MR1 Carnage

[boudin]

Just pulled this motor apart I got as part of a trade deal. No compression on #2. Ha. This is what happens to the MR1 when you break a rod at high RPM. If you look closely, you'll see broken rods, rings, part of the crank case, valves, and a nicely hammered piston turd.

What's amazing is the assembly still rotates smoothly.

-Greg

 

[seadude]

Look at those 5 valve heads - very exotic!

 

[Jgorm]

Hopefully you traded him a sandwich for that! That's a big job!

 

[itsdgm]

OUCH !!!

 

[Gym]

Hopefully you traded him a sandwich for that! That's a big job!

Yeah, a baloney sandwich.

 

[haknslash]

Look at those 5 valve heads - very exotic!

Yamaha practically invented the 5 valve DOHC going back to the Genesis engines. My WR250F also had them as they are very efficient and allow for high revving.

 

[Julian]

Its just a flesh wound......

 

[Cambo]

10K rpm when something goes out of sync kiss it good by

 

[thefortunes]

That'll buff right out

 

[druppert]

5v/cylinder? Wow

 

[bronze_10]

We all think of the mr1 ad an old engine but it is really a very advanced engine.

 

[Jgorm]

We all think of the mr1 ad an old engine but it is really a very advanced engine.

Hell yeah! Even the non ho is 140hp/L. That would be equivalent to my 4.6L 2v mustang having 644hp. I only have about 450 with 10lb of boost! It's beautiful when cleaned up.

 

[mark_m]

We all think of the mr1 ad an old engine but it is really a very advanced engine.

The 350 in our 1975 c3 pushed 28 hp/ liter from the factory. 160/ liter is amazing. 912 hp if the smallblock Chevy was as efficient as the Yamaha mill.