I have a 1977 FMB Yankee Peddler with the popular Minarelli V1. The motor seems to run great, but every now and then it seems like it wants to pull harder and top out with a higher speed. What would be causing this? Is it running lean/rich? I haven't have the carb off yet, but I guess I should take it off and check it out. The guy I bought it from said he cleaned it out, then mumbled something about a slight leak. Sure enough the thing tends to drip a bit after its been running... not sure from where though. Any help would be great... thanks!