How to break in atc 250r??

[nd4speed]

Over 15 years ago I used yamalube from a local marine shop cause it was pretty cheap for a gallon. Me and my friend used a gallon of 2s as premix with no problems. But yeah buy the 2R if you can.

We also went to a local small air field and bought LL aviation 100 octane gas cause we thought it would make us go faster. LOL. we were dumb but we came to the conclusion that aviation fuel was not helping us after the second purchase.

So 100 octane LL av gas mixed with yamalube 2s, oh those were the days, wish I was a teenager again.....

I really like Maxima 927 oil for break in and when its hot out. But in the cold winter it gave me issues.

[onformula1]

This has worked for me for a looong time.
I like 32:1 ( I would got to 20:1 before I would go to 40:1)
Torco GP-7 or Motul 800 2T is what I like, but there are many, many good brands out there.
I like full synthetic
Break in- start the bike and run until the head is very warm to touch, let it cool, do it a second time, let it cool ride the trike- don't bog or rev for 5-10 mins.
open it up a little if it doesn't want to rev cleanly ride a bit longer, open it up again try for full throttle straight & hit the kill switch a couple of times as your riding, it cools the cylinder down, try riding at all levels- everything should be good, remember full race engines go for only 8-10 hrs before a rebuild so you don't have to spend alot of time breaking in a 2-stroke engine. I can re ring a piston 2-3 times, clean the piston with green scotch brite, polish the dome.

[crackshot]

I just got done rebuilding my top end on an 82 r. 1 gallon of race gas. 110 octane leaded with 40:1 mix. Oil was a dino type.
Every gasket on top end was sprayed with real kopper kote spray. Torqued to maximum spec.
Started on 2nd kick. Ran it for about 10 minutes at different speeds. Shut it down and let it cool even though it did not get very hot.
Started it again and this time i rode it on hard surface opening up throttle to 1/2. Did this for another 10 min and let cool down overnight.
Next day i checked torque on all the bolts and all were still spec.
Started it up and rode it on hard surface for 20 minutes opening up throttle to 3/4 with blips of wot at times.
I dumped the rest of fuel and mixed up a batch of 110 and amsoil dominator synthetic oil. This is the second engine i broke in this way and the truth is, a 2 stroke takes about 20 minutes to break in. I run all my 2 strokes at 40:1. Seems to do just fine.