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So today I was out riding around to try and start the break in process. Put on about 18 miles and 2 hours. I'm wondering if following the 10/20 hour break in process is actually necessary or if I can simply ride it like I would normally and change fluids at the10 and 20 hour marks? I understand this is what Yamaha tells you to do, but in reality it seems that as long as you get the "break in" fluids out and replaced in a timely manner, it should be fine.
 

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I think that if your normal riding situation doesn't involve any heavy "work" like pulling logs or other loads and if you can refrain from opening the throttle over 1/2 and 3/4 you are OK to ride it normally. In my experience is important to vary the engine RPM and never give it full throttle while in break in period.Some people think that multiple thermal cycles are helping- that is when you operate the engine until it reaches normal temperature and then allow it to cool down completely before the next start up.
 

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Avoid prolonged high rpm is the most important thing to avoid. Varying engine rpm and load is important as well. Going out and doing some medium-paced trail riding on a twisty, hilly trail is the best way to break them in. Plenty of variation on rmp and load and plenty of engine breaking, which is important as well. Just don't be "ricky racer" for the first few rides.

I still put my motorsports engines through several thermal cycles but I think that is a habit I need to break. It doesn't matter for sleeved and liquid cooled engines. Just a habit from 20 years ago.
 
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