How to Break in a Rebuilt ATV Engine | Breaking in a Rebuilt Motorcycle Engine | Partzilla.com

Breaking in an ATV engine? There are a few things you need to know about slowly working the parts of your engine into shape before you really put it through its paces. In this video, John will show you how to break in a rebuilt motorcycle engine or ATV engine. We’ll give you some insight into what oil you should put in a rebuilt engine and show you how to ride those first few miles so you can properly get those pieces wearing in together.
Want to see us rebuild the top end on a Honda Rancher 350? Start here as we take it apart:
• Honda Rancher 350 Top ...
During the break-in process, you’ll need to change the oil. Here’s how to change the oil in your ATV:
• Honda Rancher 350 Oil ...
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[@rubenparedesjr3412]

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.

[@StocksFarm]

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.

[@thehappytexan]

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.

[@fidelcatsro6948]

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

[@PartzillaParts]

No need to baby it. Just don't race it at first.

[@jeffreyhinman1397]

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.

[@wags9777]

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

[@GY6-SCOOTERS]

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

[@shanevonharten3100]

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

[@troy6781]

I truly appreciate you making videos like this.

[@troymattingly3071]

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

[@1979gmcummmins]

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

[@bradhey]

Nice, practical advice.

[@aaronpeck4224]

Very helpful thank you!

[@probegt75]

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

[@connersnow298]

Awesome vid

[@jasonmilam9930]

I agree!

[@marpip01]

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 ?

[@nickpgre]

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!

[@KenpachiZarakiX]

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

[@dancoffin9860]

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

[@jholton3689]

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

[@kerm9807]

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

[@justinw523]

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

[@jacobthiessen6917]

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?

[@mikem04rubi]

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

[@pattayakamagra8325]

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?

[@flagstamp]

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.

[@jonshoemaker2520]

Shovelhead pretty expensive and rare engine my uncle had a few when I was growing up bad ass machine!

[@cibuliux]

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.

[@jaspermiller7769]

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

[@hunterphipps5875]

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

[@hunterphipps5875]

On a 2017 yz250f

[@christopherlitton696]

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

[@elcabezon85]

I'm doing the same on my 02 trx350tm is my first time doing this i hope everything work good for me

[@christopherlitton696]

@@elcabezon85 good luck

[@MrStrongpack]

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?

[@darrenbashby]

I do not think the ring gap should change by bore size. The rings should be gapped to manufacturer spec. If you are using factory rings stick to their spec regardless of bore. Same would go for aftermarket rings. If the recommended gap is 0045, that is what you need.

[@mikecochrane2074]

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

[@rxsend9944]

I’ve replaced my 400 ex piston and head and when I turned it on it smoked for 5 min after a while it stopped,it was also a lot of smoke but after 10 min the smoke stopped

[@michaelfletcher3813]

@@rxsend9944 I know this is a late reply but sometimes oil will build up inside the header and the exhaust. Even after the rebuild some people don’t even think to clean them out, but the oil will need to burn out of them as well.

[@terryhopkins8059]

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

[@doctawhite274]

Does this still account for 2 strokes?

[@douglasbunn166]

So when's the video about oil preferences for Honda

[@janvirachas1708]

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

[@crazylife6319]

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?

[@frankiemarchese2978]

You want to run conventional first not synthetic. If youre just doing rings I would dump the coventional oil after the first 20 mins or riding. And then put whatever you want in and ride it like you stole it.

[@ezraconner875]

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

[@gogorome456]

No it’s oil. You will be fine

[@sultanmehmoodghaznavi6312]

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.

[@mrbmd710]

As long as you're done with the babying it now. These motors are design to take semi abuse.

[@alexx_97]

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

[@mikem04rubi]

Somebody asked that, he said engine break in is the same for rebuild versus brand new.

[@DavidGarcia-jf7nj]

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?

[@jesusjacobo1156]

Yep

[@georgehuffert5157]

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.

[@gloriouschannel3683]

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.

[@chriscs9080]

Warm it up and then take a small 15 minutes ride at normal rpm . Let it cool down . Repeat again with running it harder . Repeat again run it like you stole it.

[@hughbatchelor8599]

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

[@TwistedTeej]

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..

[@jmagz2749]

sayang di ka nya nasagot

[@mrbmd710]

Just ride it normal push it 80 percent once in awhile.

[@elcabezon85]

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

[@koltonspurlin8416]

As long as the cylinder wall is not scratched

[@elcabezon85]

@@koltonspurlin8416 not at all everything looks really good, no scratch

[@patrickwilliams9611]

your stock cylinder will need honing to de glaze the bore if its nikasil then you will have a tougher time as you will need a diamond hone

[@scottsheffield2594]

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.

[@cloudyskyforever2553]

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!

[@PartzillaParts]

Break in is for any rebuild or new motor

[@falconator3419]

Same process for a 49cc 4 stroke scooter?

[@malandro2023]

Same bro, ride it like you're running away from zombies running at 59Mph!!!

[@canadianamerican90]

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

[@danielg4717]

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

[@lukeriley5480]

Yes

[@davidpalmer287]

20 hours. Jesus i change my oil every 3 rides, i believe that is key in getting the most out of these engines plus always having a clean air filter. Thats just my opinion though

[@holywoodyamaha22]

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

[@oscarlopez3217]

Hey man I have the same bike with a built motor and I've always ran Pro Honda HP4 (the gold bottle in the video) that stuff works great!

[@_honda_trxfm]

What do you mean by running hard

[@danielkerr4100]

It's pretty obvious he meant no full throttling and racing it, that kinda hard

[@elchorizo1850]

What happens if you don’t break it in

[@frank.l181]

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.

[@lesleyroof6168]

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.

[@PartzillaParts]

It's possible the rings weren't aligned properly or didn't seat.

[@jeffduran8461]

It may have dumped lots oil in your exhaust system or muffler what I ment to say maybe take muffler and pipes off and clean up with gas . Are you losing a lot of oil since you changed the rings if your not then like i said exhaust saturated with oil .and so forth

[@Billy-Boggs]

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

[@mrbmd710]

Do a variety of loads each strain moves the piston a slightly different way.

[@mikeatv]

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

[@ma-mo6xn]

I agree completely … I disagree with running her hard out the box … Manual says to baby it for 300 miles on my Honda 450rl

[@charliekirsch8051]

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

[@chain.driven]

I made the same mistake, so eager to to see if it would even start not thinking about brake in procedure. 2-3 heat cycles of about 5 min each, each mostly at idle 🥺. (I didn’t even have wheels on my bike) About to do my first real ride and hoping the rings will sill seat. So how did yours do? Everything work out in the end?

[@proximap2151]

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

[@fidelcatsro6948]

even my bike manual recommended to use conventional oil for running in...

[@PartzillaParts]

I'm not aware of any new unit that comes with synthetic oil. If so, perhaps they already broke in the motor.

[@benzinz_4821]

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

[@brandonhackney5574]

Paul bunion

[@maddoxbuzzeo8288]

Wheeler won’t start with fresh rebuild

[@gusbees2052]

Did u check timing?

[@fzm_aktaystunt6311]

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

[@PartzillaParts]

There is a transcript of the words, you are welcome to translate it from there.

[@SchecterMongoose]

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.

[@chriscs9080]

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 !

[@jameshawkins3484]

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

[@bengress3071]

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.