IF YOU WANT TO KEEP YOUR BIKE RUNING FOR A WHILE DO NOT EVER AND I MEAN EVER USE LEADED FUEL!!!!!
some of you may be old enough to remember this but im betting a majority are not. back in the day when leaded fuel was the main fuel to run, you were concidered extraordinarily lucky to ever see 100,000 miles on your car. in fact 75,000 was pushing it. now a days its not uncommon to see beyond 200,000 miles.
you ask why? simple answer. first off, lead as an addative was to serve one purpose, to aid in lubrication on valve train, and quiet valve seats. it also provided a more controlled burn as the technology was not available for differant addatives to produce the same controled combustion as thy are today. how did this shorten engine life? again, simple answer. over time the lead would deposit itself in alot of bad unwanted places, like, causing build up on valve seats, building up under the piston rings resulting in premature wear, as well as a number of other places that i could list for an entire page and a half. lead was discovered to be both the engines friend in the short term, and i mean short, and the engines worst enemy in the long run. unleaded fuel was introduced at first as an emission control measure back in the 60's as the lead would destroy catalityc converters in no time. but it was discovered that due to the new addatives making lead obsolete, longer engine life and better performance was a welcome side effect.
back in those days, a motor with 40 to 50 thousand miles on it was looking at a total overhaul in its imediate future. think about how long it takes to put that many miles on by todays standards. now apply that to this small engine that , A. was not designed for that type of fuel, B. has a much shorter life span as it is, and C. is incapable by design to create the compresion and the thermal temperatures required to expel the lead at anything close to resembeling an efficiant manor. thus making the damage done increase all the more.
add all of that together, now how long do you expect your machine to live?
pretty expensive gamble to take with something as presicely enginered as these have proven to be, wouldnt you agree?