YZ Exhaust in the forest
Posted August 17, 2009 - 02:53 PM
I'm thinking of trying the Yamaha GYTR® Quiet Muffler One-Piece End Cap and Spark arrestor, for sound and compliance reasons.
Any one try these bolt on's, any power loss or delivery changes noted?
Posted August 17, 2009 - 03:59 PM
No loss in performance to speak of with the spark arrestor.
About same noise as stock too.
I had to add the silent insert to just pass 96db. Maybe a small power loss, seemed to smooth out the mid and add a little overev.
So with both parts it's a little pricey, about $150 all in but it works good.
If you're worried about looks mine completely disclored grey within a couple months. I don't know if this is common but I've heard of it happening to others.
Mine when new
Posted August 17, 2009 - 04:15 PM
How is bottom end torque over stock with this setup?
Posted August 17, 2009 - 05:02 PM
This WR450 feels like it's being held back, even with all the free mod's.
It's weird, it's like it stops revving at a certain point. My 05 KTM exc will pull any gear (except 1st) to the moon.