A LOT of blowby smoke after engine rebuild

[49er]

Thanks man. I got to 200 miles and just couldn't stand to keep it under 6K rpm's any more. So yeah, I've been twisting the throttle as much as I can get away with. My paranoia stems from the "fear of the unknown". I've taken all of this on my own, no mentor, no guide, just had to do it so I did. I tend to make ALL the mistakes possible before I actually get things right. "Bent" Karma I guess. :-D

It's a learning curve. Lessons learnt the hard way stay with you forever. You will benefit from them in latter years and maybe help others to avoid them on this forum. We have all made them to some degree.
My 850 rebuild resulted in #3 pot not completely settling in until the engine had over 2000kms on it. I think I slightly damaged the oil rings on that piston during assembly. So dont panic.
Enjoy your ride and open that throttle!

[BadBillyB]

If you had issues with the oil control rings, you would only have smoke coming from the exhaust system. If you have pressure coming from the crankcase vent (breather cover) that causes oil or smoke to vent from the crankcase to the atmosphere, you have compression sealing problems. Replacing the rings and re-using the pistons and honing the bores is not a top end rebuild. A slight amount of "taper" in the bores combined with loose fitting pistons/rings will cause just what you have.....Excesive "blow-by"......The fact that your motor set up for so long after the work plays into the equation....Try running some Marvel Mystery Oil mixed with the fuel (may unstick "gummed" up rings) for a while and see if you get any good results........Billy

[don_gibb6512]

It's a learning curve. Lessons learnt the hard way stay with you forever. You will benefit from them in latter years and maybe help others to avoid them on this forum. We have all made them to some degree.
My 850 rebuild resulted in #3 pot not completely settling in until the engine had over 2000kms on it. I think I slightly damaged the oil rings on that piston during assembly. So dont panic.
Enjoy your ride and open that throttle!

Thanks for the support. I appreciate it. I figure at this point I don't have much to loose so I'm just going to ride like I would anyway which is pretty much thrashing it. :-D

And good idea Billy. Won't hurt to try some Marvel. Thanks.

[Nessism]

If you're running it in with synthetic oil it will take forever to settle down.
It is recommended to us 30 grade for the first 1000kms and then switch to 10W40 synthetic.

My understanding is that synthetic oil is not more slippery than dino oil, thus it should not affect the break-in process. In support of that line of thinking, some OE car manufacturers, such as BMW and Chevrolet with the Corvette, supply synthetic oil in the engine from new.

[tkent02]

My understanding is that synthetic oil is not more slippery than dino oil, thus it should not affect the break-in process. In support of that line of thinking, some OE car manufacturers, such as BMW and Chevrolet with the Corvette, supply synthetic oil in the engine from new.

It's not more slippery, but it keeps the parts from wearing better, not what you want. The new engines which use synthetic from the start are machined to much tighter tolerances, in effect need no break in at all.

[Nessism]

It's not more slippery, but it keeps the parts from wearing better, not what you want.

For lack of a better way to state it, I choose the word "slippery", which in effect means reduces wear. But again, I don't think synthetic oil reduces wear under any normal usage over regular dino oil. Where the synthetic oil stands out is under extreem heat and in that it doesn't break down very fast - thus it allows an extended change interval.

[rapidray]

Don, something you can do to speed up the ring seal process is to run the bike up to about 6000 in 5th gear & then close the throttle & let it come back down to about 2500 & run it back to 6000 & close the throttle again. Keep repeating this & it will help the rings to seat. What it does is when you close the throttle it creats a vacuum in the cylinder that sucks the rings to the cylinder wall. I've been breaking engines in this way for a LONG time & it works! I even do it to dragrace engines a few passes to speed up ring seal. The only thing I can think of if it still persists in smoking is that you may have installed either the top or second rings upside down. That would DEFINITELY cause a lack of ring seal. If it won't seal up & you have to take it apart I would look there first. Good luck, Ray.

[don_gibb6512]

Don, something you can do to speed up the ring seal process is to run the bike up to about 6000 in 5th gear & then close the throttle & let it come back down to about 2500 & run it back to 6000 & close the throttle again. Keep repeating this & it will help the rings to seat. What it does is when you close the throttle it creats a vacuum in the cylinder that sucks the rings to the cylinder wall. I've been breaking engines in this way for a LONG time & it works! I even do it to dragrace engines a few passes to speed up ring seal. The only thing I can think of if it still persists in smoking is that you may have installed either the top or second rings upside down. That would DEFINITELY cause a lack of ring seal. If it won't seal up & you have to take it apart I would look there first. Good luck, Ray.

Somewhere I read that I wasn't supposed to lug the engine but I'll try it. Thanks. I've done something similar but it wasn't all the way down to 2500.

And guys, I never used Synthetic in this engine. Valvoline 10W-40 for the first 200 miles and now Honda MC oil 10W-40.

[rapidray]

This doesn't mean to slam it open & lug it. Slowly open the throttle to bring the speed back up so it doesn't lug. If your 1100 won't pull back up slowly from 2500 you have a LAME 1100. Ray.

[don_gibb6512]

This doesn't mean to slam it open & lug it. Slowly open the throttle to bring the speed back up so it doesn't lug. If your 1100 won't pull back up slowly from 2500 you have a LAME 1100. Ray.

It most definitely does pull.

Ran a compression test yesterday after a short ride. Good news. 150psi across all four cyls !! :-D Still smokes but I think it might just be all that excess oil I was dumping in those cyls over the last four years.