present.

If you could convince another F800 owner to pop their cam cover and either confirm or refute that this is actually part of the "machining" process, it would put this issue to bed, don't you think?

Well you asked for it


READ THE WHOLE THREAD and LOOK AT ALL THE PICS.


Those CAMS are cast pieces that are then machined where needed. The "troughs" are obviously there for a reason so they're part of the casting.

Go ride yer fookin motorcycle and stop spreading mis-information on the intraweb

[Bigem]

Appears there is no issue at all- move on, ride the bike. Have a fucking ball!! I will!

[spanker]

Originally Posted by TedShred

Well you asked for it


READ THE WHOLE THREAD and LOOK AT ALL THE PICS.


Those CAMS are cast pieces that are then machined where needed. The "troughs" are obviously there for a reason so they're part of the casting.

Go ride yer fookin motorcycle and stop spreading mis-information on the intraweb

I gave Griz a pass but you're not getting one. It's moron's like you who use these pages to spout tough-guy shit hiding behind your keyboard. I have forgotten more about motorcycles than you will ever know ass hat. You were breast-feeding when I was working on right-shift Sportsters and Pentons with points (do you know what those are?). Go back to your Keystone lights my friend.....

[beerrun]

I must have had another senior moment. I guess that was [I money] helping me with my spelling. My apologes to you, Although with a bike that great who needs apologes! I would love to have one chunks and all.

[The Griz]

Originally Posted by spanker

I gave Griz a pass but you're not getting one. It's moron's like you who use these pages to spout tough-guy shit hiding behind your keyboard. I have forgotten more about motorcycles than you will ever know ass hat. You were breast-feeding when I was working on right-shift Sportsters and Pentons with points (do you know what those are?). Go back to your Keystone lights my friend.....

Gave me a "pass", huh?

[Achtung]

Originally Posted by ChiTown

Ladies, Ladies... you're all pretty!

I'm just going to do what needs to be done in this dire situation, go frikin' ride the bike a couple thousand miles!

I don't think it looks right, but there's not any BMW conspiracy to cover this up, I'm not an engineer. Neither are most of you...

Time will tell, either I'll blow my engine and end up with a new bike (that would be fine with me since I've already thrashed this one fairly well)
OR I will continue to enjoy this AWESOME motorbike and live happily ever after.

Thanks for ALL the replies, especially the one's that seemed to have cracked the case - no pun intended and even the one's that were emotional based, and off the original question - ADV is fun because of the drama mixed with the good info.... I just use the ADV BS filter.

See ya!

Excellent post. They should install the above mentioned filter onto the server.

[Boon Booni]

Penton




Points

[ricohman]

where's my dwell meter...............

[Maddaddy]

those look like chucks missing.

[The Griz]

Originally Posted by Maddaddy

those look like chucks missing.

Once again:


Not chunks missing. These cast voids are meant for oil passage, and are meant to be there to lubricate cam rod contact points (as shown in shop manual above). We're beating a dead horse here with this cam shaft thing. Now as for this oil leak.... that concerns me how that happened. ChiTown, please keep us posted.

[v8toilet]

I know this thing is dead but something I wanted to point out in the picture.

The texture of the shaft and the texture of the once thought missing material from the cam look to be very similar. It looks like it was cast and then the cams are machined/ground to tolerance.

The similarity/uniformity is what stood out to me even though its hard to see in the picture.


The missing x-files material was never there to begin with but Rotax could have at least made it look pretty and then this thread wouldn't exist.

[earthroamer]

Wow! I just read this thread from the beginning. You guys sure take a rough road to enlightenment.