So i was reading the articles linked in the wiki for engine break in. It say's to run it hard thru all rpms. Is this how it should be done?
So i was reading the articles linked in the wiki for engine break in. It say's to run it hard thru all rpms. Is this how it should be done?
There are many schools of thought here. I always just take it sort of easy for the first tank. Also try not to cruise at a steady rpm while you're at it. And mix 32:1
It is my first kit I have read lots about 2 strokes and mopeds for the past 6 months so we will see how it goes.
I hope you're supposed to just gun it all the time, because its hard for me to do anything else when there's all that awesome power there for the use. But I wouldn't do anything for too long at one time, you don't want to overheat it. Especially if your jetting isn't perfectly tuned yet.
so like short bursts of throttle
basicly...
and start with a jet you know will be hella rich and go down to the point when you 4 stroke at wfo (wide fucking up)
that will hopefully add to your knowledge... if not your welcome... you cant get this 30 seconds back)
Funny thing is, well I used to be finicky with my minarelli, breaking in and all...I put one of those treats for the people kits in my puch and just ran it like I stole it...never seized it or anything...DUMB luck
that is the kit I ordered
I thin once i get my kit on today im gunnna put the biggest jet i have in it and start it and let it run o the kick stand let it idle and alittle up from thier for about 10 min then take it out on the road and ride easy and adjust the jettin then after the first tank i will go a little faster but once it has about 5 tanks through it i will run it hard
just jet rich and blast. be careful for like the first 15 miles then just semi-careful if all is well. then go super fast. if you don't run it hard (ALL rpm's), the kit won't be ready for blasting later on.
If it breaks, fix it.
I alway's fix it
idle for 10 mins = bad....
remember, its AIR COOLED....ittl overheat just sittin there...
basically...you want to go easy on it, but you want to still GO..
32:1 synthetic is a good idea
overly rich jet is....well i guess you can, but considering how much oil is in there, shouldn't matter.
Warm it up briefly... no more then a minute or so on choke (assuming it is a nice 70-80 degree day out)
take the choke off and just start goin real easy on it. Go up to say, 20mph, go cruise to a stop, slowly go to 25, cruise to a stop, etc etc...This process really takes no more then 20 minutes and a few miles. After this you should still go easy, (don't stay at max throttle for more then a minute or so) but don't feel like you shouldn't go full throttle at all, that is actually counterproductive.
After that rich tank, do your normal jetting and oil mixing (if its GOOD synthetic is going to be somewhere between 40:1 and 60:1...i run 65:1 with motul)
None of this advice applies if you are using crappy oil.
-Shadow
I like what you said but. I thought you were not suppost to use synthetic oil during break in.
That's debatable too! I break in with non synthetic and take it super easy... With my new Malossi kit I'm going the synthetic route and following their break in procedure which is no more than 600 RPM for 40 minutes to an hour, then rip...
6000 RPM... My bad. Haha.
65:1 on Motul? On a kitted bike? That seems crazy to me. Don't you want _more_ oil than you would a stock engine? I mean Motul is great and it's the only thing I use... but 65:1 seems like not even close to enough.
the key to break in is high load and low speeds, run it hard, but dont let it wind out all the way, definitely dont let it run topped out right off. breaking in the rings is like sharpening a knife, you want to go steady with high pressure so the metal grinds into a perfect seal without overheating.
motul is quoted from the company that it will run double the ratio of nonsynthetic. eg. 32:1 which is fine for a kitted bike.
Breakins with synthetic work just fine, there used to be instructions from motul on how to use their oil during a breakin. It just means you have to go faster with it, but since its SYNTHETIC...there is less chance of getting damage to the engine, thus, i always use it to breakin.
It would be like eating hamburgers all week in practice for an ice cream eating contest.
-Shadow
I've been reading about breaking in hard a lot. My friends who build SAE cars swear by it, but most of the testimonials I've found are for 4-strokes. Does any one here have experience breaking in their new rebuilds hard? There might be some oversight that makes it not work as well for 2-strokes (like seize issues). Let's get our collective knowledge on!
i've heard both on here, but the guys i've talked to have ran their peds soft the first 100 miles or so, no seizure issues.
Ive broken & broken allot of engines in my time (few 2 strokes)
if the piston clearance is set up tight you want to not max out on the RPMs
you do want WOT Id say repeated solid pulls to 3/4 the total rev & maybe 2 times the oil for the first tank or 2 then swithch to the recommended mix & for the next tank or 2 you can bring it all the way up but just dont keep it there for a long time
I break in turbo engines designed for 15 lbs of boost at 20 PSI but keep the RPMs off the rev limit for the first day & then after a couple of days am bouncing it off the rev limit like its a shift indicator
the expanding gases enter the ring gap & push the ring out against the cylinder wall, thats how the seal is really made
so you dont cut the ring nearly as well if you are light on the throttle
keep the RPMs below 3/4 of the total & Id agree NEVER EVER break an engine or journal bearing turbo on synth nothing will seat & the engine or turbo will remain tight
this is just my opinion but I have been in the automotive trade for 26 years
you can check out my stuff at www.jakstollperformance.com
take care & good luck
JAK
^dont the rings just expand due to heat?
i like the idea of going out and running it lightly up to half throttle, getting it up to heat. then letting it cool down. do the same thing again but up to 3/4 throttle. and again to WOT.
The master told me if you just squirt a little oil down the plug hole and run a little rich and just run it through 2 or 3 warm up/cool down cycles you can rip whatever after that. I didn't really believe him, so I did it a super cautious way 1/4throttle at 25:1 non synthetic for a tank, 32:1 after that and never WOT for more than 10 seconds at a time. I'm sure I will get over it, but I just want to baby it for a while.
I ran mine pretty hard. but I didn't run it full for very long. What jak said.
Thank Jak. That make a lot of sense. You want lots of pressure on the rings to seat them properly, but you don't want the RPMs too high because that's seizing territory. Probably the first 2 miles is all I'll get to seat them since my K-Star kit came with a so-so crosshatch on the cylinder walls.
as you can see there are so many schools of thought. Do whatever you feel works for you. Just be sure you are running rich with dino oil and you are good to go.
I personally do a few heat cycles on the stand just to let everything settle in. I do this especially after full rebuilds. On the stand I let it idle a bit then rev the engine. After doing this a few times and letting it cool down. I take it on a short ride and run the shit out of it but no full throttle. I'll do this a couple times and a gas tank later, finally go WOT with full pulls throughout the powerband.
this is debated between just about all engine mechanics. some say let it idle for a while others say go 50% then 60 and so on till u r maxing out spending an hour in each there r tons of theories.
i babied mine going through all rpm ranges, the first 2 miles probably not even that long. after that i have run wot all the time as it is just the stock cylinder with new rings and its that or get run over.
p.s for how many miles should i break in my bike?
I think 100-200 is considered mostly broken in. I could be wrong though, and once again, it depeneds on who you ask.
In my experience, the ring(s) sets after 50 miles or so. After that, there's no sense in babying it anymore. You'll know when the ring sets, as your idle will magically change, and a downjet will become more obvious.
Dude, for about the first 500 miles, dont gun it. Thats retarded. The better you break it in, the faster it goes in the long run. Take your time, try not to go over 25 mph, and if you want to open it up, do it only for about a few minutes.
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