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01yz426

Spark Arrestor

7 posts in this topic

I'm getting ready to ditch my STOCK '08 YZ450 (shorty exhaust ) and I'm opting for the Pro-Circuit w/spark arrestor.... My question is: How much power difference between the non-spark arrestor version and the one with a spark arrestor??? TI-4 GP System is the one I'm looking at...

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If the difference is simply the presence or absence of a spark arrestor, it should make no real difference at all. I can't notice any change on MY DRD 's with the sparky in or out.

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the spark arrestor really does not affect power, the one that does is the quiet insert, that can rob up to 15%hp

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I'm getting ready to ditch my STOCK '08 YZ450 (shorty exhaust ) and I'm opting for the Pro-Circuit w/spark arrestor.... My question is: How much power difference between the non-spark arrestor version and the one with a spark arrestor??? TI-4 GP System is the one I'm looking at...

i run that system.

if i take the spark arrestor out the bike is lauder. not sure if that means anything but you can hear a difference.

as for actual measuarable power, i can't tell. the 450 has more power then i need in most situations so as others have already said you wont be able to tell.

i like the quieter exhaust so i leave it in even on closed tracks when it's not required. it's not a pain to take in and out but i see no need to.

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Spark arrestor screens don't have any noticeable affect on power.

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Occasionally, a drop-in sparky will be made with quite a bit of overhang on the flange, reducing the outlet diameter of the muffler. The "quiet" insert/sparky combo for the old WB R4 pipes were like that. These will affect power more than sound, but very few makers build them like that anymore.

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