Most of guys who bought KTM TPI from first production they had this problem with leaking oil tanks. I also had leaking oil tank on my EXC250 TPI but after replacing it with UPDATED version of tank that problem is fixed for me, but for some guys also new tank started to leak. I think its just bad quality of plastics and very weak point for bolts.
I also found on some KTM TPI bikes the rear mount for this tank was welded not straight, so that also can cause tank to crack because one bolt is holding more than other one. Soon i will do video about KTM TPI PROBLEMS & HOW TO FIX IT so also this will be covered in that video.
ktm tpi oil tank leaking
Most of the guys who bought new KTM EXC TPI 2018 having this issues with leaking 2 stroke oil. For first I was thinking I over filled my oil tank with 2 stroke oil and that is the reason why my bike wet from oil.
But after small check after washing the bike I can see small leaking from the oil tank after I removed the tank I can see where it was leaking. I contacted my KTM Dealer where I bought the bike.
From KTM Dealer I got the email, this happens because of vibrations from frame and engine. KTM Factory will produce the second version of this 2 stroke oil tank, it will be stronger and not possible to break from vibrations.
I welded plastic and then used double glue for maximum holding, I hope it will not break on another side, I need to wait now sometime to get the second version of this oil tank for my KTM EXC250 TPI 2018. After small research over the facebook and google, i found I am not the only one person having this problem. There are also guys on Husqvarna TE300i and Te250i 2 stroke 2018 models having same problems. So everybody is having this problem, and one guy said: we have 8 new bikes here, and 5 bikes have this problem.