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IntakeHere is the best selection of powersport jet kits, reeds and performance intake parts.

DONAVAN in LA
Great item, you can feel the quicker throttle response, you no longer have to wait for the "powerband" or reed tips to open up
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Mike in FL
Makes adjusting the fuel mixture easy and quick. I highly suggest getting one if you put a Jet kit in. Also works on Raptor 350
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Steven in TX
Great reeds for the money. They did make a difference, but it feels like I will need to rejet to get the full effect. Also best price I have found on the internet.
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Adam in OR
This spacer enhanced the top end power of my bike and it was cheap.
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Brice in TX
These things made a huge difference on my '94 RM125. This bike rips. BRRRRAAAAAAPPPP
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JOHNNY in OK
I installed it according to the directions and brought to my mechanic shop to dial it in due to popping on decceleration and they could not get it to quit, the carb was jetted correctly and in good condition as well as the valves and the bike had no backfiring before, other than the "wide open throttle" type most 450's get when going extremly fast on a beach. My mechanic said he spoke with boyesen reps on the phone who told him to just send it back for the refund and it happens commonly. I was hoping this would help with hot-starting issues and really dissapointed now.
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