Posts
2075
Joined
3/18/2017
Location
Boston, MA
US
Edited Date/Time
9/16/2018 9:57pm
In putting their twin exhausts on the 250f their reasoning in the description said that since they couldnt go out the front of the engine because the frame was in the way they did dual exhausts for the best flow. Ktm/husky have been doing this but they have steel frames. Suzukis 19’ 250 just changed the frame to allow a center port exhaust. Why couldnt Honda just do this vs two entire exhausts. Also why cant Suzukis 450 do this? Or Honda or Kawi... Or anybody else besides yamaha with the reversed exhaust? It seems so simple yet it took until 2019 for Suzuki to do it first on an aluminum framed 250f. Honda was able to do this all the way back on their aluminum framed 2 strokes mind you. Am I missing something here? A side port is never the best flowing so are they just saving this as a future upgrade. Always gotta have potential changes ready so theres something new to add in the future.
Something I just noticed is that yamaha, having no frame in the way, has essentially made an “updraft” exhaust on the 19’. The exhaust port now comes out at an upward angle after going up past the valve, so it doesnt have to turn so much to meet a flat or downward exhaust port. Pretty cool since they dont have the frame in the way.
The Shop
And yes, I need a new sticker for mine.
I was told the center port design was a much better motor.
2 is NOT better than 1
2 is NOT quieter than 1
2 DOESN’T make it handle better
What it is:
It’s MORE EXPENSIVE
It’s Smoke & Mirrors
Pit Row
That FMF can looks terrible so I see why they go for 2 smaller ones. Also I know mfg’s will wait for other mfg’s to do something until they do it so they have potential changes waiting and they dont run out of things to do. Like the e-start. I definitely expect this to come down the line though absolutely no reason to leave hp on the table especially with 250s. I wonder how much more hp the suzuki has too. Yamaha went further and made an upward exiting exhaust port so it doesnt have to turn as much after the valve. Mirroring the downdraft intake, idk if forward facing exhausts could do this though, but theres a lot of new tech.
Heres the corner exhaust has to make
If a single could still do this it would be perfect
They seem to sell just fine so maybe those buying do not give a damn? Personally I love the design on my 450 (which makes the most HP of any 450 by the way), the mufflers are tucked out of the way, I never damage them unlike those massive singles, it looks cool and I like the weight more centralised ...just my opinion (not asking you to agree with it)
I just wonder why the radical new engine wasnt even better than the old engine the first year. They say more low-mid now for 19’ so thats good if true. Probably because it was the first year, but it was just an all top end motor with lots of over rev, but missing a tonn of low end and mid.
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