Bogging in whoops



6 replies to this topic
  • Mxer303

Posted June 10, 2001 - 05:55 PM

#1

I was practicing today, and when I would enter the whoop section, my bike(00 426) would bog as I applied the throttle to clear 2 or 3 at a time. I have the 45 pilot and 168 main installed, does the fuel screw need to turned out a little? The whoops are the only place it bogs, it doesn't do it coming out of turns or anywhere else.

  • MikeOK

Posted June 10, 2001 - 06:10 PM

#2

check your float height, they may be getting a little sticky...

  • Boit

Posted June 10, 2001 - 08:51 PM

#3

Also, check your vent hoses. If you haven't already, take a pair of scissors and cut the ends at about a 45degree angle. This helps to keep mud from plugging the ends and causing the symptom you describe. Check each hose from the carb all the way down to the bottom and make sure none are kinked.

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • sirthumpalot

Posted June 11, 2001 - 12:55 PM

#4

Just to add to the vent hose idea, on my 2001 426 the bottom about 2" or so of each vent hose is split in half. I don't know if this offers an advantage over cutting at an angle..?..

  • Shawbridge Husky

Posted June 11, 2001 - 01:11 PM

#5

Anyone mention the accel. pump? They get filled with crud easily.

  • Boit

Posted June 11, 2001 - 01:59 PM

#6

Yep, the accelerator pump could be contributing to the bog. A #168 main jet seems abnormally rich to me. Is there any reason why you are running such a rich main for the '00? Now that we are getting into summer temperatures, you might want to experiment with going leaner on your main jet. I'm using a #158 with C-12 fuel. A #160 makes it blubber a little on top. The #158 gives really crisp throttle response right off idle and it revs cleanly all the way to the rev limiter...if I let it go that high.

  • Mxer303

Posted June 12, 2001 - 08:24 PM

#7

I meant 165 main. I'll clean the carb tomorrow and see if that helps.

[This message has been edite





Related Content

Forums
Photo
Supercross

Wilson the Blue Privateer by jetfuel


Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  50 replies
Forums
Photo

05 yz450f not fast enough by RedeyeYZ


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • Hot  38 replies
Forums
Photo

James Stewart back on a YZ450F by YamaLink


Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  47 replies
Forums
Photo

Megabomb Fitment by 288yz450


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 1 reply
Forums
Photo

YZ450FX OR YZ450F by MESSMAKER


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • Hot  30 replies
 
x

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.