I have an 90 model 883/1200 conversion. It's chain driven w/a 4-speed tranny.The little pig is very hot thru the 1/4, but the vibration at high crusing speeds is brutal(70 to 80). From the plant it rolled 21t in the front and 49t rear. I went to 50t rear about a year ago ,and it helped a bit without losing lowend pull. I just bought a 22t for the front hoping it will solve this issue,but I was considering 22t & 51t . I assume I will have to buy a longer chain as well. Has anyone ran this gear? I can afford to lose a bit of low end.I built the bike as a barhopper/worktruck,but I like to make local runs & rallies.Any useful info?