Hi everyone,
I've been trying to diagnose an issue on my 2005 CRF250x (I'm not the first owner). I just did a top end on the bike (new valves, cam, cam chain, did not replace piston or jug because they were in immaculate condition).
Even prior to doing the top end, I noticed small amounts of silver metal flakes in the transmission oil. Since riding for about 3 hours after the rebuild, I've noticed a larger amount of these flakes and several chunks (see attached pictures). They are non-magnetic which caused me to take the clutch apart to inspect. The clutch basket appears to have minimal scoring (evidence of wear but it does not feel rough and no notching) and no evidence of chunking that would explain the pieces recovered from the transmission oil. The clutch plates likewise exhibit no signs of excessive wear or chunking. When riding the bike, I have no issues shifting or finding neutral. The only shifting related issue is when I start the bike without pumping the clutch lever and shift into 1st, sometimes it will die. Other than that (and a possible air leak I am still trying to diagnose) the bike runs great. Does anyone have thoughts on what may be causing the issue? Thanks!