Have 4 Stroke Exhaust Resonance Chambers Jumped the Shark?

Brent
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Brent 12/24/2020 5:19pm
12/24/2020 5:19pm Edited Date/Time 12/24/2020 5:44pm
berm surfer wrote:
Haha, have any of yall actually ridden the bike?? Discrediting an experienced test rider, someone who has had a career working for a manufacture testing bikes...
Haha, have any of yall actually ridden the bike?? Discrediting an experienced test rider, someone who has had a career working for a manufacture testing bikes just for the hell of it?? Cool story
I had an opportunity to ride a new, bone stock 2021 Gas Gas MC450, although for only 4 laps on a hard sand track Cahuilla Creek MX) last week.

I own a 2021 KTM 450SXF with an FMF 4.1 system installed and an aftermarket air filter cage with no backfire screen.

It's hard to compare Apples to Apples because there was no map switch on the Gas Gas, but if you compare map 1 in the KTM to the standard Gas Gas Map setting, they feel roughly the same out of the corner to me.

BUT - If you switch to Map 2 on the KTM it blows away the Gas Gas in low RPM acceleration out of turns with the FMF exhaust.

But that's just my opinion based on riding at one track. Kris Keefer is an experienced test rider for sure, but he is also just one tester with an opinion.
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Chance1216
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Chance1216 12/24/2020 6:54pm
12/24/2020 6:54pm

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queen of spodes 12/25/2020 10:10am
12/25/2020 10:10am
Lastander wrote:
How about paying 1300$ for a stainless Yosh that weighs more than stock, cracks everywhere after about 30-40 hours, sounds 2-3db louder and basically gives no...
How about paying 1300$ for a stainless Yosh that weighs more than stock, cracks everywhere after about 30-40 hours, sounds 2-3db louder and basically gives no added performance? Probably sounds great to me because i have 4 of them laying around now
Why did you keep buying them if they are worse in every possible way?
queen of spodes 12/25/2020 10:11am
12/25/2020 10:11am
nickm wrote:
Life lesson: the price of an item has very little to do with raw material costs. It is priced to what buyers think its worth and...
Life lesson: the price of an item has very little to do with raw material costs. It is priced to what buyers think its worth and what they will pay. Why would anyone sell something for $200 bucks when they can sell it all day for a grand?
Probably because they are proud of their work and want to provide excellent value to the consumer.
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numbers
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numbers 12/25/2020 10:15am
12/25/2020 10:15am
TeamGreen wrote:
There’s a forum member named “Tuned Length” that should have the real answers...
Its all about the harmonic pulse. Talk to that guy and he will tell you everything 😁
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mooch
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mooch 12/25/2020 11:10am
12/25/2020 11:10am
TeamGreen wrote:
There’s a forum member named “Tuned Length” that should have the real answers...
tunedlength wrote:


I cant believe how young I looked back then!
Merry Christmas everyone.
Tuned length...is that really you? Entertaining and educational videos on that channel...I subscribed after watching this one.
TeamGreen
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TeamGreen 12/25/2020 11:33am
12/25/2020 11:33am
So, it's all about the variations in pulses?
MohMoto14
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MohMoto14 12/25/2020 9:25pm
12/25/2020 9:25pm
TeamGreen wrote:
So, it's all about the variations in pulses?
Me 2 one of the most interesting vids ive seen in a long time so Ill be watching the rest most likely in one sitting.
Then ill come here and snicker as i read endless comments from people who make ignorant claims with pure confidence. I love vitards.
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Dirty Points 1/2/2021 1:15pm
1/2/2021 1:15pm Edited Date/Time 1/2/2021 1:19pm
Dirt Bike Magazine has now posted Dyno numbers for the 2021 450s.
https://dirtbikemagazine.com/450-mx-bikes-on-the-dyno-wrappy-new-year/

The KTM ends up with a very similar lower rpm torque curve to the Gas Gas, but the orange bike opens up significantly on top with 2 more peak HP above 6500 rpm.




inthebadboycorner 1/2/2021 1:27pm
1/2/2021 1:27pm
Good old Julius, most of us oldies watched him a bit, there was not much else on TV back in the day.

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