Running in a New 4 stroke engine

[Scol]

I’m after investing in a 80cc 4 stroke chain driven engine kit and I should be
Getting in next week. So I have a week to source a bike or get my 35 year old
Steel frame Mountain bike sorted out !! I might get new wheels for it.

Anyway how do I “Run in” the engine ??? looking on the internet there are
Lots of ways with different options about this. “Drive it like she was stolen”
full revs for a few minutes and then ½ revs for a few minutes other reports
say ½ throttle for the first 100 miles or so and them build up.

What do you recommend ?


Shey.

 

[rustycase]

Varying rpm, no heavy loading or excessive rpm for the first tank of fuel.
Listen to the engine and operate accordingly.
Blip the throttle from time to time is all about a brand new motor type fun!

rc

 

[Scol]

Thanks for that.

 

[GearNut]

This guy has taken the time to type out in detail the same technique that has served me very well over the years:
http://mototuneusa.com/break_in_secrets.htm

It works with 4 stroke engines as well as 2 stroke engines.

 

[Sidewinder Jerry]

On my Robin Subaru engine it was recommended to to run 20 hours then change the oil. After that change it every 50 hours.