I was messing around today in my garage and started to look at my stock muffler. After taking apart I pulled out the huge core and spark arrestor. I ran the muffler open and noticed it had a stronger pull accept for maybe alittle jetting problems (bogs) 27 degrees out . So I was wondering if any one has dynoed a stock muffler with the S/A out of it. I bet we would be supprised at the gains that are available from the stock pipe just by opening it up. Give me some feed back. I wish I had someone else to run against to see if its making more power or a dyno.

 

On the dyno by just taking out the core you gain 3 hp for the bogginess you can just play around with the needle

 

go to www.gtthunder.com a dude breaks everything down on the dyno sa out lid off etc just pick yfz thn more yfz info let me know what you think

 

Thats pretty sweet but did you look at the trx? It shows it making more power and being quicker. I have not had one trx beat me usually I pull them alittle bit. Not by much but 9 times out of 10 I am ahead. I also noticed how much the jetting is important on these quads. I cant wait to get my digatron guages back to jet this bike better. Do you know what pipe he used for this test?