nyroc's exhaust mod?
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#4
nyroc's exhaust mod?
People tell me that with bigger holes drilled, the performance is like an aftermarket exhaust, and it is quite loud. That is kinda hard to say, since most people that change their exhaust don't modify the stock one then compare it to aftermarket.
If money is not an issue, a real good Penland series might be a better idea.
With 6 3/8" holes, I got a modest power increase, and no louder than a stock prarie 400 or grizz 660 (I ride with them a lot, we did a sound comparison).
The sound tone is great. You will like it a lot. It is deep and growly, not poppy like the one bangers.
I don't like loud quads, and think that some loud machines are hurting us all by waking up sleeping old folks who complain, lobby, and possibly get trails closed and laws enacted. However, if you don't ride where anyone cares about noise, try drilling 7 5/8" holes, or removing all the baffles entirely.
This isn't USFS approved either. I advise against drilling any holes down the center (therefor only 6 holes), since that would be too easy for a ranger to poke a wire down the center and give you a citation.
I may eventually go dual exhaust.
If money is not an issue, a real good Penland series might be a better idea.
With 6 3/8" holes, I got a modest power increase, and no louder than a stock prarie 400 or grizz 660 (I ride with them a lot, we did a sound comparison).
The sound tone is great. You will like it a lot. It is deep and growly, not poppy like the one bangers.
I don't like loud quads, and think that some loud machines are hurting us all by waking up sleeping old folks who complain, lobby, and possibly get trails closed and laws enacted. However, if you don't ride where anyone cares about noise, try drilling 7 5/8" holes, or removing all the baffles entirely.
This isn't USFS approved either. I advise against drilling any holes down the center (therefor only 6 holes), since that would be too easy for a ranger to poke a wire down the center and give you a citation.
I may eventually go dual exhaust.
#5
nyroc's exhaust mod?
I did the exhaust mod and love it. I drilled seven 3/8 holes and made a new tip with a 2 1/4 outlet. Then I extended the muffler 3" with stainless to meke the tone a bit deeper. It is not very loud, about like my bud's Grizz, but sounds like my old ford 400M. With a K&N, snorkle(rad. hose) and rejetting, I noticed a difference, esp. on bottom. Before the P would wheelie sometimes and sometimes not. It had just the slightest hesitation off idle. But with the mods it will wheelie big even with a winch and a full front rack.
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#8
nyroc's exhaust mod?
I too use Nyroc's muffler mod with 12 1/2 in holes along the periphery with a 1/1/2 in hole for the centre of the cap this has given me a %9 hp gain along with other intake modds to a total of %15 hp gain. Making the Kawi breath is the biggest advantage you will have and with Nyrocs muffler mod the cheaper route. I have also used a FMF muffler although comparable does not have the sound characteristics of the muffler modded one. Just my penny and a half.
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