**OTK 401R, completely standard in terms of front torsion bar, rear axle etc. **
Running in LO206 Senior at Whiteland Raceway park (365lbs weight), Bridgestone YLC tyres.
OTK Mag wheels (almost certain they are MXC) 130mm front, 212mm rear on 4.50 and 7.1 tyres. (Tyre type and width is mandated)
Looking for a bit of advice as while I am hugely experienced with 2 strokes, mainly shifters, I have recently added an LO206 to the stable which is completely new territory for me as, except for some Le Mans 24hr races 10-15 years ago in twin engined Honda Prokarts, 4 stroke karts are alien to me.
I have an OTK 401R and have set it up from a chassis baseline sheet I got from the forum here.
- The setup sheet is for Mojo D2 tyres (the above setup sheet says they like up to 6 deg neg camber), I’m using Bridgestone YLC.
- I believe the setup sheet is aimed for 2 stroke engines, as from what I have read the rule of thumb is 4 stroke/206 karts need to be setup softer. Something I haven’t experienced since my Formula TKM days.
1mm toe out
2mm neg camber per side
Standard caster (Both pills with arrows facing forward) which I believe is 10.2 degrees
Front torsion bar flat
No 3rd bearing
1 additional seat stay per side.
Front and rear track width as per above setup guide
Seat is set 5mm below frame rail as suggested.
I have done one event in the kart and it felt good, laptimes were competitive. However I did feel the rear needed to be more planted. Some of this is needing to adjust my style to 4 cycle but I’m experienced enough to know it wasn’t all this. The front was amazing, maybe too good and causing the rear to break away.
So I’ve started with softening the rear by removing the additional seat stays per side (yet to test it) but just wanted some tips on if my train of thought is good for next steps if removing the bars doesn’t help:
- Reducing rear track
- Move ballast up higher on rear seat
- Increasing front camber
- Reducing front Ackerman
- Reducing front caster
I also have to run insane amounts of lead (about 55lbs) as I am about 145lbs soaking wet so have SOME opportunity to move weight around, but with that amount of ballast most places to mount it are already taken.
I have managed to find some snippets here from LO206 drivers who have used an OTK at WRP and the consensus seems to be go softer, which is why as I said above the first thing I am trying is to remove the additional seat bars, but I just wanted to double check my train of thought above is consistent with what needs to be done for a 4 stroke setup given the chassis is essentially a 2 stroke chassis.
Thanks in advance.