tomek 398 Posted January 29, 2019 Damaged camchain Quote Share this post Link to post Share on other sites
tomek 398 Posted January 29, 2019 Damaged guides Quote Share this post Link to post Share on other sites
tomek 398 Posted January 29, 2019 (edited) Messed up piston Edited January 29, 2019 by tomek Quote Share this post Link to post Share on other sites
tomek 398 Posted January 29, 2019 And the grand prize , spun rod bearing. Quote Share this post Link to post Share on other sites
rockmeupto125 936 Posted January 29, 2019 That looks expensive. Quote Share this post Link to post Share on other sites
tomek 398 Posted January 29, 2019 (edited) It actually went from everything is fine to wtf in about 2 seconds. Anyone wanna take a guess what happened ? Edited January 29, 2019 by tomek Quote Share this post Link to post Share on other sites
sluggo49 22 Posted January 29, 2019 I'll start with a distinct ignorance about the internals of these engines: Shredded the cam chain guide, plugged the oil filter and spun the bearing. What's my prize? Quote Share this post Link to post Share on other sites
superhawk996 2,038 Posted January 29, 2019 (edited) The filter has a bypass that should let the oil keep flowing, but it coulda plugged the oil pump's intake. More likely, something got through the bypass and landed at that bearing, assuming the other bearings are ok. The obvious signs of mega heat there tell me it wasn't a 2 second ordeal, there was probably something going on with that bearing for quite a bit longer and it went unnoticed. Edited January 29, 2019 by superhawk996 1 Quote Share this post Link to post Share on other sites
jon haney 332 Posted January 29, 2019 (edited) In a world filled with ignorance and idiocy about mechanical things, the true cause could be almost anything. Assuming this is not one of your personal bikes, I'm going to go with "Too long of a wheelie with not enough oil in the crankcase". Edited January 29, 2019 by jon haney Quote Share this post Link to post Share on other sites
jon haney 332 Posted January 29, 2019 Wait. Is that piston a little more "domed" than normal? Quote Share this post Link to post Share on other sites
tomek 398 Posted January 29, 2019 47 minutes ago, jon haney said: Wait. Is that piston a little more "domed" than normal? No, not really. It got overheated and ring groves closed up. Quote Share this post Link to post Share on other sites
tomek 398 Posted January 29, 2019 3 hours ago, sluggo49 said: I'll start with a distinct ignorance about the internals of these engines: Shredded the cam chain guide, plugged the oil filter and spun the bearing. What's my prize? Well, very close. Quote Share this post Link to post Share on other sites
jon haney 332 Posted January 29, 2019 To much nitrous? Very low, or missing coolant? Quote Share this post Link to post Share on other sites
tomek 398 Posted January 29, 2019 (edited) The powder like plastic from camchain guides clogged screen in oil pick up tube. And Boom. Edited January 29, 2019 by tomek Quote Share this post Link to post Share on other sites
jon haney 332 Posted January 29, 2019 (edited) That's the cause of the bearing failure, but what caused the cam chain guides to shred? I've seen broken ones, but never shredded. What motor is that? Edited January 29, 2019 by jon haney Quote Share this post Link to post Share on other sites
tomek 398 Posted January 30, 2019 I apologize, chain is damaged , I should have taken better picture. On the left side in shaded area you can see small piece of metal sticking out. Quote Share this post Link to post Share on other sites
blackhawkxx 2,431 Posted January 30, 2019 4 hours ago, jon haney said: What motor is that? Yea, what is it? Quote Share this post Link to post Share on other sites
superhawk996 2,038 Posted January 30, 2019 Plugged the pump's inlet; I WON! But since I'm on ignore I won't be getting a prize😪 But if that's the only damaged bearing it wasn't the plugged inlet alone that killed it, some of that plastic probably got to that bearing. Quote Share this post Link to post Share on other sites
sluggo49 22 Posted January 30, 2019 With an inadequate flow and pressure, that bearing didn't require a piece of debris on the land to cause it to seize. I guess I'm most amazed by the can chain failure. Had the chain been making any noise? Did you miss a WFO shift? Quote Share this post Link to post Share on other sites
redxxrdr 450 Posted January 30, 2019 Not to hijack to a oil thread, but what type were you using? Dino or synthetic? very clean in there , except for the guide shavings Quote Share this post Link to post Share on other sites
XXBirdSlapper 1,330 Posted January 30, 2019 How did the damage to the chain occur? Quote Share this post Link to post Share on other sites
jon haney 332 Posted January 30, 2019 Wow! Didn't see the spur on the chain. Hard to believe the chain didn't completely break. Extra noise might have been hard to notice. Especially if the bike has a loud exhaust. Quote Share this post Link to post Share on other sites
CBR-RR-XX-CESS 476 Posted January 30, 2019 Ok fess up, someone drained and forgot to fill. 1 Quote Share this post Link to post Share on other sites
superhawk996 2,038 Posted January 31, 2019 (edited) On 1/30/2019 at 7:18 AM, sluggo49 said: With an inadequate flow and pressure, that bearing didn't require a piece of debris on the land to cause it to seize. I guess I'm most amazed by the can chain failure. Had the chain been making any noise? Did you miss a WFO shift? But if it wasn't debris at that bearing why is that the only one damaged? It could just be that it's the one at the far end of the path so it got more starved than the others, but that's a lot of damage for just a general starving, assuming the others are not damaged. Edited February 2, 2019 by superhawk996 Quote Share this post Link to post Share on other sites
