[Maylands Performance]

Hi PB performance.
We run motors with only IRK fitted,some with only the oil slinger fitted,some with both.With no failures to date !!
Note ..Of course there will be a failure sooner or later due to the slightly suspect strength and metallurgy of Chinese cranks !

Running with or without an Oil slinger or IRK does nothing to affect engine balance.
In fact the lighter the flywheel weight or magneto the less strain there is on a crank.
I actually balance motors for a living,and have balanced and built all types of motors ranging from Keith Black Hemi,Porsche 911 to vintage traction engines !
Regardless of whether IRK kits are fitted or not the unequal torque loading on a motors crankshaft from front to rear will ALWAYS occur due to the simple fact only one end of the crank is actually taking the driving load causing torsional twist.
9 times out of 10 a rider using a pitty fitted with an IRK/oil slinger is going to rev the daylights out of the motor just for the hell out of it.Therefore increasing the chance of crank or motor failure. ! Hmmmmmmmmm !?
Ps..Extra weight can always be added to the IRK to give a little more flywheel effect ,decreasing the stalling situationt !

Anyhoo ! enough crapping on by me,and I am not interested in getting into a pissing match with someone who disagrees with my point of view.If they do good luck to them ,if we all agreed with each other the world would be a boring place LOL...

Back to the motor in question here. Remember this 1P56FMJ fitted STD to the XR140 is the same motor that is sold for big bucks as a Motovert 141cc option.
Note..Some of our new bikes in stock also have the new all Alloy cylinder fitted to these motors too...1P56FMJ,IRK,New Inlet manifold design,stronger Kickstarter,stronger kick start gears all at no extra charge !!
What a Bargain .

Cheers Brian