Maintenance & Technical > KX500 Original

Does anybody have a stealthy flywheel weight

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WRXBRUMBY:
Compared to 4 stroke usability how is the power delivery. My last bike was a Husky 610 and it was like an armchair to ride. My mate bought it(long story...) and we ride together. Sometimes my kx500 brings me to tears how brutal it is on the rutted out hillclimbs. Then i hop back on the old husky and at the moment im way faster on that than the k5.

I feel the k5 will be an awesome machine for me in about 2 yrs when ive hardened up a bit, but at the moment i need to chill her out a bit. This weight seems the goods. Also the reed spacer. There are posts on here from guys that have done them all Reed sp, flywheel, and gnarly pipe.

is there anyone who has tested them individualy to see which one makes the biggest diff?

KXcam22:
WRX,
  Here is what I feel made the most difference listed from best to least (for single track woods riding).

1. Jetting
2. jetting
3. Gearing (not too low 14/48 for me)
4. Gnarly pipe
5. boysen dual stage reeds (or v force)
6. Reed spacer
7. FWW

As you can see I list the FWW as last.  My bike was so smooth after the mods that I didn't need the FWW.  I put one on only because I had run out of things to add to the trusty K5.  The FWW was a nice addition and did make a difference but not as much as I expected, compared to other 500's I had put one on. Keep in mind that jetting is NUMBER 1. Cam.

WRXBRUMBY:
i have a 165 main and have set it up as per the jetting chart for my eleveation and temps and as is i love the mid range power hit all the way to up top but its when it gets technical it gets a little scary. i think i did the mistake of trying the 13-50 gearing, its hurting when i get fatigued.

how do you jet it for smooth bottom end. bigger pilot(more fuel and bogging?) or smaller pilot(crisper but less fuel for less bang?)

does Gnarly pipe increase bottom end and rob up top?

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