VRCustoms

I hated stock exhaust on my atv. It was rusty,loud, ugly. I needed better exhaust. After carb modification it looked like this.

I bought KTM 450 sx stock exhaust. It was almost new. Exhaust is suitable for 300cc atv. I didn’t want it too loud, cause it must be road legal. So enduro exhaust is fine.

Diameter of stock exhaust pipe was 25 mm steel pipe. I decideced for 35mm inox pipe. I had to weld it with arc welder and inox electrodes. I must say that I don’t like arc welder, but without TIG welder that was only propper way to do it.

First we had to make new flange. I cut it with grinder, drilled 35mm hole and 2 holes for screws.Then put in on cylinder and used 2 inox 90 degres elbows to get proper angle of pipe.

Then some cutting welding, modifyng, making it fit.

I also needed to make new mount for muffler. I made simple, fast and propper solution.

In the edn it looks like this. Perfect fit. I will need to do some small mods for sure. But it looks and sound awesome.

There are much better accelerations in mid range of rpm. After replacing exhaust you will need to adjust carb 😉 Maybe I will upload video with sound later.

My friend Mare was great help. We spent 8 hours in garage, working hard. So fall in that we forgot to eat and drink. Late in the evening it was BEER time 😀

I never welded on atv !! I didn’t want to burn it. So I just marked both pieces and weld it on the floor.