You guys are having a good little conversation here.
These are the rules we came up with this year in the new Mid-America Lightning Sprints Presented by Jayhawk Millwrite tour. Had to get the sponsor name in.
www.midamericalightningsprints.com
MOTOR:
Four (4) cylinder, four (4) cycle motorcycle engine only. 1000cc Stock bore and stroke only. Honda, Kawasaki, Suzuki and Yamaha only legal motors allowed.
Kawasaki 2011/12/13 ZX-10r, Yamaha 2012/13 R-1, Honda 2012/13 CBR-1000RR and Suzuki 2012/13 GSXR-1000 Are NOT legal for 2013. We will take another look at this rule for 2014.
Older big bore motors are legal, ie 1100cc bored to max of 1205cc or anything in between. These are open motors with the exception of CC limit.
ZX-12 are legal and are subject to same stock rules as 1000cc motors.
Big bore kits on 1000cc motors are illegal.
In an attempted to equalize out the torque advantage of ZX-12 motors they will be at a different weight. Please review weights listed below.
Electric self starting. Car must start under its own on board starter at the beginning of each night.
Charging system must be operational.
Clutch must be operational and be OEM
Alcohol conversions allowed. No engler injection system allowed.
Stock head, cylinder, crankshaft and crankcase. Head must use only stock parts. No after market parts are allowed. After market stock non performance enhancing pistons and rods are allowed.
What does this mean? This means any steel rod and any stock weight piston with stock compression ratio may be used. MALS realizes that it is not cost effective for the racers to blow 1-2 motors a year. There for IF motors can be made more reliable by replacing the so called weak link we feel it is better for the growth of the sport to implement this rule!
Six (6) inch offset-measured C/L of motor and C/L of frame.
Motor inspection will consist of measuring the Bore & stroke, Bore Scope, compression gauge, engaging all transmission gears (must all be operational) taking of fuel sample. All motors subject to CC verification.
Violations will result in Disqualification. No money paid out for that night if disqualified.
Correct motor year and model ECU must be used. ECU re-flashing is legal.
No after market ECU allowed.
Maximum compression limit #240 hot or cold. Anything over is illegal.
All drivers must have OEM motor spec sheet with them. (OEM manual) This can be downloaded for free from the internet.
We still have several older motors in this area and we dont want to force these guys to go buy a new motor if they have a good old motor. And with the dyno work I have done there is not a big advantage of the old motors vs the new motors.