woodsguy
Ride Red
- Joined
- Aug 15, 2006
- Messages
- 21,344
- Reaction score
- 12,445
- Location
- Huntsville
- First Name
- Rob
- Last Name
- Vaughan
Click on the OP's thumbnail, you can see the rearward slant of the engine. You don't see that everyday.
"The revolutionary, rearward slanted, high-performance liquid-cooled, 4-stroke, 4-valve, fuel-injected engine has been tuned to challenge for race victories in the very competitive GNCC and Hare Scrambles race series.
"The position of the engine moves the rotational mass of the cams towards the center of the bike which allows for a straight shot, down draft intake and straight exhaust port for ultimate performance. This keeps air box up high, out of dust and mud/water."
I too wish for a YZ 250X two stroke. Not really excited about the expensive maintainaince of four strokes.
Myth. Yamaha four stokes are pretty much bullet proof.
Myth. Yamaha four stokes are pretty much bullet proof.
Agreed!
Good to know. Not a major bone to pick but do they tend to go through the stock Titanium valves fairly quickly like the Hondas do? However once they go I know you can replace with the stainless valves for not much money and then basically forget about them.
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Good to know. Not a major bone to pick but do they tend to go through the stock Titanium valves fairly quickly like the Hondas do? However once they go I know you can replace with the stainless valves for not much money and then basically forget about them.
Is this also the design with the intake on the front of the head and the exhaust on the back with a wrap around header?
Is this also the design with the intake on the front of the head and the exhaust on the back with a wrap around header?
Bike with stainless valves are slower.
My old CRF went from 54 RWHP at 10,500 to 52 RWHP at 10,300 when the ti valves had to be replaced with SS. I couldn't tell the difference. Heck that little difference could be explained from one dyno run to the next by any number of variables.