Hey all. I haven't been around here in a long time. Really, ever since I gave up the dirt life by selling my beloved CRF450R for my DRZ400SM and the supermoto life. But we still have my sons '12 CRF250R. Need some help identifying something I found in his motor. But first a little back story.
So My son's CRF250R has managed to tick away to about 140hrs on the bottom, 70hrs on the 2nd top end. I should have just well-enough alone. I took the bike to a so-called motorcycle mechanic to have the top and bottom end rebuilt. Figured I'd be proactive. Between my job and my own school schedule, I had zero time to do it myself, so I took it to a shop that was a recent sponsor at our latest, local MX race series.
4 weeks later I get the bike back, top and bottom done, roughly $1k for everything. It's good for one ride, then the second time on the track it starts smoking. Took it back, he had it another 6 weeks to diagnose and fix. Finally get it back, it sits in the garage for a week before we can get it to the track, low and behold...the night before going to the track, I find an oil leak on the floor in the garage. I did some detective work and...let's just say, this guy has no clue what he's doing and should NOT be working on bikes. I found a few choice issues after taking off the right side cover and tank. One which caused some mayhem in the transmission side. Most concerning was the primary gear (the two gears that connect directly to the crank, then to the flywheel) was found to be finger tight. It had been this way for the entire day during that first ride after the rebuild. This caused some damage to the cogs and some metal shavings in the transmission oil. >>Photos Here<<
Anyway, Aside from the transmission issues I found, I find metal shaving in the oil filter. this warranted pulling the left cover off just to see if I could find anything else on that side. I find these two pieces of what appears to be plastic in the center of the flywheel, just floating around.
Question: Does anyone know what this could be? I've only done top ends before, and never taken a bottom end apart - so I'm not familiar with anything that may look like this. Any ideas? I'm not taking it back a 3rd time to this bozo. At this point I have zero trust in the work and I will be contacting him in the next couple days - once I get my documentation squared away.