Motoroil burning and changing Piston Rings

[rollerfish01]

Hi all, at 2018 I found my bike seems burning oil and I replace a spare cylinder head and changed all the valve stems...
https://gsx1400owners.org/forum/index.php?PHPSESSID=6mdsv28ijba0okr77vlhcemtc5&topic=2188.15

but the problem was not solved and oil burning became more serious, as I said at another threat "The symptoms is when the engine was fully heat up (or became very hot in summer time) or run for 20-30kms, white smoke would occasionally came out from the exhaust when the bike is stopped at the traffic light. White smoke would disappeared when the bike run again.Also the spark plugs were oil fouled lightly after 500-800km. One of the spark plug would stop firing when the oil fouled became serious enough." 

So finally I decided to change the piston rings (I guess they worn out was the ultimate reason?) and up to now the engine work fine and no more burning oil. The process I reference to the Suzuki service manual and Haynes manual, I found the most tricky process was how to push the pistons rings into the cylinder block and how to make the cylinder block and piston match up stably...finally I use a very layman way to do that. If anyone can share some other  workable methods would be nice !

just share some photos here:
   

[Hooli]

Nice work, I've never known a 14 to burn oil before. Any idea why the rings went?

[rollerfish01]

have no idea...maybe the owners before use the engine harshly or maintain the bike badly...

[froudy]

I'm by no means an engine expert, but did you get the barrels honed when you fitted the new rings? I believe that this is normal practice.
Ring failure is unusual and quite possibly due to poor maintanence by the previous owner. Hope you get it sorted

[grog]

Froudy, 14 has the composite material on bores. Ive built a lot of normal motors but not sure of answer with these. Just fit rings im guessing, not much you can do to bores.

[Andre]

As long as the coating of the cylinder walls is intact just replace rings. I'd say they can't be honed. Re-coating or new/used cylinders if coating is damaged. 

[steve porter]

Dunny brush hone https://www.amazon.com/Brush-Research-FLEX-HONE-Cylinder-Abrasive/dp/B005ANHYF6
Gives a nice  random cross hatching

[grog]

Steve, yes they work great on normal cylinders, not composite like 14 has.

[steve porter]

Steve, yes they work great on normal cylinders, not composite like 14 has.

Composite as in? Not exactly familiar with,and hope to never become acquainted with the innards of the 14. Reference to composite I assumed  was nikasil or similar which De glazes beautifully  if necessary by a quick spin with the dunny brush and a squirt of WD40, I have a Ducati sized one in my kit that has been used on numerous occasions with great success

[rollerfish01]

Yes, I have considered a lot about the cylinder honing and does it need to run-in the new piston rings...

One day I saw the Haynes Manual wrote: 
"...The bores are electro-plated with Suzuki's SCEM (Suzuki Composite Electro-chemical Material), a highly wear resistant nickel-phosphorus silicon-carbide coatinf which should last the life of the engine. If any cylinder is badly scratched, scuffed or scored, the cylinder block must be renewed. The bore surface should not be honed." (Haynes Manual 2.26, Inspection: paragraph 9)
so I realize it's no need to do honing.

About run-in period I'm not so sure, the information on internet about run-in usually about new cylinder block/ honed surface with new piston rings. This time is a old cylinder block/surface with new piston rings...does it need to run-in ? 
Anyway I tend to agree on this guy's idea :
http://www.mototuneusa.com/break_in_secrets.htm

[Andre]

@rollerfish01

A 2-part reply to http://www.mototuneusa.com/break_in_secrets.htm

https://www.youtube.com/watch?v=Ij7-LyOFlUU

https://www.youtube.com/watch?v=nOb_PE7DKvE

And then there is this, short and sweet:

https://www.youtube.com/watch?v=u74jYkItdD8

IMO the new piston rings should be run in like doing it on a new bike.

[steve porter]

Agree, hard running in causes all sorts of problems, running in new rings on unregistered race bikes is a nightmare as you don't have the Luxury of time and miles to do it properly, have used the dunny brush hone  on Nikasil bores that had uneven shiny patches that wouldn't seal which ended up much cheaper than tossing them and starting again with new

[grog]

Thanks Steve. Youve done it and it worked, all we need to know. Gotta be better than throwing old barrels in the bin. 👍

[steve porter]

Thanks Steve. Youve done it and it worked, all we need to know. Gotta be better than throwing old barrels in the bin. 👍

To clarify, it wasn`t my idea out of the blue, I showed a pair of barrels that weren`t seating and looked like shit and very uneven to a very well respected Ducati race engine builder and he pulled out a dunny brush hone  and said get yourself one of these and proceeded to hone my barrels in front of me in less than a minute.and siad he does it all the time, Good enough for me

[VladTepes]

@Andre
FortNine is my favourite motorbike YT channel - massively underrated
Ryan is a great host, and the  cinematography is as good as Top Gear at its best, too.