K-Dub
02-16-2005, 07:06 PM
I bought a used 450r from northern Minn, and brought it to south eastern OH. It had less than 5 hrs run time on it. It has the HRC kit put on at purchase from the dealer and everthing else stock. Now here is my problem it backfires and sometimes backfires and stalls when I let off the throttle also has a hesitation when I first shove the throttle wide open from full shut. Second thing after riding it hard for about 5 hrs yesterday the muffler is carboned up. Havent rode for 9 yrs but had 15 yrs riding and racing exp on 2 strokes prior. This is what I think I need to do (no four stroke jetting exp) go richer on the pilot and 1 notch leaner on the needle and drop the main jett as most of the time when I ride its half to full throttle. I also turned the idle up a bit, this seemed to help with the backfire and stalling problem, but dont want to leave it that way.
1 more question, does twin air make a good air cleaner for the 450r? I read alot of the air cleaner threads on different sites but didnt see anything about twin air. That is what I ran on my 250r and CRs.
Thanks for the help.
1 more question, does twin air make a good air cleaner for the 450r? I read alot of the air cleaner threads on different sites but didnt see anything about twin air. That is what I ran on my 250r and CRs.
Thanks for the help.