KDX220R head mod from RB Designs .. before and after

Questions and Answers about the best carb and Head mods available for the KDX.
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Suzy America
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Country: USA

KDX220R head mod from RB Designs .. before and after

Post by Suzy America » 01:14 pm Apr 13 2019

In case anyone is curious, yes this is a fine stand-alone mod to do to your bike.
Here's some before-and-after shot on the same bike, the same stretch of forest road, on two different days.
It pulls better across the band, and the RPM ceiling is a little higher. The power hit comes on harder too which was fun.


In between videos the color scheme was changed a bit .. the white shrouds were replaced with green ones, the tank was painted black, and the handguards are wearing yellow plastics.

Next mod up is the Lectron 36HV carb which should be here by Weds.
99 KDX220R w/RB Designs head, Lectron 36HV carb, FMF Fatty + ?Turbincore

treelimb
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Re: KDX220R head mod from RB Designs .. before and after

Post by treelimb » 05:36 am Apr 14 2019

wow. I can hear the difference. NICE video. thanks. I personally appreciate no music being in your video if for no other reason than I appreciate no music being in a dirt bike video. Music just makes the dirt bike video no longer a dirt bike video. The sound of a crisp running 2 stroke is music enough.THANK YOU!

Suzy America
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Country: USA

Re: KDX220R head mod from RB Designs .. before and after

Post by Suzy America » 09:26 am Apr 14 2019

That mod got me into a little trouble here & there .. a couple times I went into corners a little too hot and had to chew up the turf to recover it. And from watching the rearview cam, I can see where the powerband hits, because the back wheel spins and starts chewing things up.

Loving this KDX experience so far .. can't wait to take it out to Tillamook State Forest :)
99 KDX220R w/RB Designs head, Lectron 36HV carb, FMF Fatty + ?Turbincore

GATOROC
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Re: KDX220R head mod from RB Designs .. before and after

Post by GATOROC » 11:10 pm Apr 17 2019

Thanks for showing the comparison - sounds like a pretty noticeable difference. Now I'm contemplating getting the head mod done even if I have to wait a few more weeks to get my bike back together. Ron won't be back from vacation until 4/29, but it will probably be worth the wait.
2000 KDX 220

jjavaman
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Re: KDX220R head mod from RB Designs .. before and after

Post by jjavaman » 09:29 pm Apr 19 2019

Well worth it!
97-220 with a PC pipe. 2015- RB carb and head mod

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