Break-in procedure

[derek01raptor]

This is a controversial topic so it would be good to get a general consensus of opinion.....

What is your choice for running in a new engine?

Hard ([Only registered and activated users can see links. ])
Easy
Dont know what an engine is...

[derek01raptor]

Maybe a mod could shift this poll to the general discussion forum?
cheers
d

[CDN_YZee]

alweays ran mine hard after a good warmup

[desertfreak]

i run theme easy becuse i ran one hard and it blew up in 30 mins

[cr2504life]

I voted easy but i havent' really had a new motor to break in yet. but ill be geting my bike running for the weekend and i plan to use the heat cycling method.

[Aus_Rider_22]

Originally posted by desertfreak
i run theme easy becuse i ran one hard and it blew up in 30 mins

Same here except my YZ only lasted about 7mins max. ANd that was after a thorough warm-up.
The only thing I can use as defence to the hard running in technique is that it was jetted a bit lean.
But ever since then I warm-up and take it easy for first hour and then go for it.

But ALWAYS warm it up thoroughly to minimize risk of engine failure. Good luck!

[Crazy]

We just rebuilt a yz250 about 2 weeks ago. We held it at low rpm first for about 5 min, then let it cool down. Next a higher rpm, and let it cool down. After doing with no load, we took the bike out and proceeded to do many hard load accelerations in 3rd and 4th gear. After letting it cool down every 10 minutes and repeating the hard load cycles about 10 times the bike seemed to have double the power at the end all said and done. BTW we had it jetted at 175 (stock) for breakin and we used 18:1 mixture.

[zuki]

Originally posted by CRazy
We just rebuilt a yz250 about 2 weeks ago. We held it at low rpm first for about 5 min, then let it cool down. Next a higher rpm, and let it cool down. After doing with no load, we took the bike out and proceeded to do many hard load accelerations in 3rd and 4th gear. After letting it cool down every 10 minutes and repeating the hard load cycles about 10 times the bike seemed to have double the power at the end all said and done. BTW we had it jetted at 175 (stock) for breakin and we used 18:1 mixture.

Thats the same way I did with mine. I took it easy for about the first 30-45min then I opened it up. This was all after a rebuild.I dunno if it is the same for a new engine.

[Woody_YZF]

I have bought about 15 brand new machines in the last couple years and have done both break ins (easy and mototune). Whenever using the harder break in, the machines seemed to be much stronger and I had no problems with any of them having a shortened life.

[derek01raptor]

So it would prehaps be a fair comment to say that with the "easy" run in there would be less seizures.

But with the Mototune method it would last longer and have better performance, but have a higher risk of problems in the earlier period of being used.....make sence??......pros and cons for each.

[derek01raptor]

Woody, would u be so kind as to shift this thread to the General Discussion forum??

Cheers
d

[Woody_YZF]

It has been moved.

[Crazy]

I've just read alot of things about easy break-ins that steer me away from them, mainly power. I've also read that it can cause the rings to not seat properly and cause blowby early on in the engines life.

[MotoMan]

I follow the ride it hard theroy. Never had a problem with it. Just be sure it's warmed up properly, one thing that you should avoid when doing it though is sustained high rpm's, that I do not believe is such a good thing.

But other then that, ride it like you stole it.

[Jeff172]

I agree 100%. Ever since my days of building muscle cars (does that show my age? lol) we ran em like you were going to run them right from the rip. Always had great runners. A couple blew within the first 20 mins., but I'd rather have it happen right now, then when I'm depending on it later. Out of at least 25 motors car and bike, only had two blow that I can remember. I've had other buddies baby them on break in and have nothing but problems.

[MooseRacing552]

I run mine normal when i brake it in, but then again i never really run my engine hard in the bike becuase i just like crusing around in woods.

[derek01raptor]

Thanks Woody

[schwen_108]

i run them easy at first. than after about a good 15-25 min i ride harder, and harder , and harder. ect, ect.

[FMX Paul]

I'm with my buddy Jeff 172 on this one...
On the last race I was in, I had JUST done a piston and a clutch. I finished late, and the bike had never even been started until I took it to the track. I fired it up, and let it warm up, then cool down a little LOL (about 5 min) Put that sucker on the line, and WON that race. I put them together RIGHT, and run the living $hit out of them. Instantly.

[Riley_400]

Easy because I dont have the money to fix it when I break it trying to break it in fast.