[ocliff4]

I have a 06 450x,I just opened the air box and removed
the baffel from the muffler,went out riding the bike runs
great except for when I open the throttle too quick it
bogs out or stalls.it runs fantastic in the high rpm range.
do I need to change jets if so which one would be the best??

[nedirtbikr]

I have a 06 450x,I just opened the air box and removed
the baffel from the muffler,went out riding the bike runs
great except for when I open the throttle too quick it
bogs out or stalls.it runs fantastic in the high rpm range.
do I need to change jets if so which one would be the best??

Take a look at the JD Kit. A lot of the X owners use them and love 'em. I use it myself and am very happy. There are some other mods you can do too (pink wire, fuel screw, updgraded air filter, quickshot, etc.) Do a search...there is a ton of info on those things here. I'll look for some links.

[dlpmx]

If you opened the air box and didn't rejet your too lean.

Dale

[Crf250girl]

http://www.geocities.com/catpoopman/sv650_rejet.html

I don't have a X or a 450 but my bike did the same thing and my dads buddy thats a Ford mechanic told us how to do this, read on this website, hopefully it'll help.

[dlpmx]

Good web site but way harder. Loosen the carb clamps, rotate the carb. Remove the float bowl drain. The main sits right there. Most guys here will tell you to buy a JD kit. I will also . Makes things a lot simpler.

Dale

[[email protected]]

do I need to change jets if so which one would be the best??

Oh yes, then it will run fantastic everywhere, you're going to be a very happy owner when you get 'er done !
Here you go,this is what dplmx is talking about,and in that one box is the answer to your problems. Just follow the directions, it's very straightforward and easy. You'll love how your bike runs :
http://www.crfsonly.com/catalog/product ... ts_id/1093?
This will help you learn your way around the carb,print it,read it,keep it :
http://crfsonly.com/howto/450x/jetting/ ... needle.php
Doug

[ocliff4]

thanks for all the tips,ill give it a try!!!!

[JAWS]

While you are doing your jetting, and if you get the JD kit, do the o-ring AP mod at the same time. It is the best bang for the buck for the throttle-snap bog, after getting the jetting right.

Joe

[ocliff4]

can you explain the o-ring mod???thx..

[JAWS]

If you get the JD kit, it comes with it. Basically you install a small rubber o-ring over the accelerator pump actuating arm that will change the timing of that event. There is a delay gap built in and the o-ring will affect that gap timing.
Here's a little light reading:

http://crfsonly.com/forum/viewtopic.php ... ight=oring
Joe