MountainMax
Expert
- Joined
- Nov 21, 2004
- Messages
- 297
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- Location
- Churchill Falls, Labrador
- Country
- Canada
- Snowmobile
- 2009 Yamaha Apex
do you guys follow the break in guide in the manuals for your sleds? it says to let it warm up for 15 minutes before riding it and to generally take it easy on the sled right up to 800 miles i think for the first oil change. I like to break my machines in a bit hard on the gas, but just not hold it WOT for long periods of time, to really seat in the rings under pressure, and I was always told excessive idling is bad on break in, so why the long warm up periods..
tmk50
TY 4 Stroke Junkie
I rode mine 'normally' - I didn't do the 15 minute idle, but I let it warm up in the parking lot for 5-10 minutes before the first ride. I rode it on the trails for the first few trips - varied the throttle/RPMs and didn't hold it at WOT for more than a few seconds at a time.
Do some searches on this. You will see that everyone has a different opinion on it.
Do some searches on this. You will see that everyone has a different opinion on it.
MountainMax
Expert
- Joined
- Nov 21, 2004
- Messages
- 297
- Reaction score
- 0
- Points
- 741
- Location
- Churchill Falls, Labrador
- Country
- Canada
- Snowmobile
- 2009 Yamaha Apex
I know of all the different ways to do it, im just curious on what methods you guys used on your apex's....
GotJuice
Expert
I agree with your method
I've built many small block strokers from mild to wild on Alcohol and I never break an engine in easy! I let it idle for a few minutes then ride it hard on and off the throttle for varrying times loading the rings with pressure as you mentioned. Hard on and off for short bursts for the first 25 miles then ride it like you stole it from there on out. I've done this for 15 years and have NO oil burning problems! You have a minimal amount of time to seat the rings before the cross hatch is smooth in these cylinders and if you baby the engine they don't get enough pressure on the rings to seat them like they should be. I reframe from long high RPM holds for the first 250 miles. (long being more then 1/8 mile) This has been the practice of hundreds of the countries best engine builders for decades. The only instance where I hold a motor at a certain RPM for any period when it's new is to break in a hydraulic flat tappet cam and then it's 10 minutes at 2000 rpms, after that I hammer the piss out of it. If they're built properly this will NOT hurt and engine! hope this helped some how.....
>>MountainMax said:
I've built many small block strokers from mild to wild on Alcohol and I never break an engine in easy! I let it idle for a few minutes then ride it hard on and off the throttle for varrying times loading the rings with pressure as you mentioned. Hard on and off for short bursts for the first 25 miles then ride it like you stole it from there on out. I've done this for 15 years and have NO oil burning problems! You have a minimal amount of time to seat the rings before the cross hatch is smooth in these cylinders and if you baby the engine they don't get enough pressure on the rings to seat them like they should be. I reframe from long high RPM holds for the first 250 miles. (long being more then 1/8 mile) This has been the practice of hundreds of the countries best engine builders for decades. The only instance where I hold a motor at a certain RPM for any period when it's new is to break in a hydraulic flat tappet cam and then it's 10 minutes at 2000 rpms, after that I hammer the piss out of it. If they're built properly this will NOT hurt and engine! hope this helped some how.....
GotJuice
Expert
I agree with your method
oops..sorry for the double click...LOL.
>>MountainMax said:
oops..sorry for the double click...LOL.
MountainMax
Expert
- Joined
- Nov 21, 2004
- Messages
- 297
- Reaction score
- 0
- Points
- 741
- Location
- Churchill Falls, Labrador
- Country
- Canada
- Snowmobile
- 2009 Yamaha Apex
Thanks again, this is how i broke in my 4 stroke bike too, never had much choice in my car though, the day i bought it I had to drive 240km to get home, so i tried to drop a gear down every now and then and vary speed a bit and stay away from cruise..... and I never had any issues, i was more curious on the 15 minute idle time the manual says......
2XM3
Extreme
Re: I agree with your method
I agree on the load, I owned a race shop for 25 years, put her on the dyno, warm up, 2-3 easy pulls to 6500, if all looks good the next one goes to redline under load. I would not hold it wide open for a while but short pulls are good for the rings. They either break or they don't.
GotJuice said:
I agree on the load, I owned a race shop for 25 years, put her on the dyno, warm up, 2-3 easy pulls to 6500, if all looks good the next one goes to redline under load. I would not hold it wide open for a while but short pulls are good for the rings. They either break or they don't.
