Why does my bike bog at high rpm?
Causes of Bogging and Possible Solutions The most common reason is that your air/fuel mixture is inefficient or dirty. If your air filter is clogged or has a lot of dirt. It could be bogging down the engine. Consider cleaning the air filter or replacing it with an air kit to see if the problem is resolved.
How do you tell a lean bog from a rich bog?
But just for reference (for those who haven’t experienced both) a lean bog is a hollow “BOOOOGGGGGGGG” sound. A rich bog is a sputter stutter.
What makes a 2009 Yamaha YZ450F so good?
Straight off, the 2009 Yamaha YZ450F impresses due to an unmatched combination of linear power delivery and chassis stability making it easy for almost every motocross rider to get accustomed with the bike within a few lap times and not that much dirt spread. The bike has a natural evolution.
What should the idle speed be on a YZ250F?
Gently turn the screw all the way in. Now back it out two turns. Start the bike and fully warm it up, go for a 10 minute ride. Set the idle to speed to 1,500~1,800 RPM as best you can (I know, without a tach this is tough, just set it to were it idles relatively smoothly).
What was the engine displacement of the Yamaha YZ400F?
Two years later (in 2000), the YZ400F had its engine displacement increased to 426cc, something that made all the difference when you would widely open the throttle and expect it to go like a train. One of the smartest moves that Yamaha had made with this bike is the fact that in 2001 it had titanium valves replacing the steel ones.
What do I do when my YZ250F bogs up?
Open the fuel screw slightly and lower the idle speed. To deal with the bog, only tweak the AP timing screw it if it bogs during actual riding. If you just blip from idle standing in your drive way, that is no test. when i first start it it idles fine. when i get it to rev is when the idle climes and does not come back down.