Any suggestions for what muffler would do good for this? I can't seem to find a lot of selection for a 420es Rancher.

 

I'm looking as well. Some manufacturers may have them fabricated or in development, but don't have them up on their web sites yet.

Could everybody list what they have found or purchased....

Thanks!

 

Allow me to demonstrate my newbness by asking.....why are you replacing the muffler on a new ATV?

 

Seems to me he's wanting more power from his quad so he's upgrading exhaust. I wonder if there's anything you could do to upgrade the fuel system on FI similar to what a jet kit would do for a carb?

 

<div class="FTQUOTE"><begin quote>Originally posted by: jsgreggAllow me to demonstrate my newbness by asking.....why are you replacing the muffler on a new ATV?</end quote></div>Stock exhaust systems tend to be all corked up, to meet sound and emissions standards. By increasing the amount of air going in and out of your engine, you can usually net a substantial increase in performance. Plus, stock setups tend to be rather heavy.

 

<div class="FTQUOTE"><begin quote>Originally posted by: silverado046.0I wonder if there's anything you could do to upgrade the fuel system on FI similar to what a jet kit would do for a carb?</end quote></div> I presume that after making mods, it will be best to remap the FI/ignition.

 

This is a hot little engine, so I am going to hold out for a high performance muffler.

FMF makes the PowerCore IV for the Rancher 350, so they should be coming out with one for the 420 any time. (Guess I need to call them and bug them about it!!!) I have had it on several sport quads in the past, and it's a nice high preformance unit!

http://www.fmfracing.com/produ...og.aspx?CategoryID=129

 

am pretty sure that HMF has what you are looking for......make both the exhaust and the optimizer for our bikes