I don't see 30,000 rpm in here!
No8 Wire Extraordinaire
I don't see 30,000 rpm in here!
Don't you look at my accountant.
He's the only one I've got.
Scooter boy
Pistons I made from Mahle forgings. You need a few special homemade tools to make them, but making them in house gives the freedom to optimize or change everything, be it shape or size. Piston rings were Kawasaki. Turned with diamond!
Low personal B.M.E.P.
I've posted this before - but hey, why not again....
Hardcore Biker
Just put this Husq/Cagiva cr 250 in my RD junior frame. It's such a nifty engine.
Forum whore
Where is your cat picture?😆Originally Posted by andreas
Hardcore Biker
Yes, how inconsiderate. I'll do better.
Low personal B.M.E.P.
Sorry Andreas but I thought the motor and bits looked a bit ratty...
Weekend cruiser
Not related to buckets, nor road racing in general but nevertheless important news for the future of two stroke racing : the UK sanctioning body just decided that in 2020 their national championship 250cc motocross will be opened for two stroke bikes !
It will be interesting, to see competition at top level between 250cc four strokes and 250cc two strokes. Finally...
Hardcore Biker
100 euro for it, besides it matches the rest neatly.Could use a new W?ssner of course.
Low personal B.M.E.P.
Good buying. You're seeing the benefits of a bigger population base. We don't see that sort of engine for that price here.
Pristine Knee Sliders
Are sure they will allow 250 2-strokes? I'd be very surprised if they don't have some massive capacity penalty.Not related to buckets, nor road racing in general but nevertheless important news for the future of two stroke racing : the UK sanctioning body just decided that in 2020 their national championship 250cc motocross will be opened for two stroke bikes !
It will be interesting, to see competition at top level between 250cc four strokes and 250cc two strokes. Finally...
Forum whore
the UK sanctioning body just decided that in 2020 their national championship 250cc motocross will be opened for two stroke bikes !.
It will be interesting, to see competition at top level between 250cc four strokes and 250cc two strokes. Finally...My thoughts too. Either that, or the 250cc foulstrokes will suffer a massive built-in power penalty.
Anorak
Years ago the AMA allowed the 250 2s to run with the 250 4ts in non experts and vetsMy thoughts too. Either that, or the 250cc foulstrokes will suffer a massive built-in power penalty
pretty sure NZ MNZ also allows the 250 2ts to run with the 250 4ts for one class anyway.
its likey been 10 years since a real new 250MX bike was made.
Kinky is using a feather. Perverted is using the whole chicken
Weekend cruiser
This seems to be serious :
source : https://motocrossactionmag.com/whats...-ready-for-it/The Maxxis ACU British Motocross Championship will lift the restriction on 250cc two-Strokes competing in the Maxxis MX2 class from 2020 onwards. The new rule will allow 120cc to 250cc for two-stroke engines and 175cc to 250cc four-stroke engines. The ACU Motocross Committee feels that with the increased costs of four-stroke machines it is imperative to keep the sport affordable for all. ACU Motocross Chairman and Maxxis Championship Race Director Steve McCauley said ?We feel the time is right to allow this?into the main British Championship. We firmly believe that we must try new ideas and progress the sport wherever possible we also believe that by making and announcing our decisions a long time in advance it gives everyone fair notice to plan accordingly.?
from the official website of the british championship :
source : http://www.mxgb.co.uk/article.php?id=1139From next season 250cc two-strokes will be eligible for the MX2 class of the Maxxis ACU British Motocross Championship supported by Pro Clean.
The rule change follows a landmark decision by the ACU Motocross Committee after a positive meeting with team managers at the Blaxhall round of the championship earlier this month.
The ACU has allowed 250 two-strokes to race in the MX2 class since 2018 with the exception of the Maxxis championship and the new ruling brings Britain?s main domestic series into line with many other countries including Holland, Canada and Australia.
Verde Substance KTM?s Brad Anderson, a two-time EMX300 champion who is currently contesting the Maxxis MX1 class on a 250cc two-stroke, welcomed the decision.
?It?s good news for all two-stroke riders,? he said, ?and I think you?ll get a lot more riders lining up. There?s definitely no advantage being on a 250 two-stroke against a 250 four-stroke ? when the four-strokes are tuned they?re powerful bikes. Maybe some tracks will suit a two-stroke more but on other tracks it will be better to be on a four-stroke
Weekend cruiser
KTM made a completely new engine in 2017, the first with a balancer. This engine is (in its enduro version) now totally dominating the enduro championships.
Look for instance at the latest entrylist of the famous Erzberg Enduro : more than 90% are two stroke engines. And a large part of those are KTM or husqvarna (same bike, different colours)
This prompted TM to rework their 250 engine, now they have also an internal balancer, plus a very compact electric starter. They also have an electronic powervalve.
But on the japanese front : nada... The yamaha 250yz is a 2006 engine. Suzuki, kawasaki and honda have nothing.
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