Under the seat there's a strut/turnbuckle, that ties the left side rail to the cross bar! I've noticed a lot of karts have them but some do not! Just wondering what it's designed to do? Seems to me it would bind up the chassis?
I may be wrong , but if you tighten or draw this link in it will tighten up the kart , or make it hard to turn....might be ok for a big track. We run ares loose with no bind, and kart turns great on short tracks. jmo
IMHO, I believe that it's there to allow the L/R tube end to flex, without breaking , as they sometimes did, then a diagonal bracket was tried ant I think it made it too stiff. I have had a chassis with that diagonal sawed in half and then a clamp could be used to tighten it up, seller told me to never use the clamp.