BJohnson Posted September 30, 2019 My sons KTM 250sxf has some debris in oil. We also had some noise with timing chain but think that is fixed with new tensioner that everyone suggests. Anyway, wondering if someone can point me in the right direction for what to look for. See photo Share this post Link to post Share on other sites
mog Posted September 30, 2019 Could be gears ,what year ? How many hours ? How hard is he on the bike ? Share this post Link to post Share on other sites
lowmass Posted September 30, 2019 clutch rubbers coming apart? Share this post Link to post Share on other sites
mog Posted September 30, 2019 clutch rubbers coming apart? no rubbers on 250 Share this post Link to post Share on other sites
lowmass Posted September 30, 2019 Hmmm well OP are those chunks plastic, steel,aluminum?? hard to tell from pic but doesnt look like metal Share this post Link to post Share on other sites
BJohnson Posted September 30, 2019 Thanks for responses. This is a 2105 with 75hrs on it. The debris seems to be metalic as a magnet will pick it up. It is not very rigid though. Easy to snap these little pieces in half. Share this post Link to post Share on other sites
Randy Bonds Posted September 30, 2019 Looks like it could be the plastic frame for the oil pump intake screen/strainer. There is a plastic gear for the oil pump also. Share this post Link to post Share on other sites
BJohnson Posted September 30, 2019 Thank you, i will look into that Share this post Link to post Share on other sites
BJohnson Posted September 30, 2019 intake screen is intact. Share this post Link to post Share on other sites
BJohnson Posted September 30, 2019 Is #4 the gear you are talking about Randy? Share this post Link to post Share on other sites
pecor Posted September 30, 2019 (edited) "Quote"{We also had some noise with timing chain but think that is fixed with new tensioner} The Timing chain tensioner press's on the {Chain Guide} ?? pieces of the -> guide itself ?? I'm Taking a well educated guess?? #4 -- #5 -- Or #15 https://www.bikebandit.com/oem-parts/2018-ktm-250-sx-f-us-timing-drive/o/m162079sch1050162 Edited October 1, 2019 by pecor Share this post Link to post Share on other sites
KRAYNIAL My Rides (7) Posted October 1, 2019 Looks like the tip of the timing chain tension strip. Not uncommon to break. Change the tensioner, strip, and chain. Share this post Link to post Share on other sites
BJohnson Posted October 1, 2019 We will look into this. The material is metallic as a magnet will pick it up. Looking for a video on replacing these to see what is involved. Thanks Share this post Link to post Share on other sites
pecor Posted October 2, 2019 (edited) KTM- Made of Powdered metal and plastic-nylon mix? for chain wear purpose's?? Yamaha has a thin strip of metal encased with plastic-nylon? On their chain tension strips, In their older models. I don't own a new one so can't comment on them. Edited October 2, 2019 by pecor Share this post Link to post Share on other sites
BJohnson Posted November 28, 2019 Update. This is what the issue was. The mechanic that had installed the flywheel weight apparently did not do it correctly. It came off and the debris was the epoxy that was used to install the flywheel weight 2 Share this post Link to post Share on other sites
