FMF 4.1 RCT

wolf918
Posts
155
Joined
2/13/2019
Location
Bulverde, TX US
5/20/2019 8:35am
I don’t know if this is where this question should be but I need some help. I have a 15 kx450 with the titanium megabomb headpipe and factory 4.1 rct muffler combination. I bought the bike with this exhaust and for the life of me I cannot get a quiet spark arrestor insert. Been back and forth with fmf for 6 months and every parts house out there keeps telling me there on backorder. Part# is 040639. I’m pulling my hair out now and cannot race (off-road) until I quiet this thing up. Any help would be greatly appreciated.

Mike
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kb228
Posts
6161
Joined
1/31/2018
Location
Mansfield, OH US
5/20/2019 9:42am
I dont know where you can get the part. But if its on backorder and unavailable right now and you want to race, might be worth looking for a different pipe. I dont know how loud yours is vs an oem pipe, but maybe a guy at an mx track would be stoked to trade you.
wolf918
Posts
155
Joined
2/13/2019
Location
Bulverde, TX US
5/20/2019 10:28am
kb228 wrote:
I dont know where you can get the part. But if its on backorder and unavailable right now and you want to race, might be worth...
I dont know where you can get the part. But if its on backorder and unavailable right now and you want to race, might be worth looking for a different pipe. I dont know how loud yours is vs an oem pipe, but maybe a guy at an mx track would be stoked to trade you.
Thanks I thought of that but anyone that’s interested so far has some pretty hammered stuff. It’s loud as hell, 113-114db. I’m pretty let down by fmf so far. Long time pro circuit guy.
fourfourone
Posts
2923
Joined
10/14/2017
Location
86oh, CT US
5/23/2019 6:17am
I have the same exhaust combo on my yz450. Even with the insert the exhaust is still super loud.

The Shop

Titan777
Posts
325
Joined
12/1/2018
Location
FL US
5/23/2019 5:59pm
I have the same exhaust combo on my yz450. Even with the insert the exhaust is still super loud.
That's good news for me, lol.
I only heared this pipe on YouTube and it sounded quiet compared to the stock. Glad to know it's a beast LaughingCool
fourfourone
Posts
2923
Joined
10/14/2017
Location
86oh, CT US
5/24/2019 5:58am
I like how it sounds but when I ride woods with my buddies, they all hate me. Sounds great going up a sandy hill pinned in 3rd
kbooth
Posts
35
Joined
12/8/2017
Location
Johns Island, SC US
5/24/2019 2:30pm
I think I have one for 2018 kxf that I am not using I will check when I get home
ebers
Posts
903
Joined
8/21/2008
Location
western, NY US
Fantasy
170th
6/3/2019 10:23pm
How much time is on it since it’s last been repacked?

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