HPI R40 Conversion

[Z06jim]

7XL has heat sink case
May have found part of the problem though, the 7XL was missing the set screw in the end cap and it was spinning loose. Hopefully didn't damage the motor.

Still trying to figure out how to get 65mm tires to run 45 mph.
Looks like total gear ratio of 6:1 may get me there with 4s Lipo
7.5:1 with 5s lipo

By the way Prop shaft adapters will give a good straight hub for use on a smooth shaft.
Come in 6mm and 5mm to 5/16" threaded shaft.
Radio Shack project enclosure #270-1805 ($3.79) is a perfect fit for Mike's Lipo's

No broken parts yet and drives like a go-cart:027: