Seat Position for ALL Chassis

[Caroline Lobaugh]

After reading the question on the seat position for a CR31SR, Chris helped me in getting all the different karts measured and figuring out a BASIC seat position.
AR28/AR30/R30
Left= 58.5cm
Right=59.5cm
Top of axle to top back of seat=23cm
Bottom of seat flush with bottom of frame rail
**If running soft tires OR on sticky track, lower seat

Q31/CQ31/R31/R32
Left: 59.5cm
Right: 60.5cm
Top of axle to top back of seat: with 40mm axle=23cm, with 50mm axle=22.5cm
Bottom of seat: 5-7mm below bottom of frame rail

CR31/CR32
Left: 6cm
Right: 62 cm
Top of axle to top back of seat: with 40mm axle=23cm, with 50mm axle=22.5cm
Bottom of seat: 5-7mm below bottom of frame rail

*The measurements "from top of axle to top back of seat" is with the axle DOWN

**These are only suggestions. Given a different track, different conditions, different drivers, different engine configurations, a different seat position might be more beneficial. This is only a starting point.

Caroline Lobaugh
MRP Motorsport

[Bruce Boman]

Caroline,

A couple additional questions.....

How does a CR932 fit into the mix?

Are the dimensions you give, strictly for the stock seat? Basically does a Ribtect seat change those dimensions?

Thanx in advance.....
Bruce A Boman

[Garry Lobaugh]

All team drivers of MRP and Birel only run the stock seat. Time and again after exhaustive testing have provent the stock seat is the fastest. Birel does offer a padded seat at a lower price that the Tillet. If another seat would improve kart performance (stop watch) then they would supply it. I suggest you contact your seat manufacturer for any tips on seat mounting. Sorry.