![]() ![]() Produced from 1985 to 1986, the Honda 350X ATC (Big Red 350) featured crisp brakes, grippy tires, and a powerful 350-cc mid-range motor. Given its racing lineage and prestige, it would be fascinating to know what this reputable vehicle has to offer. This head-turner is not only a serious trail machine but also included in the illustrious Big Red bikes – a part of Honda’s sport ATC lineup that began in the ‘70s. ![]() ![]() Seriously, I reeeeeally appreciate that you took time to take pix.\Not easy to do in the midst of flying tools.Īll ya gotta worry about now is trying NOT to get more.Disclosure: We may get commissions for purchases made through links in this post.Ī true off-roading enthusiast would undoubtedly recognize the Honda 350X ATC as the archetype of modern-day utility vehicles but with three wheels instead of four. I'm next, but thanks to you, I have something to dream about. please look back at my pictures and ask any questions. As far as I know reverse the process to put back together. Step 8: Now your chain is exposed, take old one off put new one on feed up through the cylinder, head, and onto your upper cam gear. Step 7: Take three bolts out of oil put 8mm wrench, and simply slide oil pump and gears behind off at one time. Step 6: Take two bolts off that are holding oil line on 10MM wrench and remove oil line. Take manual clutch nut off 27mm (RIGHT HAND THREAD), and slide manual clutch off. Step 5: Remove 4 bolts, plate and springs off manual clutch. Step 4: Take centrifugal clutch nut off using 27MM socket (LEFT HAND THRED). Step 3: Remove oil line, it just pulls out, be careful not to bend excessively. Step 2: Remove kick start and clutch cover, 8MM wrench/ratchet Pretty simple and self explanatory, (valve cover on right you don't need to remove head but makes the process easier). Step 1: Take Valve cover and cam shaft off/out 8MM and 10MM wrench/ratchet. Step by step plus some pictures hope this will help someone!!! Okay did a test run on my parts motor 86' 250ES pretty much the same motor as 250SX. If this your first 250, you will be hooked for life and I don't remember the manual specifying reverse threads and not something I'd want to do wrong with lots o' torque. Please keep us posted and maybe pix, if you can. It has come very close to getting flying lessons lately. ![]() I have the oldest cell phone and my txt msgs are super archaeic and virtually unreadable with almost no punctuation. I just hope I don't have to do one (no garage). Not an uncommon repair so I'm sure there is lots of good info here, especially from someone who's done it. Wonder why it failed? and sx may have been run a little more aggressively than an es but both are super fun GREAT machines. Oil filter in correctly? If not, it can starve the head of oil, or so I've heard. I pulled one out and it had nice oil stains so I knew it wasn't all the way out but still had chain slap noise. Now if you could push in against the chain rail guide and measure it, it would save lots of heartache. Like.with yours, you Know the chain is stretched. I really wish there was a service limit measurement for those chain tensioners. Any advice would be very much appreciated, however un-needed rude post based on my prior question (typed via cell phone) will not be needed. I believe I have thoroughly explained the situation and am currently seeking guidance from an individual who has done this procedure before. I am aware that I can purchase a new cam chain online for around 70$ USD. I did valve grinding job, purchased and new piston, and rings. I purchased a better (used) cylinder head. I attempted to use three different cam chain tensioners to finally confirm the timing chain to be completely worn out. I thought the issue was possible a faulty cam chain tensioner. I recently purchased a 1985 Honda ATC 250 SX with bent valves, due to and worn out cam chain. Okay Threewheelerworld gentlemen, I am simply wondering who has changed a cam chain in a 1985-87 Honda ATC 250SX or 1985-87 Honda ATC 250ES. ![]()
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