Reed spacer opinions

[Quinnlt4]

I was thinking about adding a reed spacer but was told it was not necessary with my VForce3 reeds. What are some of the benefits of a spacer?

[Deuce]

Honestly there are really no benefits to the reed spacers from what I've read.  Only real advantage to a spacer is if you need it to change the intake length due to clearance issues.

[Bigred]

Puts ur boot bavk farther to make the boot reach the carb lol.  Thats why ill be running one

[Rupp250]

My intake is actually cut down getting the carb closer to the cylinder. My builder did it.

[rsss396]

some times they help but for the most part do not do anything and are not needed unless it helps with fitment.
I think if you ran the shorter CR boot they would help make the airbox fit easier.

[christph]

Whether a reed spacer is worth it or not depends on your machine and setup.  I put a reed spacer on my Tri-Z and WOW, what a difference.  I think it was because the stock intake is small and interfered with the V-Force reeds and/or air flow.  Whatever it did I can't argue with the results.  I've used reed spacers on other machines with positive results, just not as noticeable.  If the stock intake was a good design to begin with you might not notice a big improvement.  You can only debate theory so much.  Some people dismiss them as a gimmick while others have reported good results.  The only way to know for sure is to test one on your particular machine.  Pro Design makes are really nice polished one for 30 bucks.  Oh yeah, they look cool too.  Here is the one on my Z:

[ATTACH=CONFIG]1262[/ATTACH]

[C-Leigh Racing]

Years ago I did do some testing, on some of my stuff & on some other riders quads.
What I found, say like you have a cylinder ported for the upper rpm ranges & it has that snap to it when it jumps on the pipe, that reed spacer will create more case volume & soften that hit jumping on the pipe just a small bit.
It take a rider with good feel though to tell the difference that it causes.
The spacers I used were the thick ones, like around 1/2 to 3/4" thick.

Another thing I found that will work on some engines, but not others. Theres a 38mm Keihin carb made for the 300EX Honda 4 poke that has an adapter made on to it, maybe like 2 extra inches of extention added to the intake side of the carb. You take that carb & mount it up on a fully modded national Yamaha Blaster engine & it will set that engine on fire. That carb by being longer, does like a ram effect to the intake charge & will up the HP a bit more.
Take that same carb & try to use it on a TRX or LT engine & you'll loose HP. That ram effect does not work on those engines.
We won a lot of races in the 200 air cooled class with that ol 300EX carb, course I had a good rider that could make it happen.
Like Eric Gorr said, Speed is 95% rider, 5% Horsepower.
Neil

[udontknowme]

i was gonna try a spacer on a 500 but never got around to it. was looking at a rad valve on a 500 one time and its right on the piston. 1/4" clearance if i recall. clogged the boyesen ports