Moto3 für 125GP, das war's dann ...

FIM declares Moto3 replacement for 125GP

The article says it has a 15700 redline, balance shaft, Ti rod, five gears
to drive the DOHC, FCR39 (the FIM is expected to ban EFI for "cost
reduction), cassette gearbox with alternates for all gears, optional dry
slipper clutch to replace a wet clutch and is said to be currently
delivering 45hp at 15400 on the dyno, with 27hp at 7700.

And so endeth the 2 stroke. Back in the 80's I never thought I would see
this day.
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Übersetzung:

FIM verkündet Moto3 Ablöse/Ersatz für die 125GP

Der Artikel besagt, Motor bei 15700 Umdrehungen roten Bereich, Ausgleichswelle, Titanium Pleuel, 5-Gang, DOHC-Kopf, FCR39 (von der FIM wird erwartet, dass elektr. Einspritzung zur Kostenreduktion verboten wird), Kassettengetriebe mit Ersatz für alle Gänge, optional Trockenkupplung mit Antihopping um Ölbadkupplung zu ersetzen and man erzählt sich, derzeit produziert er ~45PS bei 15400 Umdrehungen auf dem Prüfstand, mit ~27PS bei 7700 Umdrehungen.

Und so endet der 2-Takter. Damals in den 80gern hätte ich nie daran geglaubt, dass ich diesen Tag erleben würde.
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:shock: :shock: :shock:
Carsten (Aachen-Germany)

als Ergänzung, habe keine Zeit alles zu übersetzen, vielleicht 'mal jemand anderes, falls es bei jemandem Not tut:

____________________________________________________________

"I got a Cycle News today with a Cathcart article on this change for 2012.

http://www.bb-technology.ch/

http://www.bb-technology.ch/bbrtech.htm

shows a Moto3 engine that has motormounts to match the RS125 so
there will be plenty of existing chassis it can be run in right from the
start.

..."
__________________________
"..., there was also a long AC interview with Stefan Pierer, one of the
KTM owners and KTM appears to have the opinion that there's no
reason to not make both 2T and 4T engines.

Costs were addressed in the article though mostly for the off-road
sector::

"If you break down the maintenance costs, we know from factory racing
that since we changed to four-stroke engines, we have four times the
maintenance costs compared to our two-stroke days! The same is true
for the customer, and at the stage you have a 15K rpm 350, component
replacement is going to be even more frequent, which makes the two-
stroke still more attractive, especially for the younger rider. Not every
father can afford such a huge cost for maintenance, and anyway, he
may not have the mechanical capability to do it himself, whereas a so-
called simple two-stroke is easy to maintain."
"
--------------------------------
"The class is supposed to be open to prototype engines and chassis --
run what ya brung.

That is, until the FIM decides to screw that up a la Moto2.

The 250 4T will have the same bore limit as the MotoGP bikes at 81mm."
_______________________________
"KTM is the only company taking that view and 2 strokes will be dinosaurs in
no time, without a class to run in. The AMA has removed 2 strokes from their
MX world, the only place left to race them in a motorcycle is in off-road
racing such as hare scrambles and enduro.

I don't doubt his maintenance numbers, it costs maybe $200-$250 to do a 2
stroke top end and near $1000 with the four stroke if nothing is badly
messed up."
______________________________
"
I've just looked up the specs and I don't read German but it looks like the motor is a 250cc. It looks like it is 81x48.4 bore and stroke which is 250cc.

Now I have wiped away my tears, reached for my clutch pencil and started to make some more sketches for my bike.

If I have my figures right, this motor is not really so hot.
15700 - 45 Hp makes 149 BEMP
7700 - 27 makes 182 BEMP

My Honda is 18.5 at 11000 at the rear wheel, so say 20.5 at the motor.
This gives 161 BEMP for a 2 valve.

If I'm not mistaken, a 4 valve should be up in the 240 BEMP range."
_________________________________

Carsten (Aachen-Germany)

Bildquelle: http://www.bb-technology.ch/im…H/pic.right.front.1.B.jpg