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The following is my own break-in proceedure. I have broken in several 2 and four stroke engines including some ultralight aircraft 400cc+ two strokes.
I am not a certified expert, but I do have some knowledge with engines and the interviening 35 years of playing with them.
Having said that, I'll also say I haven't got one of the two prevalent Chinese manufactured engines just yet, but the following info pertains to most engines in general.
Break-in is a combination of heat cycling parts and allowing the rings to seat. This is taken care of by riding at moderate speeds followed by short periods of wide open throttle. Wide open throttle is necisary to seat the rings to bore properly. I saw a rather spirited discussion about this on the forums...this is not that kind of post.
A couple of observations- I see reading the forums that a lot of people are finding that these engines run better if the carbs are adjusted, and the intake gaskets are in order. If I were to break-in one of these (dax) e-bay engine, I would go ahead and set the carb and check the gaskets first. More on that later.
Another one is that the engines are suggested to be broken in with a 20/1 fuel mix. That's crazy, but I understand warranty issues. I'll just say use a good two stroke oil like Penzoil for 2 stroke air cooled engines, or one of the name brand synthetics (available at places like Wal-Mart in the lawn and garden/chainsaw/weedwacker area) and mix it in the 40 or 50/1 area AFTER BREAK IN.
If the carb is correctly set and the intake gasket(s) in order, begin break in....
To do an easy and proper break in, warm the engine until it will run with no choke then start down the road. Open the throttle to 1/4-1/3 and let it pick up speed for about 10 seconds, now back off the throttle and let it coast for about 10 seconds. Do that a few times. Next open it up to 1/2-3/4 throttle and let is gain speed for about 10 seconds, repeting the slowing proceedure as well. Do that several times then take it up to full throttle and let it gain speed for about 20 seconds, taking approx 30 seconds to decellerate each time. Increase the time you spend at WOT and decellerating until you are holding it wide open for longer than 30 seconds and you are about done.
Ride at moderate speeds with short runs of WOT until break in mileage is completed. You should notice an improvement in power and smoothness during the break in proceedure, and a gradual increase in performance for the next 100 miles or so.
Questions and comments are welcomed!
I am not a certified expert, but I do have some knowledge with engines and the interviening 35 years of playing with them.
Having said that, I'll also say I haven't got one of the two prevalent Chinese manufactured engines just yet, but the following info pertains to most engines in general.
Break-in is a combination of heat cycling parts and allowing the rings to seat. This is taken care of by riding at moderate speeds followed by short periods of wide open throttle. Wide open throttle is necisary to seat the rings to bore properly. I saw a rather spirited discussion about this on the forums...this is not that kind of post.
A couple of observations- I see reading the forums that a lot of people are finding that these engines run better if the carbs are adjusted, and the intake gaskets are in order. If I were to break-in one of these (dax) e-bay engine, I would go ahead and set the carb and check the gaskets first. More on that later.
Another one is that the engines are suggested to be broken in with a 20/1 fuel mix. That's crazy, but I understand warranty issues. I'll just say use a good two stroke oil like Penzoil for 2 stroke air cooled engines, or one of the name brand synthetics (available at places like Wal-Mart in the lawn and garden/chainsaw/weedwacker area) and mix it in the 40 or 50/1 area AFTER BREAK IN.
If the carb is correctly set and the intake gasket(s) in order, begin break in....
To do an easy and proper break in, warm the engine until it will run with no choke then start down the road. Open the throttle to 1/4-1/3 and let it pick up speed for about 10 seconds, now back off the throttle and let it coast for about 10 seconds. Do that a few times. Next open it up to 1/2-3/4 throttle and let is gain speed for about 10 seconds, repeting the slowing proceedure as well. Do that several times then take it up to full throttle and let it gain speed for about 20 seconds, taking approx 30 seconds to decellerate each time. Increase the time you spend at WOT and decellerating until you are holding it wide open for longer than 30 seconds and you are about done.
Ride at moderate speeds with short runs of WOT until break in mileage is completed. You should notice an improvement in power and smoothness during the break in proceedure, and a gradual increase in performance for the next 100 miles or so.
Questions and comments are welcomed!
That couldn't be more true. Seems my bike gets more solid every day and I trust it a little more.