Maintenance & Technical > KX500 Original

All about reed spacers -

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don46:
At this point in my life (50) I enjoy riding the 250f, I don't get into much trouble, well at least to much. My son competes on a professional level in hillclimbs, I build bikes for him, and I want the most competitive that I can come up with. Like BDI and Stewart I have piles of parts that didn't prove out like I'd hoped, you keep plugging away and hope you hit on something. Like I've said I use the 250 carb on the nitrous bike and the Lectron on the gasser. Personally, for the riding we do, Reed spacers are not in the cards, WE want quick HP and all through the power band. I think spacers are great for trail riders, but wouldn't think they would be good for duners or anybody looking for all out HP. By the way we did use spacers on some of our 125's to pick up a bit of bottom end torque. At the end of the day, I think it depend s on the power curve your looking for, and as an individual you need to tailor it to your needs.

3Razors:
I ride wide open dunes and drags where top-end is really important.  I didnt want to run this spacer if it took anything off the top.  I had heard a rumor that the stock KX500 cage sticks too far in and pulling it out a little made more power everywhere, again just a rumor but I wanted to see if anyone on here can verify this.  Also which reed assembly gives more top-end power v-force or rad valve?

kaw rider:
stock cage= spacer
v-2,3 no spacer

BDI:
If a guy really wanted to make his kx500 have more power on the bottom and be more like a tractor and did not care about sacrificing a little top end what I would do is weld in the bottom corners of the main exhaust port and make it smaller and then bore and  replate the cylinder. Take the main exhaust port from being a big square and make it more like a upside down triangle. If you did this you would turn the bike into a billy goat for sure. It would have low end like a harley.

3Razors:
I agree BDI, good info there.  My KX5 is pretty modified ie porting, head rechambered, NOS nitrous, and pvl ignition.  The idea of the reed spacer has been tooling around in my mind but never did use it because I didnt want to loose any top-end.  I've been debating between the V-Force and Rad Valve cages and by all the replies using the search sounds like the v-force is the way to go.  I have been using stock for the longest time and have been happy with them but I like to tinker for more hp but at the same time I really despise spending money on a product that doesn't perform the way I am hoping.

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