Be aware of the plug boots that have the brass inserts in them.

We o-ring the filter cup to carburetor seal so there is no reason for this.

There is typically no reason to have a gasket between the carburetor and the filter cup.

Do not spray brake-clean on any rubber seals, it dries them out and shortens the life greatly!.

Do not power wash your motor, we have seen that the water has a tendency to get into the engine, around the flywheel and create problems with the ignition systems.

We recommend replacing carburetor kits every 2-3 races.

We suggest the use of 108 octane leaded fuel with 8oz Burris Castor per gallon.

We recommend using a copper based anti-sieze compound on the spark plug threads.

If not you will bend the throttle shaft and make the butterfly go over-center causing much worse performance.

Make sure the pedal stop on the kart behind the gas pedal stops at the same time as the carburetor.

All our motors are tested with the standard factory gap settings. If you are very careful you can gap them but we suggest against it. The reason being is if you use a typical gap tool and push the iridium tip too hard it will fracture and break inside the engine potentially causing expensive damage.

We at MCR typically tell our customers not to gap 'iridium' tipped spark plugs.

This calming of the intake charge makes the intake charge more efficient.

Not running an air cleaner in the air box does not mean more power! A filter actually creates more power because in a piston port motor application it cuts down on the amount of reversion from the motor through the carburetor throat.

General tips that span multiple engine combinations: Many Racers ask us for technical tips so we thought we would provide a section on our website for both our customers to access as well as provide this service to the general community. Have fun, and if you want anything else please just let us know!!!

When you do this, an icon will be added to your desktop to allow you to quickly jump to the mobile version of this page. Once you get to the page, on the iPhone or iPod touch devices you may click on the '+' button and then click on 'Add to Home Screen'.

We have tested this on the major mobile devices. If you hit this page from your mobile device you should be automatically forwarded to our mobile page.

There has been an overwhelming amount of requests to make this page mobile friendly, so we figured we would. MCR Engine Development - Frequently Asked Questionsĭue to popular demand, we now have a mobile version of this FAQ page!

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