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It wouldn't win any road races nor any kart races where real hp shows it's effect.
The shim and bucket design imho had its day, but the finger follower system is superior and will find its way into all the bikes eventually.
I think the crf will drastically improve in low end power with a good piston, some pipe R&D to solve the two header massive flow area and decreased wave strength/Scavenging effect due to that.
Honda also usually leaves some on the table with tuning their first year, a GET will likely go a long way.
I'm still surprised the weight of the crf isn't noticed...to me weight is important! Same tire technology available on all the bikes... lighter one is going to stop quicker, turn sharper or faster for set traction level and accelerate quicker for a given hp. Obviously 10lbs isn't earth shattering when your boots, helmet, riding gear and extra lbs are at least 10lbs but on principle it's interesting the 10lbs can't be felt
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Cams will take up massive time for us... the Honda 450 head has amazing frame work and all you need to play with is port size for the cam and application it's used with.
The 250 appears a dead clone scaled down to me... so likely similar.
I'll have one on the dyno as soon as it shows up from Altus hopefully see if the low end has easy fixes..
On another note, do you think there'll be a power war eventually in the 450's like whats starting to happen in the 250's?
The manufacturers are learning how to mask the power via electronics, gear ratios, and inertia.
A modern 450 makes a 500 two stroke look slow in a 1/4 mile drag....and sadly some of our full blast 250f builds would make you scratch your head against a 500 too...
With more power the oems are just spreading the gearing out so you can shift less... making it not feel so fast but easier to ride and ultimately "faster" for laps.
If you want a "fire breathing dragon" drop a tooth up front and add 2 teeth out back. No other mods needed.
I also read comments on how one bike has x amount of peak HP and how that's better or lacking. Then watch the video, or simply watch at the track and see how many people are actually riding new bikes wide open AND within a 1000rpm or so of redline or at least at or above the peak torque. Anything less and you are not making (or using) peak HP. Is peak HP really a meaningful number to most riders?
This got me to thinking, when I read the newer tests, there seems to be more emphasis on making riding easier. Having electric start seems to carry as much weight as most other aspects. Shifting is almost treated like a burden. In most reviews I hear comments about how they had to shift at a particular portion of the track. That struck me as odd. I don't think anyone would have thought about that many moons ago. Not a criticism, just an observation on how perspectives have changed.
I would think a modern 250f would be easy to ride in comparison to the older versions & especially a 125 2T.
No doubt that the mx bikes have evolved & will continue to with the next phase being electric bikes.
I think riders coming off 125s would transition to this engine better than say someone coming off a 450, hand down because of where you want to be in the power.
Pit Row
https://thumpertalk.com/forums/topic/1245638-first-2018-shootout/
Second bike I'd recommend for your size would either be the Husky or KTM...
The Honda is more compact but does have the most similar powerband-feel to your 125 so that's a though as well...
One more question: is it worth buying a 2018 250sxf over a leftover 16? Are the small refinements worth the extra $?
(In europe the 2016 already had airforks)
If you can maybe have them come down on the 18 in price, you might have better resale value down the road?
Post a reply to: Forum QNA: 2018 Vital MX 250 Shootout