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How to break in your motor
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Posted by: beerock

This is for everyone trying to figure out what they really need to do to break there motor in correctly.
There are plenty of variances to this, there are also people that will say as soon as its built you can scream the motor right away, I dont believe in this procedure, you can glaze your bore doing that and score a piston. I know theres some guy on the internet with a site about running your motor hard right after being built. LOL

first do a compression test, if its over 185 psi you will need to run race gas. MY SUGESTION is to run AMSOIL dominator oil at 50:1 This is the best oil on the market in my opinion. If you want to run another brand thats great theres tons of good oils out there. Whatever oil you run make sure you consistantly mix it properly and try not to use other brand oils.(unless your in a pinch.

once you figure out your compression psi. mix the oil and fill your tank. dont eye up the oil use a ratio rite or use a maxima pre mix(what i use its great)

start it up and blip the throttle until the cylinder gets warm DONT ride it or put it in gear. Once the cylinder is warm to the touch shut her off and let it cool completely. do this 3 times.......

then ride it varying the throttle from 1/4 to 1/2 throttle then let it cool completely do this 3 times!!

after this ride it from 1/4 to 3/4 throttle then let it cool completely do this 3 times!!!

after that ride it from 1/4 to WOT, DO NOT HOLD IT WOT just constantly roll the throttle on and off, no abrupt throttle. do this 3 times with a cooling cycle in between each time.

after this you should be done with your tank of gas, fill it up and ride it gently for the next gas tank keep rolling the throttle on and off. after the second tank LET HER RIP!!!!!!!!!!

Posted by: QuadRacer041

thats tioo much work for me.
start it up let it run for a minute.
let it cool then go for it. its much quicker this way.

Posted by: GOTFEAR

Go to the track fire it up run the **** out of it. well in my case 1/2 a lap and seased it up so do some slow riding for about a 1/2 of a day i wnow thats hard two do man. all i wont two do is ripppppp the ****ttt out of it. YEHA

Posted by: ktmsxridr

pssh i just kick it and goooooo. thats the way to ride. lol. j\k

Posted by: GOTFEAR

Dont mind the radle just keep it throtled it will let you know when its time some times it goes squeeeeeiik

Posted by: beerock

quote:
Originally posted by GOTFEAR
Go to the track fire it up run the **** out of it. well in my case 1/2 a lap and seased it up so do some slow riding for about a 1/2 of a day i wnow thats hard two do man. all i wont two do is ripppppp the ****ttt out of it. YEHA

hmmm I wonder why it seized.

Proper break in is essential to a long running motor.

whether you guys are being sarcastic or not. thats the wrong way to do it so spare the sarcastc comments this is a informational thread, not a BS thread

Posted by: GOTFEAR

YEA it cost me $$$$$$$$$$$

Posted by: Eddiesanders250

quote:
Originally posted by GOTFEAR
YEA it cost me $$$$$$$$$$$

LOL I imagine next time you will do it the right way.

Posted by: dirtmomma

Good Info B

thats pretty much how we broke our blaster & it lasted a long time w/ some hard flattrack racing!!!!!!!!1

Posted by: 05400EXrydr

run three tanks of gas thru it then it should be good

Posted by: wicked265R

your dead on Beerock. Thats the same way i broke my R in and it ran like a champ but something happend where i got some sand or something in my motor and blew it up again lol.

Beerock knows what he's talking about and this is the best and most reliable way of breakin-in your motor. I don't recommend putting a new top end in and then tearing WOT through trails with it. Great Sticky!

Posted by: beerock

thanks man.

ive had my fair share of breakin motors in I also blew up an R mtoor once because I didnt follow my own procedure and glazed part of the cyl wall had a partial seize. and the mtoor ran after it but it had a very strange powerband, hod bottom, no mid and lots of top end. was strange. took the motor apart and figured out becaue of improper break in the pistin was not heating up uniformly because of the glazed wall and caused the strange power band.

Posted by: Mxjunkie

quote:
Originally posted by QuadRacer041
thats tioo much work for me.
start it up let it run for a minute.
let it cool then go for it. its much quicker this way.

Posted by: fmfracing5

yes very dead on, i dont do it exactly like you but pretty close, i just rode my bike very easy just bliping throttle coasting around most of the time not even on the throttle just blipping it for one day, then the next day doing a little bit more blipping, and keeping going up intill the 5th day and let her rip. break in process is very important, if you dont want to wait another 2 weeks, and spend another 300$ then break it in and be smart, beerock very good information you help alot man thanks.

Posted by: skinny410

You on the money with the break in process. I'm sure every person has there own little trick but overall i do the same and have a great success with all of my motors.. one tank of fuel with oil $20.00 you time free. Rebuilding your motor $$$$$

Posted by: peeping TOM

yer 5 hot and cooling down sessions are best ...but the main reason for nipping a 250r up is because the exhaust side ain;t been {relieved} correctly, or not at all...

Posted by: rrguy

Thats pretty close to all the methods I have seen. Even moto-man, the first one I saw who ignored the owners manual that tells you to ride 1/4 throttle how long? Has you warm it up & cycle it & go through the rpm range & load. Yet it will vary on material of rings & if you have a steel sleeve like most 250r, or a aftermarket which is plated. Some of these new 4 stroke motor have problems getting the rings to breakin. That is why others have came up with tricks of shortening the break in process even more. So I would not use one method for every motor type.

Posted by: Mcknight#5

is it true your not to use full synthtics for yout first tank of fuel?

Posted by: RIZZO

quote:
Originally posted by Mcknight#5
is it true your not to use full synthtics for yout first tank of fuel?

I would like to know if this is true too this was reccomended to me to use also for the breakin......I just got my motor back this friday...bike all back together saturday took it out sunday first time on it for the breakin and know back to where I was on thursday no motor and $ 900.00 in the hole. not a good weekend.

Posted by: RIZZO

I got my motor apart today.......and found out that my maine jet was too small making it run lean...wish I would have cought it sooner....I'll post some pics up of it soon.

Posted by: RIZZO

Here are some pics of the damage...

Posted by: RIZZO

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Posted by: 07250ex

i got a question what is WOT?

Posted by: Mcknight#5

wide open throttle

Posted by: rea

I have a ? I have a brand new motor new set up not sure if my jetting is correct im sure this would effect brake in if im trying to jet correctly and brake in the motor what would any of you suggest

Posted by: redrooster310r

run it rich for break in.... you want the mototr to polish those parts nice so when you jet in in later....the rings etc will be happily seated. read page 1 of this thread .....