FIM Moto3 Technical Specs Released

For those of you interested in technical bits, here is the latest issued by the FIM regarding the Moto3 class that will be replacing the 125cc in 2012


FIM Road Racing World Championship Grand Prix
Decision of the Grand Prix Commission

MOTO3 REGULATIONS
Engine
- 4-stroke reciprocating piston engines only.
- Engine capacity: maximum 250cc.
- Single cylinder only.
- Maximum bore size: 81mm. No oval pistons.
- Engines must be normally aspirated. No turbo-charging, no super-charging.
- Crankshaft speed limited to maximum: 14,000 rpm.*
- Maximum of 1 ignition driver.*
- Maximum of 4 valves.
- Pneumatic and/or hydraulic valve systems are not permitted.
- Valves timing system drive must be by chain.
- Variable valve timing and/or variable valve opening systems are not permitted.

Engine Supply
- The engine is defined as the complete engine including intake system (throttle body, injectors),
and one complete transmission.
- The maximum price of the engine must not exceed 12,000 Euro. No optional parts or service contracts may be used to circumvent this price limit.
- Each engine manufacturer must undertake to supply sufficient engines and spare parts to supply minimum 15 riders per season, if requested.
- Each engine manufacturer must submit a spare parts price and lead-time list for the season for approval by the Organiser, and may not charge more than these published prices. Approval is
based on the prices and lead-times being in line with current market norms for these parts and technologies.
- In the event of engine updates or upgraded parts being developed, these must be made available to all customers at the same time, and respecting the price limits described above.

Inlet & Fuel System
- Variable-length inlet tract systems are not permitted.
- Only one throttle control valve is permitted, which must be controlled exclusively by mechanical means (eg. cable) operated by the rider only. No other moving devices (except injectors) are
permitted in the inlet tract before the engine intake valve. No interruption of the mechanical connection between the rider’s input and the throttle is allowed.
- Idle speed adjustment by means of an air bypass system, controlled by the ECU is allowed.*
- Fuel injectors must be located upstream of the engine intake valves.
- Maximum of 2 fuel injectors and 2 independent fuel injector drivers.*
- Fuel pressure must not exceed 5.0 bar.
- Other than engine sump breather gases, only air or air/fuel mixture is permitted in the inlet tract and combustion chamber.
- Fuel must comply with the FIM “Moto3” specification (tba).

Exhaust system
- Variable length exhaust systems are not permitted.
- Noise limit will be a maximum of 115 dB/A, measured in a static test.
- No moving parts (e.g. valves, baffles…) are allowed in the exhaust system.

Transmission
- A maximum of 6 gearbox speeds is permitted.
- A maximum of 2 alternate gear ratios for each gearbox speed, and 2 alternate ratios for the primary drive gear is permitted. Teams will be required to declare the gearbox ratios for each gear used at the beginning of the season.
- Electro-mechanical or electro-hydraulic clutch actuating systems are not permitted.

Ignition, Electronics & Data-Logging
- Only the ignition/fuel injection control units (ECU) approved by the series Organiser are allowed.
This ECU must remain unmodified in hardware and software, as delivered by the Organiser.
The only permitted changes are the setting (tuning) options included in the software.
The Technical Director may require the team to change the ECU on any machine for another standard one at any time.
- This official ECU will include an engine rpm limiter.
- Only the standard Data Logger system approved by the series Organiser may be used.
* All the parameters identified by this symbol are set/controlled via the above mentioned ECU.

Chassis
- Chassis must be a prototype, the design and construction of which is free within the constraints of the FIM Grand Prix Technical Regulations.
- Minimum total weight of Motorcycle + Rider: 148kg
- Brake discs must be made from an iron-based alloy.
- Suspension systems must be of a conventional passive, mechanical type. Active and semi-active suspension systems and/or electronic control of any aspect of the suspension and ride height is not permitted. Springing must be by means of coil springs made of Iron-based alloys.

