Posts
7
Joined
3/13/2019
Location
Orting, WA, USA
Edited Date/Time
6/21/2020 12:04am
So I was reading on an Instagram comment (I know it’s not a reliable source that’s why I’m asking here) that in 2021 250’s will have a rule limiting them the 49 HP? I just thought it was weird I figured something like that would be already be in place in the rules. Does anyone have any info on that, I’m really curious now to ,one if that will be a rule change and how much horsepower are factory 250’s pulling if there is no limit currently.
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I seem to be in the minority on this but it has bugged me for years that some bikes are way more powerful.
This year in particular its been very obvious that the Star Bikes are faster and everyone knows it.
But why do we as fans want to watch racing where the bikes aren't equal 🤔
I dont think in any other form of racing this would be acceptable by the fans.
Then go watch bicycle racing.
This is motorsports. That's just how it is. For years PC Kawasaki had the best/fastest bikes. It's not something new.
It's not exclusive to SX/MX either. F1 has the same thing. Mercedes has had the best car ever since the new V6 era started.
Motorcycle racing is one of the last areas of motorsport where engines are not sealed and specified.
Racing is a contest between engineers well before the riders get involved.
Aftermarket businesses engine modifications and the associated work is a decent sized area of the sport and employs plenty of people.
It seems that no 450 is “slow” (at the “National” level, with “normal”/common mods).
Most “works” team tests seem to focus on power delivery, rather than the biggest numbers.
In the 250’s however, HP is king. Obvious advantage to the team doing the best with their engines. As noted above PC Kawasaki for many seasons. Currently Star Yamaha, especially at Altitude.
One of the unintended consequences is that the “stepping stone” class almost certainly costs significantly more for engines* than the premier class. If you want to be competitive.
Pretty sure “Engine wise”, a Stock 450 (even better with a remapped Vortex ECU to suit the riders preference.) would be enough for a solid finish. Same thing in the 250 class ensures terrible starts, and hard work all race, compared to the 50+ HP boys.
Can use all 50hp, can’t use all 60hp?
*Development and Maintenance.
Pit Row
There are 1 litre 4 cylinder road bikes- ie 250 cc per pot- that are tuned to over 200 hp which is 50 hp per cylinder.
Moto GP 4 cylinder 1000cc bikes are making around 300 hp so 75 hp per cylinder. A Cosworth engineer who worked on Dixon Kawasaki British Championship bikes said that they could get 80 hp from them given unlimited- ie F1 funding for development and a willingness to go over 20000rpm.
Some of the internal parts, things like valves and pistons and piston pins will likely be made out of substances most people have never heard of.
Optimizing air/fuel stream into the motor with some sacrifices to chassis design has worked well for Yamaha in the 250 class, but their 450 effort has been S.O.L. presumably for the same reason.
,which is what forums are for
I'm interested in the answer and l have to filter through your crap post fishing for likes
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