Green is good. Green means go. Better spark but downside is they suck more juice outta the electrical system but thats not necessarily a negative. Just be sure the charging system is working properly and EVERY connection is clean, tight, and greased with dielectric grease. Heavy city driving could create a low voltage issue. If that happens just keep your rpms above 2000 or more by throttle or lower gears. Get a Battery Tender and keep it hooked up. That will have you ready to leave each day and prevent you from buying a new battery every year.