Break in problem rebuilt motor?

stone881
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stone881
Edited Date/Time 9/23/2022 9:19pm
What break in oil are you guys using?

I just rebuilt my Sxf motor and used a non synthentic10-50, but not "break in oil". The bike runs well, I have an hour on it now, but am seeing some white smoke from the head breather hose and thinking the rings didn't seal properly.
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Factor E
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Factor E 9/23/2022 5:53am
9/23/2022 5:53am
More time for rings seat
Keep using non synthetic
stone881
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stone881 9/23/2022 6:52am
9/23/2022 6:52am
Factor E wrote:
More time for rings seat
Keep using non synthetic
I had always thought that the rings should seat within the first heat cycle or 2. Should I not be concerned that there is an hour of run time on it and they don't seem to be seated yet?
Skerby
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Skerby 9/23/2022 7:59am
9/23/2022 7:59am
You need to run that thing hard to make the rings seat.
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Rider 5280
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Rider 5280 9/23/2022 8:58am
9/23/2022 8:58am Edited Date/Time 9/23/2022 9:02am
I have NO IDEA if this will work, but what I am trying to do is "recover" some engines that were broken in lightly that also did not get perfect ring seal.

My plan is this:

(1) Run a fresh tank of fuel, with a heavy dosage of Yamaha Ring Free Plus (as a way to break any ring glaze that has developed and is preventing proper ring seating):
https://www.shopyamaha.com/product/details/ring-free-plus?ls=yamaha-mot…

(2) When running this fuel mix, load the engine hard like I normally would have during a proper break-in

Again, I could be a quack, but it's what I am going to try.

(and FWIW, I think I've already noticed power improvement in 1 bike I started running it in)
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Rickyisms 9/23/2022 9:24am
9/23/2022 9:24am
Rider 5280 wrote:
I have [b]NO IDEA[/b] if this will work, but what I am trying to do is "recover" some engines that were broken in lightly that also...
I have NO IDEA if this will work, but what I am trying to do is "recover" some engines that were broken in lightly that also did not get perfect ring seal.

My plan is this:

(1) Run a fresh tank of fuel, with a heavy dosage of Yamaha Ring Free Plus (as a way to break any ring glaze that has developed and is preventing proper ring seating):
https://www.shopyamaha.com/product/details/ring-free-plus?ls=yamaha-mot…

(2) When running this fuel mix, load the engine hard like I normally would have during a proper break-in

Again, I could be a quack, but it's what I am going to try.

(and FWIW, I think I've already noticed power improvement in 1 bike I started running it in)
That Yamalube stuff is the real deal, we used it a ton when I worked at a shop.
stone881
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stone881 9/23/2022 12:31pm
9/23/2022 12:31pm
Rider 5280 wrote:
I have [b]NO IDEA[/b] if this will work, but what I am trying to do is "recover" some engines that were broken in lightly that also...
I have NO IDEA if this will work, but what I am trying to do is "recover" some engines that were broken in lightly that also did not get perfect ring seal.

My plan is this:

(1) Run a fresh tank of fuel, with a heavy dosage of Yamaha Ring Free Plus (as a way to break any ring glaze that has developed and is preventing proper ring seating):
https://www.shopyamaha.com/product/details/ring-free-plus?ls=yamaha-mot…

(2) When running this fuel mix, load the engine hard like I normally would have during a proper break-in

Again, I could be a quack, but it's what I am going to try.

(and FWIW, I think I've already noticed power improvement in 1 bike I started running it in)
I will try it and see what happens. Thanks for the suggestion!
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stone881
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stone881 9/23/2022 8:35pm
9/23/2022 8:35pm
I just added some RIng Free Plus to my gas and put on another hour. The bike runs great, no issues, but still white "smoke" coming out of the breather off the head. No oil coming out of the breather, and no smoke from exhaust either.

It seemed like it was running a bit hot, but not so hot that I had any coolant overflow.

Maybe I am worried about nothing? I have read that it takes a couple of hours for the water vapor to completely leave the motor, but I live in the desert? Valve seal?
Factor E
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Factor E 9/23/2022 11:30pm
9/23/2022 11:30pm Edited Date/Time 9/23/2022 11:41pm
How much assembly lube did you use?
How many hrs before rebuild?
stone881
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stone881 9/24/2022 10:55am
9/24/2022 10:55am
Factor E wrote:
How much assembly lube did you use?
How many hrs before rebuild?
I used a light amount of motor oil for assembly.

Its a newly rebuilt bottom end that about 50 hours and the top end which is modded for 270 jug/piston has about 100 total hours.

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