I was told by an old man I knew, you baby a new engine and take it soft, you will have a soft ass motor. If you ride it and are hard on it you will have a hard ass, tough engine. It took me a while to understand that.

Followed a procedure similar to this one breaking in my 2016 Africa Twin. At 20k miles now it burn no oil and runs like a striped ass ape. Oil life seems to be good too still has decent viscosity and minor contamination between intervals. Clear and slightly dark like "tea color" but never black or cloudy. Great video.

Wow this was a surprise answer i wasnt expecting at all! No babying at all!

I completely agree with your recommendations. From small engines to class 8 diesel truck engines I built as a professional tech, my first step was to heat cycle it twice. Verify no leaks while heat cycling. Then take it out and drive it like you stole it. Especially in a semi or a pick up truck in my opinion. Those engines should be happy at wot from day one.

No mechanical issues that need to be addressed immediately. All mechanical issues should be addressed immediately. Nice video, also lots of engine braking will help seat the rings. Also they say to run them hard, and to run it how you’ll run it so it’ll break in according to those conditions it will be in most of its useful life.

I enjoy videos and advise from people that should be giving advice on KZfaq. You make cents and this confirms advise I have received from other experienced mechanics. Thank you

Ride it like you stole it. Service and maintenance is what gives you longevity

I just purchased a brand new icebear Hawkeye 150cc scooter I've been searching the web for break in info , i came across your video here and watched it all i really appreciate your support and detailed information you shared with us I'm gonna do as you recommend on this video thanks mate

I used to race stock cars and this is what my engine builder recommended

I don't know if one way is better than the other but his procedure is logical and kinda makes sense

Thank you.I agree with your views. This video is very helpful!

What about just changing the filter after say one hour of use ? Then changing the oil to whatever you are using after 20-25 hours ?

I truly appreciate you making videos like this.

I just broke in a shovelhead rebuild the old fashioned way..."take it easy, don't over rev it, shut er down and grab a beer, etc". How about scored cylinders and burning oil after 300 miles? I'm trying it your way after I'm done with the re-rebuild.

Would half throttle work cause that’s how I been running my new rebuild

After rebuilding my grizzly 700 tried the break in procedure as mentioned but after 1500km I got crack in cylinder :( . Im still wondering what can be the cause for the crack. It was aftermarket not OEM cylinder so maybe that's the reason, hard to tell.

Wow. So would this go for a brand new engine ? Not just a rebuild? I have a new 2022 Yamaha Grizzly

Hello, I'm about to purchase a new 23 Honda Goldwing. How would you recommend the break in procedure for that motorcycle?

I agree!

Should you break in with it stock or go ahead and throw your after exhaust and tuner on a efi machine?

I have a 95mm bore. Converted to inches is 3.74 inches. My application requires the high performance street strip guide from the ring gap chart(.0045") for the top ring and(.0050") for the second ring. When I multiply those numbers by my bore size I come up with 0.01683 for the top ring and 0.187 for the second ring. What do you recommend I set the ring gap to according to those numbers?

I am in the process of rebuilding my top end on my exc. I wonder If i should run instead of a 10-50w conventional oil to something thinner for the first 20 minutes like 15-40w before getting back to conventional oil of 15-50w and then to the synthetic oil i usually use. Btw. Thanks for the great info!

Will this procedure work the same for a brand new atv?

Very helpful thank you!

Thank you for this important information. I replaced my cylinder with a new cylinder/piston and ring kit. I gapped my rings to spec. Offset the top and 2nd ring as required. Upon running it, it started to smoke a couple of minutes in and continued to smoke. Will the new rings allow it to smoke until the are seated correctly? I also replaced the the valve seals. Thanks

Nice, practical advice.

Hi if i have new piston and cylinder and install it and break it in.. And after 2 weeks of driving need to reopen the cylinder... Do i need to put new piston rings again?

What is a conventional oil for a 2020 Polaris 850 5w50? Rotela maybe? I use it in my motor bikes.

So when's the video about oil preferences for Honda

Partzilla what about a 2-stroke Yamaha blaster with a fresh top end?

Thanks I was thinking about rebuilding my 01 350 rancher I already got a new head for it maybe this will help some in the long run I had a rebuilt 400 foreman I ran it hard after the 30min run time and didn’t change the oil for a month at a time it smoked again after a month everytime it was rebuilt about 3 times before I got rid of it

Awesome thanks! This is pretty much what I did with my motorcycle.

Manufactures say "baby" the engine for the first 6 months to 1 year because that's the time it's under factory warranty .

i change my motorcycle block and my mechanic said wait 1 week and after 1 week you can rip your motorcyce cuz to set the block properly

Hey they John After brake in on a suzuki ozark 250cc atv would you recommend semi or fully synthetic oil?

