I'm starting my KTM380 project using a 2014 KTM 250SX frame and swingarm and I removed the swingarm bearings and noticed that the swingarm is worn quite a bit on the inside on of the chain side.
I'm thinking it should be flat all the way around like the other side, not have a rounded shoulder on it.
To fit the 380 engine in I need to machine spacers totalling approx 3.5mm. I thought one option could be get enough machined off the swingarm to make it totalling flat, but I would have install new bearings and seals to see if I have enough room to do this. Or I could buy a new swingarm or just use it as is.
Thoughts and suggestions???