Actually, I am not sure, its not marked. It looks very similar to Feds EEE silencer in size, shape and with the turned tip outlet. The main difference is that one end is welded and the EEE can be opened on both ends.
I have several quad and dirt bike silencers laying around so I modded one the fit my normal rider 350. It was a long FMF from a 250R quad. Not sure I like the mounts I made, I guess some trial and error from some rides will tell me. I can always put the ear splitting DG silencer back on too.
Fed and I did some drag race testing Friday. OK, first we raced his HRD clutched, 20" Sand Stars, built 350 against my normal 350 rider that I just installed the heel clickers in the 102C clutch and still had the 24" skats on it. It was bogging off the line and never revved up to normal high RPMs. He hole shot me to where my front bumper was near his rear bumper and then we stayed like that all the way up to 50MPH or so, then we ran out of room. We made several runs all of which had very similar results. I looked at the marks I made on the clutch face with a marker. The belt never got to the top(fully closed).
I pulled the clutch, adjusted the arms (added weights)to give a higher stall and heavier tips to give higher RPMs. If he comes out today, we'll test it then. I also put the 22" spider tracs on and the silencer. I am thinking about putting the dial a jet back on too.
Fed wanted to race the 420, he said "I am feeling pretty cocky now". I said sure, why not. :twisted: :twisted: :twisted: We went about 3 times or so, all with the same results. I would hole shot him by around a buggy length and then proceded to just walk away. I couldn't see him so that is what he said. I know that it pulls really hard all the way through. We will put some paddles on it next weekend and take it to some sand.