Hey, I'm trying to order the big bore kit for my 06 yfz 450 but its not letting me add it to cart. Just wondering if you know how to fix that?

Awesome vid

beating the fuck out of a new motor is no way the right thing the best thing to do is follow what the manufacture says in my opinion changing the oil sooner is the only thing that is proven to be 100% correct jmo

John, do you know of any engine stands made specifically for a four wheeler? Rebuilding a Yamaha Grizzly 600 and would like to find an engine stand. God Bless Jasper

Does this still account for 2 strokes?

What should be done if it already has synthetic oil in it drain it and add conventional oil only has less than 10 minutes on it.

Don't idle very long. Don't redline it. Be careful not to lung he motor being the wrong gear. Keep the R.P.M constantly moving.

Hi John. We have a 2006 Honda Rincon TRX 680 that sometimes revs up with little forward motion when in gear while at the same time at idle, even with the torque converter solenoid manually switched off the bike will creep forward or backwards. With the same solenoid turned off it still also grates into forward or reverse. Any ideas?? Many thanks. Cheers. Hugh

What happens if you don’t break it in

I left my oil in for 20 hours before doing the service on it, its what the dealer told me. Is it bad ?

Can I use my stock cylinder,I'm performance a piston,rings and valve seals upgrade ?

my question is to what extent of rebuilt is it safe to put conventional after running synthetic? if im just replacing rings, should i do this?

Everyone breaks in there bikes in different usually what I do with quad or dirt bike with a new cam I’m on the throttle around 2,000 rmps and hold it for 3 minutes and then let it cool down for 3 min and repeat the process till you get to 15 min total

What if I run synthetic on the first oil change cuz I didn’t knw to run conventional Do I dump it and start with conventional or stay with synthetic?

Sir can you help me.. ill be using a new piston with the same size as my stock.. but this piston is just cast.. i do speed runs throughout my videos.. i just want to get an insight as i often get information that cast piston are easy to break if you dont break it in properly.. im using a 155cc scooter in the philippines i hope you can notice this comment.. take care..

by doing this piston starts giving smoke. I had a bad experience. I recently built an engine a day ago. I ran few kilometres on it like hardly hundred but I'm very very gentle with it as my mechanic strictly instructed. what you say is completely opposite. any advise? its a 200cc engine.

if you accidentally put semi synthetic in after rebuild and run it will it hurt if you drain it and replace with conventional?

My mechanic installed a new piston. He told me i can't go more then 5,6k rpms. And can't go on the highway yet. Its a yamaha r125 (180cc). And yes im kinda babying it. What do i do im confused now.

I have a 06 ltr 450. What oil do you recommend? It's between suzukis ecstar and yamalube 10w40.

Same process for a 49cc 4 stroke scooter?

What do you mean by running hard

Just to say i use synthetic during a top end brake in. The fact that you should use conventional oil during brake in might be true 50 years ago but now modern engine oil companies have all but eliminated this problem in their engine oils

When you say conventional oil do you mean regular atv oil? I bought ATV oil 10w40 that I plan on using and was going to use this for the break in also. I just want to confirm for my break in after replacing the rings.

Running a new engine hard is not a good idea. It's more than just seating rings. Your temp cycling all the little parts. Do what the manufacturer says.

Hello sir, thank you for this video. May I please ask if the same procedures can be applied for a brand new motorcycle from the dealership? I have used the hard break in method (varied the RPM across the entire RPM , downshifted for negative pressure, etc.) so I was wondering if that method could have done any damage to my new motorcycle. Thank you!

My 400ex just spent the first 20 minutes of its life idling 😬 I should have watched this first

Paul bunion

I recently replaced my cylinder, piston and rings, as well as cylinder head on my 06 rancher 350 due to a cousin sinking it and causing it to smoke profusely. After installing all of the new components, it still smokes extremely bad. Any advice would be greatly appreciated as I am at wits end.

Wheeler won’t start with fresh rebuild

What about a brand new atv that comes with full synthetic oil??

You are telling that you should not use semi synthetic when Honda and motul recommend even full synthetic even on a new engine .. I don't get it ! Even new motorcycle come with synthetic from the factory !

Good day, I’ve been subscribed to your channel long ago, but I don’t understand what it’s all about, could you translate the video into Russian or write words from below so that I understand it

Sound info here, why baby your fresh engine. It's only losing power with every hour.

Wish there were some scientific evidence rather than opinions. Surprised since it is Partzilla. Will not be following because you basically just said ride like normal and change the oil more. Wish you’d make useful content rather than clickbait garbage.