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Old 2011.07.09, 05:40 PM   #1
arch2b
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Kyosho Stock Class Racing

Why Kyosho Stock? All of us started somewhere. For many of us, this was LONG ago when Mini-Z racing was in the early stages of being formally organized via the then Kyosho Mini-Z Cup and similar sponsored events. HFAY for example has it's roots in nearly stock class racing with the Kyosho box stock motor. Over time HFAY, like other series, has evolved and focuses mainly on modified stock and open/mod racing leaving little to no support for the beginner classes. We want to address this by adding a Kyosho Stock racing class to our club racing to help bring in new racers with more affordable entry costs so that they may participate and compete while learning if the hobby is indeed for them. They can choose to up the ante so to speak by joining our HFAY racing and other local events or some may find it's not for them and decide to move on to something else with minimal loss. With Kyosho USA's support of stock racing, we will be joining them in establishing this class and use the rules established by Kyosho USA for their stock class racing. We will be following this rule set as developed and revised by Kyosho USA for the basis of our Kyosho Stock Class. Who knows, if they ever decide to restart the Kyosho Mini-Z Cup series, we will already have experience with this class

Here are the Kyosho Stock Rules, (Ver. 2.3) Updated on 12-23-2019

Open to any Kyosho Mini-Z Racer FWD, RWD, and AWD Chassis, Iwaver/Fire-Lap Racer and AWD Chassis. Chassis can be any configuration including LM and wheelbases from 86mm to 106mm.

• Chassis - No modification (shaving or drilling unless absolutely required for proper part operation)

• Motor - User choice; Kyosho Racer and AWD Stock, or any manufacturer 3500KV or less rated Brushless Motor (PN V1, V2 or V3.1 ONLY), or PN PNWC 70 Turn Ball Bearing Motor (132370) or Kyosho 4100KV Brushless Motor (MZ606). 6-9T pinion gearing for brushed motors, 10T permitted for brushless. Please note use of 10T requires clearancing of motor spacers, etc. for proper gear mesh.

• PCB - No modification allowed except for updating to current PCB board. No Gyro permitted, no increase in quantity of FET's permitted. This accommodates periodic changes or upgrades in PCB design with regard to frequency, etc.

• Bodies - Must be Kyosho Kit or Autoscale body, or full painted and assembled white (unpainted) body. Modification (shaving or drilling for weight savings and aerodynamic gain, adding wings etc) not allowed. (Exceptions; hole may be drilled in rear deck lid of Ferrari F355 to allow for damper clearance as example, front splitter or low air foils that protrude to sharp points may be rounded at corners/edges.) custom painted bodies must be fully painted and ALL accessories excluding optional kit parts (rally light on Toyota Celica for example). completed body must be within 2 grams of original Autoscale weight (average weight of Autoscale rear spoiler). Bodies found to have greater deviation will not be permitted. R246, Iwaver,/Firelap, GL Racing Autoscales are acceptable.

• Wheels - Any Manufacturer plastic wheels only. Wheels/tires must be of appropriate width and offset for respective Autoscale and fit inside the body.

• Tires - Any Manufacturer brand rubber tire (No grooving, cutting or silicone based tires allowed)

• Batteries - Four AAA batteries. Alkaline, Ni-MH or Ni-Cd batteries may be used. No other type of battery may be used. For example: Lithium Polymer may not be used, Ni-Zn may not be used.

• Ball Bearings - Any manufacturer non ceramic ball bearings are permitted.

• Front Suspension - Manufacturer stock suspension and parts permitted ONLY. Optional front suspension springs are permitted from Kyosho Circuit Pack (MZW2019C, MZW2015MM, or MZW2015RM). Please note, there are three versions available, all are acceptable.

• Rear Suspension - Manufacturer stock suspension permitted ONLY and assembly appropriate for chassis type (example, LM stock configuration includes rear damper. Other kits include Kyosho Rear Shock Set #MZ206) Please note, as of December 2016, Kyosho has updated the Racer line to include the MM2 rear end with retail kits in stock form (not Limited, SP, Cup Class, etc.). MM2 Set #MZ217.

• H/T Plate - Any Manufacturer H/T plate permitted, must be appropriate to stock wheelbase for chassis configuration and Autoscale selection.

• Wheel Nuts - Any Manufacturer wheel nuts permitted.

Modifications to the rules
• If you put it on the track you acknowledge and accept the potential/possible outcomes therein, to include but not limited to lack of first place finish and or damage to car resulting from the track and or interaction with other cars on the track.
• Oils, lubes, greases, tire tape will be allowed in our series.
• Allowable ESC modifications are limited to the replacement in kind (same as stock) of fets and other board components.
• Autoscale modifications are limited to the minimum clearancing needed for operation of permitted equipment. Shaving bumpers, skirts, windows, etc. will not be allowed. Please choose your autoscale accordingly as there will be no exceptions made thus no excuses.
• Wiring must remain stock except you may replace motor wires with like wire. IE; replace stock motor leads with Turnigy 24awg wires. You may replace the stock antenna wire with like wire.
• FWD, AWD and RWD chassis may use the aluminum motor spacers to assist in dissipating heat.
• Kyosho SP Pinions are permitted as you get all 4 pinions sold in convenient parts kit. MZW119.
• Kyosho Circuit Pack (MZW2019C, MZW2015MM, or MZW2015RM) are permitted.


If here are any questions, please don't hesitate to ask and we will update this as needed.

MR-01 stock parts kits can be found here.
MR-015 stock parts kits can be found here.
MR-02 stock parts kits can be found here.
MR-03 stock parts kits can be found here.

Last edited by arch2b; 2019.12.29 at 01:31 PM.
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