Tip By Mo...
Drilling Wheels For 3/8" Lugs
new karts come from the factory with 1/4" wheel lugs. They do this
because the kart is designed for a 5HP engine and seldom
attains speeds greater than 50 MPH with little lateral pressure on the
lug screws and nuts. As the driver progresses to the larger more
powerful engines and faster classes, the need to increase the safety of
these wheels is accomplished by increasing the size of the
lugs and lug nuts to 3/8". If this modification is done correctly, you can end up using your wheels on either a 1/4" or 3/8" hub.
How To Do It:
A Hub (front or rear with 3/8" threads for larger screws, use an old junk hub because it will not have threads when finished)
11/32" Drill Bit
Time To Do It (about 15 minutes per wheel)
1. Bolt the hub onto the wheel that you want to drill.
Locate the 3 larger screw threads in the hub. They should be half the
distance between each of the screws that your just used to
bolt the hub onto the wheel. Use your hand drill with an 11/32" drill
bit and drill the hub and wheel. The first wheel you drill you
will also drill the hub, after that you will only drill the wheel. You
can now unbolt the hub and bolt and drill your next wheel. The
end result should be wheels with 6 equally spaced holes (3 for 1/4" and
3 for 3/8" lugs). Once you get set up, you can drill your
entire wheel collection in a very short time.