Picking up my new Z400 on Friday.

Would like to know the best way to break it in.

Of course I can't wait to open it up, but just how long before I can do this is the question.

 

alelks,

Welcome to the ATV Connection forums.

I would do what it says exactly in the owners Manuel. You can't go wrong doing that.

Chet[img]i/expressions/face-icon-small-wink.gif[/img]

 

alelks

Following the manual is a good idea, but I use Duncan Racings suggestion. I figure they have built more race winning quads than anyone else. Their engines are some of the best so I figure whats good for them is good for me. Here is a link to their site.
Duncan

Just go to the Tech Center portion and click on the 4 stroke engine break-in.

Congrads on the new quad you'll love it.

 

Thanks for the info Guys!

Doesn't look like I'll be picking up my Quad until Monday now. Shipment didn't come in today as expected.

Figures, I'm leaving for 2 weeks on Tuesday so that means I won't get to ride until I get back.

 

I read that Duncan page. On one hand it looks like a PITA to do all that, but on another hand, it would take a lot less time to do that then to ride gently for 20 hours.

Rob

 

Yea!

I can definately see some advangtages though, like the cool down period between each step.

Not a bad Idea!

That way things get to seat in without so much heat being built up over an extended period of time.

I still plan on taking it easy for awhile after their recommended break in procedures.

 

a break in period is a crock of *****. If you have jetting correct. A new piston should perform perfectly. It doesnt need to wear at all.

 

Fez, breaking in an engine is a good thing. The reason is to get the rings to seat properly. With a brand new motor or a freshly rebuilt motor, the rings are not perfectly fit to the cylinder wall. By breaking in a new motor, you allow the rings to wear to the cylinder, giving you a perfect fit, and therefore, the best compression and oil control (4 stroke engines) possible. Also, heat cycling the engine is important. As metal is heat cycled, its properties (mostly dimensional) change slightly. That is the reason for the Duncan method. If you do not break in a motor, you are not going to blow it up, but you will lose some performance and the life span of that ring and piston set will be less, leading to more rebuilds over the life of the engine.

 

break it in how ur gonna ride it thats waht the machanic told me when i got mine he said if ur gonna ride it hard break it in like that and my z is great

 

I've burned about 2 tanks of gas through my new z400 and looooooooooooooooooove it!! Now I dont' ride my cr250 at anymore :-(
congrats on the new bike!!