Quieter Q4 solution!

iFlyLow wrote:

Anyone else do this to the Q4 and feel that it made a big difference?

I installed a Q4 and power bomb 2 weeks ago and it is way too loud but im liking the performance. This may be a great solution if it actually makes it a bit quieter. I noticed after an hour ride through the canyons my ears feel like i just came out of a banging night club.

I have 2 of the 040630 inserts that I had bought for an adventure bike of mine that turned out not to need them. I was thinking of doing the modifications to shorten one of these inserts to further quiet down the Q4 on my WRR. If you are interested in one of them, I can modify both.
Let me know. It would motivate me to finally do this versus having the inserts sitting on the shelf.

i would be, i would like to keep the spark arrestor functional instead of chopping it like the guys above did. Maybe cutting the netting shorter and soldering/welding it back shut again so its cleaner. what did you have in mind?

msged you.

I wanted to make my q4 quieter so I did this to the baffle.




I basicly copied the hindle quiet core design I bought for a hindle pipe I had on another bike.

I cut out the sa screen as we dont need them in canada and I dont want to have to remove and clean it once and awhile. If your some wheres you do need one you can do this and leave it alone.

I welded a washer over the end of the baffle then drilled the center of the washer out to 3/4 of an inch, then I drilled 8 3/8 holes in the sides of the baffle as some exhaust flows around it, this helps flow without adding more noise.

Its quite a bit quieter and the bike bikes seams to run exactly the same.

Gundy wrote:

http://www.kawasakiforums.com/forum/klx-250s-71/pictorial-custom-fmf-q4-quiet-stock-35239/
http://www.kawasakiforums.com/forum/klx-250s-71/fmf-q4-how-make-quiet-stock-35221/

Poster claims that the powercore quiet insert will further quiet down a Q4.   Anyone tried this on a WR?

Thanks for the info Gundy bought the quiet insert trimmed the spark arrester so much quieter & no loss of performance...your a star..