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Old 12-30-2010, 02:55 PM   #1
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BDX powervalve delete kit

Anyone have one of these kits on a 800? And what are the pros/cons and does it work??
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Old 12-31-2010, 07:16 PM   #2
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Sled: 2002 Mountain Cat 800 LE 151"
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BDX
pros:
- no complicated electrical over mechanical control system of computer > servo > cables > valves, to clean and maintain
- drops a little weight
- creates much needed space for turbo kit or aftermarket pipes
- lots cheaper than a replacement servo motor and cables

cons:
- its a stationary valve that does not vary exhaust flow with respect to rpm, so you will notice a performance loss with stock pipes, regardless of what they claim

STM
I installed Supreme Tool & Machine's power valve kit on my '02 800 a few years back after having bad cables and a toasted servo motor. Their kit lifts the valves according to exhaust pressure with a bellows (like Doo). It's a much simpler system than stock, and its tunable to open at desired rpm. Performance was just as good as stock through full range of rpm. I had some reliability issues due to the bellows retaining cap design being a little weak. Trying to get that sled going again this year so they're sending me parts from an updated design.
On a side note, the bellows housing is a little bigger than the stock valve housing so I don't know if it fits on the newer model chassis or with aftermarket pipes, but worth looking in to.
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Old 01-01-2011, 09:28 AM   #3
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Sled: 11 cf8le-T, 2012 m800
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06-07 Mileage: 2800
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I know the STM fits on the 8 & 1000 laydown motors with twins, but not sure about the older 8 if that's what you've got.

The negatives of the valve delete are greater as the motor gets smaller, as the bottom end loss is more obvious. I know people with 1200's with the deletes that like them, but fewer 1000's that do, and I don't know anyone with the 800 that likes them.

I've owned two sets, and don't have a "problem" with them, but would not recommend them unless you're a very serious weight watcher & are willing to compromise runnability for weight.
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2011 CF8 LE 141 Cutler stage II race gas turbo, powerclaw track, BD-X oil delete, Koso egt, Bparks light weight bushings, BD-X inner wheel kit, BD-X 2 wheel, BD-X anti-stab, BD-X 40" A arms with 19" floats
Wildchild T top post with 4-6" Rox adj riser, protaper bars, cycra handguards, pro design tether.
BR-tech Thrasher hood and venting.

And a throttle that points the RIGHT way, FORWARD!!!!

250++hp...and still quieter than a sled with a can!

2012 proclimb M800 snopro, BDX oil delete, CE 2.5 track, 38" arms, wildchild post mod, pro design tether, and a hot dogger (and of course, a forward throttle...)

PM me if you're looking for lightweight or diamond drive parts, I can get you discount pricing on BDX parts.
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