Viktor_AZ

Hi everyone, I'm in the process of replacing all oil seals on my crankcase cover / stator cover (2000 Honda TRX250 Recon). Well, the main large seal was really old and dried up - when I tried removing it, the top portion tore off from the rest of it. It looks like the lip part of the oil seal stayed inside the crankcase cover (hopefully you can see it in the pics). I was trying to scrape it out and started damaging the cover. I'm not 100% sure but it looks like there's more rubber from the seal in the crevice (just hard to get in there to get it out). I'm holding the new seal next to it in the photos for your reference. Is there a way of removing the broken-off part of the oil seal?

Thanks @Orvis25. Both @shadetree and @jeepwm69 have been really helpful. Today, I was inspecting some of the parts and noticed that camshaft had a "chip" (see photo). Is this normal? Should I replace it or can it be reused? Wasn't sure if connecting rod smacked and chipped it... However, I've looked at a few used ones on Ebay and some seemed to have the same chip. Just wanted to double-check with ya'll.

I've finally split the case and I gotta say - this thing is a gift that keeps on giving. Looks like connecting rod smacked the crankcase and chipped some pieces off 😭 (see pics below) So now, on top of everything, I'll need to see if I can find me a crankcase replacement. I saw a few used ones on ebay but does anyone know where I may be able to find a clean used or new crankcase for a descent price? Part # 11200-HM8-000. I was also leaning toward having my crankshaft rebuilt with a new connecting rod. However, I'm hesitant to reuse the existing bearings from the original crank. Does anyone have any recommendations as to where I can get a descent price on a new crankshaft assembly? Part # 13000-HM8-000. I've looked at Rocky Mountain ATV and they're asking a little over $400. Thank in advance!

Thanks for all the feedback, really appreciate it! Out of curiosity, I stopped by a local ATV shop and got a quote to have this motor rebuilt. They quoted me $3,500 which seemed really excessive. Anyway, I think I'll keep working on it myself and learn a thing or two along the way. My next step is to split the case - I plan on working on that this weekend. Will keep ya'll updated and will share photos. In the meantime, here are some photos of my cylinder head. I've also included a pic showing the top of piston where the valves were hitting. 1. Do you think I would need to replace the valves? Or just grind the valves? 2. What do valve stem seals look like? 3. Any other work that would need to be done to the cylinder head?

Hi everyone, my name is Viktor. I'm new to this forum and new to working on ATVs. I have a 2000 Honda TRX250 Recon that was sitting for about 8 years. I got it from a friend - he didn't want to spend any money on it and is not mechanically inclined. I like tinkering on things, ended up pulling the motor, took the top end off and noticed that the piston was not connected to the crankshaft. Basically the connecting rod exploded inside the motor, metal chunks everywhere (probably was low on oil and/or revved too high). See photos. I got this thing for free and don't mind putting a little bit of time and money to get it to run. At this point, it looks like I'll need to repair/replace the cylinder (needs a new sleeve), piston, crankshaft with connecting rod (likely will have that rebuilt), replace timing chain and seals. I spoke to few people and definitely feel like it will be worthwhile fixing this thing. This thing is in great shape for its age, no rust or anything. Just need to get it to run again. I'll likely work with Vince at Mr. Crankshaft to get my crankshaft rebuilt. Do you have any recommendations as to where I can find a good used cylinder? Not sure if it's better to have new sleeve pressed in, or find a used cylinder and have it bored, or just buy a new OEM cylinder? Also, would I need to have anything done to the top end, such as valve springs, etc? Thanks in advance for your input. I haven't split the case yet but I've attached photos of the cylinder and broken connecting rod.