Wheels & Tyres
- The only materials allowed for the wheels rims are Mg and Al alloys.
- The only permitted wheel rim sizes are:
Front, 2.50” x 17”
Rear, 3.50” x 17”
- The number and specification of tyres allocated to each rider per event will be controlled.
- Only tyres from the Official Supplier may be used.

Materials & Construction
- Construction materials must comply with Article 2.7.10 of the FIM Grand Prix regulations.
- Camshafts, crankshafts, piston pins must be made from Iron-based alloys.
- Engine crankcases, cylinder blocks and cylinder heads must be made from cast aluminium alloys.
- Pistons must be made from an aluminium alloy.
- Connecting rods, valves and valve springs must be made from either Iron-based or Titanium-based alloys.

Definitions:
“X-based alloy” means the element X (e.g. Fe, for iron-based alloy) must be the most abundant element in the alloy, on a % w/w basis.

General
Number of machines: the team can scrutineer only one motorcycle per rider.

Number of engines: a maximum of 8 engines per rider may be used during all Grand Prix race events comprising the season. A rebuilt engine will be counted as a new engine.

Teams will be required to register engines at Technical Control on the day before the first practice at each event. Such registered engines will be sealed (excluding cam cover, transmission if applicable) and seals may not be removed except under supervision of the Technical Director.

Only sealed and registered engines may be used on track at Grand Prix race events. An engine presented for Technical Control without intact seals will be counted as a new engine.

Apart from the above regulations, all other construction criteria, dimensions and specifications are as per the FIM Grand Prix Regulations.

Be Sociable, Share!
  • Jagjakob

    Like a moped engine but the price seams to be neat. And the racing with 40 more or less mad drivers fighting for the first corner looks exiting.

  • Jagjakob

    Like a moped engine but the price seams to be neat. And the racing with 40 more or less mad drivers fighting for the first corner looks exiting.

  • http://www.ittflowcontrol.com/midland-acs Hydraulic Valves Types

    The Permanent Bureau of the FIM Road Racing World Championship Grand Prix, composed of Messrs Vito Ippolito, FIM President, and Carmelo Ezpeleta, Chief Executive Officer of Dorna Sports, met on Wednesday 9 March 2011 in Zaragoza, Spain, and, based upon the analysis being carried out by the Technical Director and the Director of Technology on the different options and proposals received, took the unanimous decision to nominate the company Dell’Orto as the single ECU supplier for the Moto3 class from the 2012 season until the 2014 season.

  • Rocket Rex

    FYI-BACK IN 1964 HONDA HAD A RC 146 125cc TWIN THAT COULD REV TO OVER 19,000 [RPMs] WITH A 8 SP
    GEARBOX ! DONT EVEN GET ME STARTED ABOUT THE ICONIC [OVAL PISTON CONCEPT] THAT HRC HAS
    BEEN PERFECTING EVER SINCE ! I HAVE NOT BOUGHT A NEW HONDA IN OVER 25 YEARS ! LOOKS LIKE
    MY GOLDEN 1969 CB-750 WILL JUST HAVE TO KEEP ME SATISFIED A LITTLE LONGER ! THESE RULES ARE
    JUST PLAIN RETARDED IN MY HUMBLE OPINION !!!  [ROCKET-REX OUT].

  • http://www.kneedraggers.com/ motorcycle accessories

    Hello,
    It is the breaking news. FIM is famous and most usable brand
    of the bike in the whole world. The FIM motorbike have the great
    features,look and accessories.. It's a nice offer , I look forward for
    it…

  • D4stringer

    looks like street legal on track..nice tosee…

  • Derek Sloan

    How about diagonally opposed inlet and exhaust valves ? Developed many years ago and giving higher outputs ? Does anyone at the FIM read any of this ? ?

  • Alarms

    What a crap spec my nsr 250 will beat them such a backwards step by fim

  • Tashaz

    As a development class I think this is a great step forward and encourages race craft instead of monetary might. MotoGP is and should be at the cutting edge so expense in the development classes syphons funds from it. As an engine builder I think these rules make great sense.

  • http://www.coghlincompanies.com/ Martina Petrus

    Great specs! I wish I could own such a car.