Basic Kart Setup for Q31Z

[Jeff Cloud]

I purchased a new 2003 Q31Z chassis from my local kart shop (KAM Karting Ft. Worth, TX) a few months ago, and I was wondering if you might have a basic setup that I could start with? My local track is North Texas Kartway (where the Rotax Nationals were held), and I'm running Rotax Max International. This track is ½ mile long asphalt and is considered by many to be medium grip. I weigh 171 pounds and am 6 feet tall. I really just need a good starting point.

Thanks, Jeff

[Dave Skinner]

Jeff

Here's where you should start:
rear track @ 55"
front track @ 3 spacers (spindle mount wheels)
front bar installed
1 seat stay on each side- tight

Thanks for your question

Dave Skinner
Technical Programs director
MRP Motorsport

[Ron Pattison]

How about 4th rail tie bolts?

[Ron Pattison]

Sorry, I was think about R-31

[Jeff Cloud]

Would that be three thin or rhick spacers? Also, what about seat position or corner weights? I have access to some scales.
Thanks,
Jeff

[Jeff Cloud]

Dave,
Do you have some more information on setup? Front track width (in inches), caster, front ride height, seat position, corner weights? It's raining this weekend, so no racing, but I'll be ready to try some of your suggestions next week. Let me know your thoughts.
Jeff

[Garry Lobaugh]

Dave is out at Norway with customers. We don't worry about corner weights. We look at handling once we have the basic set up that dave gave you previously in the first answer. 55 inches rear, 2 thick one thin spacer in the front neutral ride height, if you need seat placement information, then call in on monday for the exchange as it is dependent on height and weight of the driver. Usually a 44x56 per cent front to rear and equal across.

[Jean Stafford]

I'm surprised that you didn't get info on the set-up.

We run two Q31Z, or rather CQ31 Z Karts. These differ on the spindles, as they have 10 degree spindles, and not 12 like the Q31 Z Karts, jowever, the set-up should be similar.

Rear Track 54-1/2 to 55 inches OVERALL
Two large and one small spacer in the front.
Mag wheels all around. (Aluminum will give the symptoms of a softer axle, slightly.)
Seat height; Level with the bottom of the frame for medium weight, 1/2" above for light driver, or 1/2" below for fat boys like me.
Weight distribution, 41-43% on the front axle, left to right 50-50, or as close as possible to this for road courses, and 50% Cross weight, left rear to right front.

Weigh the Kart with the driver suited with helmel, and in driving position. (right foot forward.) A 5# weight can be substituted for the fuel in the apprx. location.

Try to use as little caster as possible, and check the camber carefully. Again with the driver in place. Generally 4-6mm of camber WITHOUT the driver will get you in the ball park

All of this info is based on a Yamaha Lite and/or a Masters Yamaha driver so use your head. The best thing you cah do is test, test, test.

If there is more I could help with, visit our website, give me a call, or drop a line. As a Birel Dealer we're all willing to help as much as we can.

Good luck.
Jean Stafford
www.staffordsracing.com