Just installed my HMF slip on today, what a freakin difference. I held out for 2 years not to upgrade my exhaust so I can keep riding the track at my house without disturbing neghbors. Now I'm wondering why I didn't do it sooner.
Now for a quick jetting question, my 400 pulls hard in all ranges, the only place I can see where I need to go richer is in the pilot jet( it pops on deceleration). Or will the low speed screw in the float bowl work for me? Would you guys still go richer on the main jet even though it's running fine, maybe like a 155? thanks for your help, sorry so long.:square