How to 'brake in' a new bike? (ninja300)

[transam]

Interesting that Porsche, among others, put in full-synthetic oil from the very beginning. That would certainly go against the break-in recommendations that I have read on this forum.

Because the Porsche ride released to the customer has been dealt with. Your Toyota is a different ball game.

[Beardog]

When I worked for Harley-VW- BMW& Porsche the break in off the bench for an engine was all the same. Hit it & quit it 3 times.

The break-in period recommended by Porsche is notoriously long- 2000mi/3200km and a 4000rpm rev limit.

Here's an explanation from their own engineering department- what they have to say is true for any high-performance engine, be it car or motorcycle:

http://yel.pca.org/porsche-engine-break-in/

An excerpt as to why bench-testing an engine doesn't equate to street use:

When the test was completed, a Porsche engineer came over to review the results. I couldnt resist asking the question that I had been searching to find an answer to for all these years. I asked why does Porsche feel it is safe for a new engine to run at nearly full throttle in the factory, while the customer must keep the engine speed to no more than 4,000 RPM for a 2,000 mile break-in period? I thought that was a logical question and if I do say so myself-well stated! The engineer replied, Herr Koop, you do not understand (that I already knew). When we do our engine test, the metals inside the engine never reach the temperatures they would when driven on the street since the test session is fairly short. In other words, the bearings, pistons and cylinders never get a chance to thermally expand to their maximum. Therefore, there is little wear on the moving components. But when you drive a car on the street, the engine parts expand considerably more because of the heat being generated from the engine running for an extended period of time. No matter how tight the tolerances are, there is always a slight amount of expansion in the material. The moving parts can wear quickly if exposed to excessive heat and not always in a uniform way. We also constantly vary the speed and allow the engine to run at both high and low RPMs.

Exactly the reason if the engine isn't stretched hard in the setup the engine parts will never burn in right When setting up top flight fuel engines the break in is extreme. But I worked for shops that built Porsche motors & they never went with the break in period like Porsche engines.....But then they probably were not building race engines more than cars built for production where the average Joe isn't going to push 170 MPH. I build mainly Hi pro engines meant to race. Even the VW's came in at 1500cc-1600 cc went out as a 2300cc. I personally would never dog the engine with that low of revs & neither would any engine builder. If they want a dog get a VW. But that being said they would way rather you have a grannys car rather than a race car under warranty!

Edited November 3, 2013 by Beardog

[transam]

Hmmmmmmmm, an engine that is ''built'' will deal with any RPM. Low or High if it is ''built''. All production engines are over engineered to last, to get out of warranty, who ever is operating it..