im about done with this motor.
I've put two top ends in it in less than a year. the first one was a total rebuild supposedly that Honda put in and it lasted 2engine hours before it started rattling (timing chain) so i took it back to Honda and they gave me the run around about it saying the whole top end was shot. so i picked it up in peices because i didn't even want them to touch it again. so i put a top end in it myself and it lasted three rides before it started smoking. pulled it down and the cylinder looks like it has been in the motor for years and its not like i put a used cylinder in it it was a fresh big bore from alba.

im thinking the oil system isn't working or something. is there a way to check it. i know its getting oil to the head but im thinking the oil jet in the case is an issue. also the crank feels tight. but is there a way to check that in the motor?

thats not good dont know what to tell you but that sucks!! maybe a problem in bottom end ?

I believe there is a oil screen inside the engine you can get too if you pull the side casing off, aswell as the oil screen in the oil resivour aswell,

I'm on my third 4th gear,shift drum,clutch basket and middle fork. Not had a problem up top.

im thinking its the crank. the wrist pin is worn just like the last one and so i will replace it and hope that is the problem this is starting to be an expensive problem. but if it was the crank the whole time im willing to bet Honda didn't replace it like they said.

i did learn something about having a shop do the work. always ask for the worn parts before they start so you know they replaced it or least went to alt of trouble lieing to you lol

oh yeah thats the truth my small town honda shop is good about that especially if its an warranty job!

maybe you should stop riding it like a 3 dollor whore lol

lol oh it has been ridden like i high end hooker. no cheap shiat goes in my motors until now lol... she is getting a hotrod crank... hope it holds up.

i am suprized there was no brass bushing in the stock crank. no wonder i had so many problems.

I lean on the slipper pistons being a contributing factor to the abnormal wear we've seen in these motors. I don't believe the slight power increase in the design is worth the trade off of less reliability. If I ever have anymore pistons made they'll have full skirts with anti friction coating I had put on the others I had.

Hey man I had a similar problem. I know if your cylinder is shot and you put new rings in it it will eat the rings up within a few weeks of riding or so. Seems like the best idea is to unfortunately re-place everything at once that way you don't have any old worn parts causing abnormal wear on parts that are brand new. I had to take my stupid top end apart a few times before I found this out. It was starting to get really old. I've been riding it for about a month now and no problems with it, so let's hope it stays that way for a long time.

Also, make sure you use some sort of air filter oil on your air filter especially if you ride in dusty conditions. I think that's also what helped kill mine in the first place.