hi people, when i bought my eliminator i was told that i need a shim adjustment every so many kms (6000?). so that doubles the service from $200.00 to $400.00. so i am doing my researce on a new bike, now that i am off restrictions. a suzuki M50 i am told, has the same set up, every second service, a shim adjustment is needed ($400.00 min) dont know yet if the kawaski vulcan custom needs this, as that is one of the bikes i am looking at. why dont cars need shim adjustments every few thousand kms? my jet ski doesnt even need shim adjustments? is this all Mbike brands or just a few?