4 stroke break in procedure?

i googled it and found varied results, from running it super hard to idling it, what is the best way to break in a 49cc 4 stroke? thankyou,

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id rather have a bottle in front of me than a frontal lobotomy,


-linnix13(at)gmail,com

Idling definitely isn't the way to go. Engines get the least amount of lubrication at idle.

i figured, but riding it hard sounded bad to, i broke my 2 stroke in by running it super rich(13:1) and running it smoothly and slowly for 500kms, but this is a 4 stroke, so whats different?

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id rather have a bottle in front of me than a frontal lobotomy,


-linnix13(at)gmail,com

4-strokes aren't as picky about break-in as 2-strokes. I've run them hard and taken it easy both, never really seen much difference either way.

4 strokes need the same break in proceedures as 2 strokes.

Start the engine and let it warm for 30 seconds or so and then ride away gently for a minute until the engine gets a little heat in it.

Then, vary the throttle amount and engine speed.

Do NOT lug the engine down.
Do NOT rev it to the red line, at least until you have full operating temp.
Do NOT leave the engine idling for excessive amounts of time.
DO change the oil at the recommended break in interval.The break in oil in a four stroke is NASTY!!! Full of all kinds of stuff, like metal, rubber bits (I've seen it) and other assorted goodies.

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If it ain't broke, and you mess with it long enough, it will be.

don't let it idle long and vary the throttle (I never felt any difference like when a 2stroke was broke-in)
agreed with the oil changes...
I changed mine every 100 miles till 500, then every 250
gonna do my 2750 mile change today

__________________
Bill
EZ Motorbike Dealer - Fountain Hills, AZ
www.ezmotorbike.com
azgrampa@gmail.com

I changed my oil after the first hour, it was already black. I did the oil every 100 miles for about the first 500 too, now I go about 150 miles. My little Subaru only holds a tiny amount of oil and oil is a lot cheaper than an engine.

Before you ride the bike, start the engine and bring it up to operating temp while slowly varying the throttle, don't over rev the engine, just go a little over idle then back to idle, then let it cool to room temp and you're ready to fire it up and ride. Start with short rides and get a little longer each time.

every 100 miles? i do that daily! i hope the engine doesnt take much oil!

__________________
id rather have a bottle in front of me than a frontal lobotomy,


-linnix13(at)gmail,com

I have the R/S 4 stroke on a Staton kit. I don't get to ride much so I just turned 175 miles today. I am on my third oil change and will change again this weekend. Very quickly the oil gets a strong odor of gasoline. The last change was probably with 50 miles (probably 3hours use) and the oil was black had had the gas smell. I have seen other post of this forum from people having similar issues. I bought a plastic syringe at Wal-Mart and put plastic tubing on the end to "suck the oil out". I tried it first on a cold engine and it took awhile. Next time I waited until I came in from a ride, let it cool down some and then sucked it out. Worked great. I can change oil in less than 2 minutes. I use Castrol 10w30. You can get 8-9 oil changes out of a $$3.00 quart bottle so I will continue to change the oil often. Much cheaper than a new engine.

As far as break-in I have always heard not to run at a constant RPM. Needs to be varied. With the hills around here from day one it has been high power or idle pretty much. I never run at full throttle. On flat ground it will cruise at 20-22 mph on 1/2 to 2/3rd throttle and that is fast as I want to go. After a ride I always allow it to idle for 1 minute before I shut it down. Allows temperatures to stabilize (picked that up when I use to fly supercharged piston aircraft but it was 2 minutes for them).

a Hua Sheng 49cc takes 250ml 10w30
I keep the old (still pretty clean tho) oil in a bucket for soaking chains

__________________
Bill
EZ Motorbike Dealer - Fountain Hills, AZ
www.ezmotorbike.com
azgrampa@gmail.com