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YZ250FX muffler options, need spark arrestor.

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I just bought a lightly used YZ250FX that still has the stock muffler on it.

 

I need a spark arrestor to ride on the local trails.  I understand that the stock muffler doesn't have one ?

 

FMF makes several models of muffler for the YZ250FX.  I can't figure out which one to get.   What is the difference between the Q4 and the 4.1 ?

 

How much difference does an FMF muffler make power wise ?

 

How much weight difference is there between the stock muffler and an FMF ?

 

Thanks.

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I just bought a lightly used YZ250FX that still has the stock muffler on it.

 

I need a spark arrestor to ride on the local trails.  I understand that the stock muffler doesn't have one ?

 

FMF makes several models of muffler for the YZ250FX.  I can't figure out which one to get.   What is the difference between the Q4 and the 4.1 ?

 

How much difference does an FMF muffler make power wise ?

 

How much weight difference is there between the stock muffler and an FMF ?

 

Thanks.

The stock muffler makes great power, just knock out that internal diverter which is tacked inside the core and you'll have the same thing that comes on a YZ, the aftermarket mufflers will save a bit of weight and some will be quieter but none of them are going to make a noticeable difference in power production over stock save your money and add a Pro Moto Billet end cap with removable sparky insert.

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PMB end cap, with the baffle out the stocker works great.

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I just bought a lightly used YZ250FX that still has the stock muffler on it.

 

I need a spark arrestor to ride on the local trails.  I understand that the stock muffler doesn't have one ?

 

FMF makes several models of muffler for the YZ250FX.  I can't figure out which one to get.   What is the difference between the Q4 and the 4.1 ?

 

How much difference does an FMF muffler make power wise ?

 

How much weight difference is there between the stock muffler and an FMF ?

 

Thanks.

Have you ridden the bike yet? They feel like a mountain bike in the single trails compared to a 450..

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Have you ridden the bike yet? They feel like a mountain bike in the single trails compared to a 450..

 

As a matter of fact, I rode it for about 30 minutes on single track prior to buying it.  Yes, it is nimble.

 

I picked it up last night.

Edited by MidlifeCrisisGuy

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