break in new sled

[bluesnowman]

Hey guys! new to this site. Just bought a 07 nytro. What's the best way to break it in. I always believed you should break it in how you always ride, don't baby it.(except top end). Thanks! bluesnowman.

 

[sledheadgeorge]

Here you go.

http://www.mototuneusa.com/break_in_secrets.htm

 

[bluesnowman]

Thanks for the info. learned new info. bluesnowman

 

[LazyBastard]

Do NOT follow that link. It will tell you a great way to shorten the life of your engine. That guy is a sleazy mechanic trying to generate business by destroying engines. Unfortunately, what he wrote is long, so the misinformed believe what he says without understanding whats really going on during breakin.

On the other hand, the BOOK THAT CAME WITH YOUR SLED is written by the manufacturer, who is trying to generate product loyalty.

Note: The book does NOT say "baby it". It says to vary the throttle continuously THROUGHOUT the range while limiting the length of time its running hard - this is to dissipate the HEAT that builds up in the engine - during breakin, you have UNEVEN INTERNAL TEMPERATURES, so just because the sensor doesn't detect overheat condition, doesn't mean that some part is not overheated.

The manual also says to LET IT IDLE for a while before driving it. This (contrary to motune) is very important since it is the time of an engines life when there is the GREATEST FRICTION. Friction causes heat and heat causes DAMAGE. Keep it running at IDLE to reduce and dissipate the heat.


Finally.... the "break it in like you're going to ride it" theory. Complete B.S. The engine does NOT conform to your riding style. The engine TURNS at different speeds and generating different amounts of torque. Thats all.

 

[RedRocket]

I'm with LazyBastard, that guy is a moron and should never build engines. I have seen that paged linked to other forums. You will be burning oil within 1000 miles. Follow the book and just vary the rpms constantly and don't exceed the recommended rpms for the first 1,000 miles. Also, change the oil every 500 miles or 3 months.

 

[LazyBastard]

Uh... DO exceed the recommended rpms, just not for EXCESSIVELY LONG - ie short bursts and provide cool-down time between. The book does NOT say NOT to go over those rpms. It basically means to AVERAGE no more than.

 

[sledheadgeorge]

Don't know about you guys, but I have not had any problems breaking in motors that way. No oil burners in my stable.

 

[Sled Dog]

I broke mine in like I was going to ride it just varied the throttle and speed lots. Both do not use any oil or any problems. Did not baby them by no means you have to make them work just not a steady work.

 

[kinger]

Yeah I do not know how to ride a snowmobile WITHOUT varying the speed, they don't have cruise. When you get a chance to open her up just get it hold for 1-2 seconds and back off (pretend its a 2 stroke) Then after 300 miles go like stink.

 

[1CrazySledder]

Hey guys! new to this site. Just bought a 07 nytro. What's the best way to break it in. I always believed you should break it in how you always ride, don't baby it.(except top end). Thanks! bluesnowman.

Welcome to TY. An awful lot of info here. You can also use the search option at the top of the page. There have been many posts on this topic. Here are a few....

http://www.ty4stroke.com/viewtopic.php? ... ight=break

http://www.ty4stroke.com/viewtopic.php? ... ht=breakin

http://www.ty4stroke.com/viewtopic.php? ... ht=breakin

You'll find that we all break in our motors a bit differant, but the concept is the same. I varied my RPM's getting to the lake on the trail, then drag raced my Attak. It runs strong. No oil burning or anything. But that me.

-1CS


BTW: Please take a moment to update your profile with your location as this is a site requirement.

Thanks

 

[rightarm]

Do NOT follow that link. It will tell you a great way to shorten the life of your engine. That guy is a sleazy mechanic trying to generate business by destroying engines. Unfortunately, what he wrote is long, so the misinformed believe what he says without understanding whats really going on during breakin.

On the other hand, the BOOK THAT CAME WITH YOUR SLED is written by the manufacturer, who is trying to generate product loyalty.

Note: The book does NOT say "baby it". It says to vary the throttle continuously THROUGHOUT the range while limiting the length of time its running hard - this is to dissipate the HEAT that builds up in the engine - during breakin, you have UNEVEN INTERNAL TEMPERATURES, so just because the sensor doesn't detect overheat condition, doesn't mean that some part is not overheated.
The manual also says to LET IT IDLE for a while before driving it. This (contrary to motune) is very important since it is the time of an engines life when there is the GREATEST FRICTION. Friction causes heat and heat causes DAMAGE. Keep it running at IDLE to reduce and dissipate the heat.


I have to agree with LB sorry guys By the book(Yamaha)heat cycle,varying rpm,cool down breaks,and no prolonged WOT until recommended KMS.

 

[99SRX700]

Does anyone have any concrete proof of an engine failing due to improper break in? The only thing I have heard was engines burning oil because the throttle was not varied enough. Last time I posted my take on this I got harped on but I know a lot of engine builders in the car and marine industry as well as a few in the bike industry and they all say this article is right. Just don't hold it open for more than a few seconds and you'll be fine. For those who say this is a myth to get people to blow their engines so engine builders will have more business, that sounds kind of elaborate to me. Two of the builders I know are not in the business anymore, and not only do they still stand by this method, this is the method they follow on their own stuff. I wouldn't worry about it, just make sure you give the throttle a few short hard wacks here and there. As far as the book written by the manufacturer, they say what they say to cover their butts in the event that something does go wrong in the first few miles. Anyone who has had to fight for warranty coverage will agree with that.

 

[rightarm]

You cannot compare Marine and Car motors to this one different build materials and broader rev range,as well as a higher sustained rpm operation.

 

[sledheadgeorge]

I've also broke in all my bikes trucks and cars this way. My father who was one of the top wernches back in the day taught me basically the same thing. Just my opinion, my experience.

 

[JDMCRX]

I found the best way was to start up ur motor let it run bleed coolant. Then change the oil and go for a run allow it to warm up and do a few WOT throtle runs to seat your rings. Believe me ive seen a few cars and trucks and sleds that were babied and they had to change there rings. Im not saying go out and beat the piss out of it but hammer it a few time get some km on it then slap some new oil in it.

Josh