2009 Monza (Blue Birel) R30CY
30mm main tubing, no front or rear bars
40mm Freeline “F” Axle (Fairly soft), no middle bearing
LO206 Sr (365#) at Whiteland Raceway Park (Whiteland, IN)
4.50"(on 5" wheel)/7.10"(on 7.75" wheel)Bridgestone YLC (Required Rubber)
I’m 5’10" and about 175 lbs, but with a 6’2"+ equivalent tall upper body (my inseam is 28"), the current seat is an IMAF F6 in ML and is super haggard and needs replaced. Looking for a sounding board type feedback/recommendation for my situation or all taller upper bodies in general
Last season (my first, only have 5 races under my belt!) I was having some intermittent issues with the kart binding and hopping through hair pins (mainly the rear). Some friends at the track said I was wayyy too wide on the rear and upon listening I went ahead in the offseason and switched to narrower rear hubs to try and free it up. (Went from about 115 mm to 100 mm hubs each side)
The problem I have is the track has went through a pretty substantial and much needed repaving in the critical turns. And since the old “medium to low grip” track was giving me a hard time, I will probably need to shift my setup window a bit to help free the kart up. I.E. try and soften the rear with the new seat.
So when picking a seat I was eyeballing the Tillett T11 VG (flat bottom and soft), and was planning to mount it per the setup guide from Birel I found for Tillet seats (10 mm below the frame rail).
Am I crazy or does this seem fair? Should I consider mounting the seat a little different? Flat bottom with ground clearance doesn’t afford me any flexibility in terms of angle (all tilting options will cause a higher CG than parallel with the ground). Still have plenty of ballast to throw around (was about 20 lbs), and a few other hub options for further tuning.