well in the paper it says how to break in a 2 stroke this is wat it excatly what it says

-start engine and let warm up to touch while blipping the throttle (do not over rev)
-run approximately 10 minutes using 80% of the rev range (do not lug engine) what does it mean by 80% of rev range?
-let cool completely to touch
-repeat procedure but use 100% of the rev range while backing off to allow engine to cool between full throttle bursts. what does it mean by 100% of the rev range?
-let cool and go race

 

i think it means how hard you rev it... like 100% being fully on it

 

i think they mean (because it says dont lug it) not to use the lower rev range and try to keep it on the powerband. however never rev the **** out of it!

 

Proper break in proceduce varies, depending wether or not you have new rings or a complete new top end. If you have just re-rung the piston you don't have to be as careful as with a new bored/hone and rings.
Start it up, blip it often till it's hot then shut if off until it's completel cold. check the head nuts/retorque them.
your first ride should be no longer than 10 minutes, don't "load up" then engine nor over rev it. You want to more or less, give it throttle then back off, gtive it throttle and back off. never full throttle for more thana few seconds, I would avoid WOT for the first ride. Run the motor where it has a chance to heat up and cool down. Quick bursts of throttle alow for mild expansion while no throttle alows for cooling and contractions. Runnin a motor to hard on break in results in to rapid of expansion and excess rubbing of the "high spots" on an unborken in piston and rings. To much heat on the unbroken in motor will result in excess rubbing therefore causing prematiure wear resulting in "low spots" the result? shortened top end life, shortened compression strength and a waste of money. increase duration of your rides, from 10 munites, 20 minutes, 30 minutes, all the while gettin more aggressive with the throttle. On a 2 stroke, after about a 1 1/2 tanks of fuel, you're pretty much safe to do whatever you want. good luck

 

i just did a top end to my blaster, and peopel told me to never give it more then half throttle and to put about 8-10 hrs on it before giving it full throttle. Also do what they said, run it, get it hot and let it cool completly. I put 2 fans on the motor to let it cool quicker. Hope that helps. Good Luck!

 

Break it in like your going to be riding it . As long as your fuel mix is right on just start it let it get up to temp and ride it . When I used to race flat track I would hone and ring before weekend , them I would go race . The fresh engien always ran the strongest . Maybe because it was loose . That wsa a few years back and Yes I trophied a bunch bike never let me down .
Your rings need to have pressure against it to make it position correctly run it hard just like you plan on riding it .

 

outlanddragster, don't be ignorant you know you can't full out ride the hell out of it on a new motor. You probably put new rings in your motors often, therefore you wouldn't have to worry about an extensive break in because you're constantly freshening it. Dealers and corporation manuals tell you 8 to 10 hours because they are covering they're ***, plain and simple. For those of you who are like most of us, recreational riders that want their things to last, you must be intelligent about how you treat your machine. Break it in aggressive but not to much, if you lug the motor and don't get it hot enough on break in the rings wont seat properly resulting in poor performance and lower compression down the road. Don't panic about full throttle so much as holding full throttle, allow for exxpansion and contraction for short duration rides, then let it cool completely. It really doesn't take too long, increase your oil to gas ratio a slight amount if you're premixing. run a good 32:1 and no leaner ratio. depending on the oil, you may foul some plugs but it's nothing to worry about.
by the way, use amsoil in your new motor if you want it to last twice as long, trust me

godspeed

 

Well it's not just an opinion . It's shared by many in the field and backed by alot of Physical data . here a link to someone who shares my knowledge ( beliefs)
On break in . theres a lot of good l reading in herenullMOTOTUNE