Yz250 manual says to mix twice as much oil into your gas for the initial 3 break in heat cycles. Which is 15:1 if your using yamalube. Manual also says 5-8 minutes each. 1st cycle: light load short mid throttle openings. 2nd cycle mid throttle blips under load. 3rd cycle some full throttle/higher gear under load for short duration only. 1 hour of use before breaking in is complete. No heavy wide open for long duration during break in.
i have a 50cc 2 stroke scooter that i recently did a rebuild on but i cant mix more oil because it has a oil pump i adjusted the fuel mix to be rich for the break in period so it lubricates more is that enough or should i mix some oil into the gas too?
@@frodo4087you should take off the oil pump and premix, just worked on a 50cc moped and the engine was destroyed because the oil pump drive sheared off
Here in india we have 100-135 cc two strokes from suzuki and yamahas.. these two brands are predominant. These are aircooled single cylinder and for the yamaha 135cc the company recommend to ride the bike below 4k rpm for 1500kms. These numbers are absurd comparing to what the mordern age two stroke bikes run in is followed. And the piston to liner clearance is around 30-32 microns.
thanks. few months ago found a very rare Suzuki 100cc dirt bike 8 hrs. away from home. with the Suzuki ax100 engine sold to a dirt bike company named "Motorized fun company" that was sold to the Canadian market in 1997-2000ish. someone sold it to me for 100 dollars which is extremely cheap but i had to rebuild the motor which was about 144 dollar because it was missing the stator cover so the clutch wouldn't engage which was most expensive part. I'm pretty sure i have one of the last ones in Canada no one known what they were and thrown them all out probably 15 yrs ago, once they needed parts. pretty sad
It’s really hard to measure in kilometers on a dirt bike, so if you can, just measure in hours. Even if your bike doesn’t have an hour meter, you can set a timer on your phone every time you ride until you get 3-5hrs in. Then the break in period is over🤘
Usually I Breakin with rich AFR for 3 cycles. Idiling for 1 litres. 2nd idiling in 1500rpm for 1 litres. Optimum mix for final 1 litres. Its my opinion for a beginner breaking technique. Oil mix is 3 times the optimum mix.
Yz250 manual says to mix twice as much oil into your gas for the initial 3 break in heat cycles. Which is 15:1 if your using yamalube. Manual also says 5-8 minutes each. 1st cycle: light load short mid throttle openings. 2nd cycle mid throttle blips under load. 3rd cycle some full throttle/higher gear under load for short duration only. 1 hour of use before breaking in is complete. No heavy wide open for long duration during break in.
The best technique would definitely be in the owners manual. I might try that next time🤔
i have a 50cc 2 stroke scooter that i recently did a rebuild on
but i cant mix more oil because it has a oil pump
i adjusted the fuel mix to be rich for the break in period so it lubricates more
is that enough or should i mix some oil into the gas too?
Yes, mix some oil into the gas.
@@frodo4087you should take off the oil pump and premix, just worked on a 50cc moped and the engine was destroyed because the oil pump drive sheared off
Put a face mask over your air box filter too so you’re dirtbike doesn’t catch the covid
Your process is fine. Proper jetting and full warm ups ate just as important.
I’m WOT, straight from the dealership. 😂
This helped so much I was so confused on hour to do this
Awesome I'm glad this video could help🤘
Nice video champ..
Good tutorial...thanx
Glad you enjoyed!
Never done heat cycles only thing have done is glaze cylinder and first start up have took it on a normal ride never had a problem and lasted normal
Great video buddy, continue making videos!
This was help full, I'm currently braking in a 2 stroke street bike. Aprilia RS 125 :).
Nice man! I hope it helps🤘
My KTM 250xc-w is street legal
Here in india we have 100-135 cc two strokes from suzuki and yamahas.. these two brands are predominant. These are aircooled single cylinder and for the yamaha 135cc the company recommend to ride the bike below 4k rpm for 1500kms. These numbers are absurd comparing to what the mordern age two stroke bikes run in is followed. And the piston to liner clearance is around 30-32 microns.
That’s interesting 🤔 I’ve never had any experience around bikes like that
thanks. few months ago found a very rare Suzuki 100cc dirt bike 8 hrs. away from home. with the Suzuki ax100 engine sold to a dirt bike company named "Motorized fun company" that was sold to the Canadian market in 1997-2000ish. someone sold it to me for 100 dollars which is extremely cheap but i had to rebuild the motor which was about 144 dollar because it was missing the stator cover so the clutch wouldn't engage which was most expensive part. I'm pretty sure i have one of the last ones in Canada no one known what they were and thrown them all out probably 15 yrs ago, once they needed parts. pretty sad
Thank you for this video! Do you let the bike coop down between runs ?
No problem! I don’t. I do the runs all at once
How long for cool down? In warm conditions lol
The last time I rebuilt it (in the summer) It seems like it took 1-2hrs to completely cool down between cycles
Was the engine braking part of the break in?
you seem to know a lot about two sroke engines yet you still dont pull the clucth while coasting?
Only if it’s really high rpm’s🤷♂️
Mixed feelings on this comment. Low speed doesn't really matter, but fast coasting will starve bearings and rings of oil.
I wanna trust you but , you have shorts on in the winter 😆 lol jk. Thanks for the video
You make a good point there😂
How many kilometers, i should main tain the break in period...
It’s really hard to measure in kilometers on a dirt bike, so if you can, just measure in hours. Even if your bike doesn’t have an hour meter, you can set a timer on your phone every time you ride until you get 3-5hrs in. Then the break in period is over🤘
Do u use the choke?
Only if I need to in order to get it started🤷♂
Usually I Breakin with rich AFR for 3 cycles. Idiling for 1 litres. 2nd idiling in 1500rpm for 1 litres. Optimum mix for final 1 litres. Its my opinion for a beginner breaking technique. Oil mix is 3 times the optimum mix.
very bad idea to idle break in
which break in 2-stroke oil to use?
Redline
I didn't break in a 2022 husqvarna tc125 and it lasted a total of 16 minutes in one drive lol
You never leave a 2 stroke idling that long. You will foul plug, power valve and muffler packing.
My bike blew up at 28 hours
Any engine should be broken in to have the parts mate to each other it makes no sense to skip this step if you want a reliable engine
Just rip it from new makes no difference changing amount of oil in mix 😂
Your bikes definitely don’t last that long with all that engine breaking
You dont
Haha