Common Japanese Engine Images for Comparison...

Hey guys, I'm mucho late on this one but thought I'd stick it up there for reference anyway. These images were snapped at the 2010 Cycle World Expo in Washington DC earlier this year.

No interesting C-Motos to report at the Expo but I did managed to take some pictures of common engines that may be found in our Chinese bikes for reference/comparison.

One last note for the motor-heads, be sure to check out the Yamaha YZ450F engine internal cut-away/cross-section display at the end of the post. Reverse intake design engine is worth checking out!

:scooter:
CC


Dual Sport

- Yamaha TW200 -
http://photos.imageevent.com/mychina...Expo10-038.JPG

http://photos.imageevent.com/mychina...Expo10-042.JPG

http://photos.imageevent.com/mychina...Expo10-044.JPG

- Yamaha XT250 -
http://photos.imageevent.com/mychina...Expo10-046.JPG

http://photos.imageevent.com/mychina...Expo10-047.JPG


http://photos.imageevent.com/mychina...Expo10-049.JPG

- Honda CRF230L -
http://photos.imageevent.com/mychina...Expo10-116.JPG

http://photos.imageevent.com/mychina...Expo10-117.JPG

http://photos.imageevent.com/mychina...Expo10-118.JPG


Street

- Honda Rebel 250 -
http://photos.imageevent.com/mychina...Expo10-081.JPG

http://photos.imageevent.com/mychina...Expo10-082.JPG

http://photos.imageevent.com/mychina...Expo10-087.JPG

http://photos.imageevent.com/mychina...Expo10-088.JPG

http://photos.imageevent.com/mychina...Expo10-089.JPG


- Suzuki GZ250/TU250 -
http://photos.imageevent.com/mychina...Expo10-140.JPG

http://photos.imageevent.com/mychina...Expo10-143.JPG

http://photos.imageevent.com/mychina...Expo10-144.JPG

http://photos.imageevent.com/mychina...Expo10-132.JPG

http://photos.imageevent.com/mychina...Expo10-137.JPG


- Yamaha YZ450F - And just for fun... the Yamaha YZ-450F Engine Cutaway. Intake valves and in the front, so the exhaust comes out the back of the engine. Great design that makes a lot of sense, lets hope we see more of it!

http://photos.imageevent.com/mychina...Expo10-149.JPG

http://photos.imageevent.com/mychina...Expo10-165.JPG

http://photos.imageevent.com/mychina...Expo10-155.JPG

http://photos.imageevent.com/mychina...Expo10-156.JPG

http://photos.imageevent.com/mychina...Expo10-159.JPG

http://photos.imageevent.com/mychina...Expo10-162.JPG

http://photos.imageevent.com/mychina...Expo10-163.JPG

And there was no any YAMAHA XVS 250 or Drag Star 250?

I think the exhaust valves and pipes were traditionally placed in front of the engine and in the airstream for cooling purposes. With water cooled technology it is less important...Yamaha made a TZR 250 two stroke race replica with rear mounted exhausts exiting under the seat
....looked cool