I had this engine bored-out by a powersports machinist and it's got a nice looking cross-hatch on the cyl. walls about 220 grit,I'm using oem Honda piston and rings and getting ready to do some 'break-in runs'.
I heard lot's of different ways of doing it.. I was always into going real slow and easy on break-in until 600 miles and then jumping on it. The last time I did that I had honed the cylinders w/ fine(400) grit stones and got 'blow by' and the rings didn't seat. I am considering this way now: Oil-up the cylinders and then wipe-off all the oil w/ shop towels and install the piston/rings w/ a little oil on each skirt and the rings dry.I was told this will still leave an oil film on the cylinder walls but not so much to keep the rings from breaking-in within the first few miles while the cylinders are still rough enough to scuff those hard oem rings in well initially.I'll be using light 5/30wt. oil just for the break-in.
I was planning on getting the bike over to this road(first start-up w/ 0 miles on the fresh top-end bore job) just down the street from me which has a decent 10-15% rise to it for about a 1/4 mile and then it goes downhill to a stop sign and a 'T'.I plan on starting the bike up and letting it idle between 15-2500rpm's and after just a minute or so start up that road w/ about 1/3 throttle and no more than 5-6K rpm and shift up to 3rd by the time I crest the hill and then back-off as i descend and let it decellerate slowly.I then ride back up that part of the road and return/descend down that long hill and do this roughly about 6 times while giving it about half throttle max while letting my rpm's increase slightly/progressivlely.The road is almost a mile long and basically is a steep hill which crests in the middle w/ descents on both ends.I would be climbing the longest part of it at first and returning down that to turn-around and do it again. I'd like to hear how you would do top-end/bore job break-in runs and what has worked for you.There are so many different folks that give advice on this, it's interesting to hear what works for them.I just want to be sure the rings completely seat-in this time around and want to be careful to not over-stress the piston skirts on decelleration.
This is all going to be done After the snow passes out of here
and the roads are nice.
I have done plenty of engine break-ins before but this thread is just to give me more ideas on how I might improve on my 'technique'. I think 'an old dog can learn new tricks'
in a manner of speaking..