250 Two Stroke Porn

Hey guys,

Race season is around the corner up here in Canada and I just picked up my new bike a few weeks ago. I am an intermediate rider taking the advantage of the new rule CMRC came out with. The rule states that riders can race 250 two strokes in the MX2 classes. In Canada we as intermediates can race pro nationals in the MX2 because it is considered a "pro/am" class. I plan on racing the 5 eastern rounds in the MX2 pro class. 250 vs. 250.


Now for the set up.....


Picked up a brand new 2012 YZ 250 from Machine Racing


Sure does have an ugly stock exhaust system!!


I dropped it off at my engine builder D4 Performance and told him to build me a "250-f killer"
He sure built me one....





We tested different motor settings on the dyno and came up with an awesome setting. I made sure that i was able to run pump gas to save some coin until we do some more mods for the race season. The bike is currently spec'd for pump gas and pushes 54 HP.
The best setting we had was with 110 and we got great results.....
Stock Motor vs. D4 Modified Motor + Race Fuel

57.5 HP!

Surprisingly the best exhaust set up was the FMF factory fatty with the stock silencer. The stock silencer gave it more ponies and it revved out marginally further. The FMF titanium 2 is a short pipe and DOES have a much larger hit in the torque region.

Now as far as mods to the engine and carb go.... i have no idea what he did. I know how to twist the throttle and change the filter. But here is the list of bolt on parts we got for it:
- FMF factory fatty pipe
- FMF titanium 2 silencer
- Light speed disc cover
- Light speed glide plate
- Works connection radiator braces
- Works connection pro perch
- Sunline brake lever
- IMS wide pegs
- Excel Rims
- V4ORCE reeds
- Boyeson ignition and clutch cover
- Hinson clutch
- Some sort of over sized disc


Thought some of you two stroke fans would like a story like this! Hope you enjoyed! Hopefully i get some TV coverage with some massive holeshots!! ! .