In this video I disassemble the Yamaha HS1 90cc twin to determine what is causing the noise. Just as imagined it is the crankshaft, and all the bearings. Worse than imagined, the entire engine was full of water and mud.
Big price to pay. It’s a labor of love remember. I hope it balances out for you or whoever. You can do this ! You’re truly amazing Dale ! Can’t stop now ! Sometimes this is what life’s about. Hang in there buddy ! We’re rooting for you. ❤️
Man alive, what a mess. So sorry mate. A load of work in that and it's not like you've nothing else to do! But glad to see you can still laugh about it at the end. Cheers, Peter.
I’ve got so much catching up to do on these videos :) , on the aircooled rd350 I use the big fine threaded bolt that holds on the muffleron as the puller , it works perfect lol
When I saw that slurry of muck on your bench, my heart sunk. I swear it came from the CB750 in my garage. Admittedy, the little twin is much worse. Commonly, as bad as the damage from neglect and the elements is, ham fisted "mechanics" seem to inflict deeper wounds. What amazes me after seeing it disassembled and viewing the carnage, is that you were able to get it started beforehand, and is testimony to your skill and the robustness of the Yamaha engineering. I guess that's why us 14 year olds thrashing them couldn't kill them.
Our workshop activities seem to mirror one another sometimes Dale. Another engine that has stood full of water. It really destroys them. I had to cut the rod on the B175 and I won't be able to save the cases. Luckily I have found a good used matching pair for my customer. After all that, the crank still measured in at 2.5 thou runout! BSA did a good job. Yamaha did too, as yours still ran in that condition. You have a lot of work on this one, I wonder if it might be worth looking for another engine to build in its place? Thanks for all of your recent support Dale, it means a great deal. Best wishes, Dean.
Yes, I think so Dean, water is the worst for sure, I generally have pretty good luck with these old bikes I find. This is pretty rare, being a 2 year only here in the states. So, I am pressing forward on it, slowly. I think I have a lead on a set of cases, will see how that pans out. These bikes can take a lot of abuse, but at some point, that's all she wrote. Think that's where we're at now. Your welcome buddy anytime.
Truly a shame it sat in the wet and the challenges of the previous owner's 'modifications.' Doesn't take much where the cost adds up to more than a finished bike is worth, if parts can be found. All the best, Darren.
Hey Jim, yes, this one is getting me into some areas that I have not seen in over 50 years. It's fun revisiting this little twin. They are really neat bikes.
It would be nice if someone had an engine that was in better shape for ya, but I have to admit that part of the appeal of your Channel for me is your resourcefulness and ingenuity. There aren't a lot of folks willing to give it a go with the older bikes, cause they can't handle the challenge. I've finally got both my bikes strapped down in my truck box. Tomorrow morning, I'll be wheeling them up the ramp of the old wool shed next door, where my workshop will be. I've got parts in boxes and workshop manuals for both bikes, some basic tools, shelving and a workbench or two. Have bought new parts and some used ones. I look forward to your videos every week because I know that even if you aren't working on my year, make, or model, there will always be useful information shared on your Channel, including your ability to face a challenge and your resilience to see a project through to completion. I also know that you have enough experience to call it if it's just too far gone, that's also valuable as well. I appreciate what you do Dale, keep on wrenchin', that's why we're coming along for the ride Mate!😊👍
Hey thanks for all the kind words, Gigi. I am pressing forward with the project, but it may be kind of slow. I have brought the AS1C into the shop and will be doing some tune-up kind of stuff to it. I am sure this will be right up your alley. Finally getting moved, I bet that is a great feeling. I hate moving, I moved 13 times in 20 years in the military and have just had a gut full of it. Glad you are getting it done and hope you will be settled in in no time. It nice to have you along for the ride each week. Thanks for hanging out in the shop with me.
That was the workshop version of a horror movie! Those casing cracks around the kick start shaft shows the bike had chronic starting problems. Maybe the crank seized at some point due to oil pump problem and somebody unseized it by jumping on the kick starter.
Hey Steve, yes, I think your right. I have found another set of cases, not in hand yet but hoping they are good. We will move forward on it, be it slowly.
Don't get depressed by this one Dale. I know the feeling when you disassemble an engine and find damage that you weren't expecting. You have the spare engine to choose the best parts from and the ability to refurbish those that are useable. Expenses for parts is just a consequence of the hobby we all enjoy. Plug along doing what you can and update when the budget allows for parts purchases. We are with you all the way!
Thanks Pete, yes, it is a little depressing, but nothing I'm not used to. Just thought this one was in better shape than it is. Will make some interesting videos for sure.
Thanks Dale , when i first saw the stater I thought it looked supper clean and no rust . How things change , I dont know whats worse Dale . Your HS 1 or my TX 500 . Keep up the good work Dale .
Hey Murray, yep, looked great till the clutch cover came off. Think I found a set of cases, we will see how that turns out. Pistons and rings are hard to find for this one too. 100 twin jet stuff is readily available but not this 90 stuff. Pressing forward my friend.
I guess it was worst than we thought. That really sucks. However after seeing what you have done in the past on engines, I know that you will bring life back into this one as well. Keep up the good work and have a safe weekend.
Good to see you're still able to crack a smile after that discovery. I had thought this one must have sat out in a desert in order to have those rust-free rims and faded paint on one side. But water damage inside? I still think it's a piece of history, being their smallest twin.
Yes, sometimes you just have to accept the way it is. But I think I have another set of cases located; we will see. Would like to continue on this little bike. It's kind of rare, two-year bike.
i know how you feel right now,, the reason you do this is to challenge yourself, you weld up the cracks you put in bushings where there needed and you fix it, you've got the mill and the lathe and lots of skill, when your done your proud of it, there not all easy , and remember you saved it from its final death, go slow take your time and you win, don't let it beat you cause your the one who's going to win in the end...
Yes sir, top is worn, pistons and rings are hard to find. I have another top end that is somewhat better, but still would like to put new pistons in it.
Think DEVO had a song called "Big Mees" sorry ... too much water too long, money pit. Abandon ship. Learn when to hold em and when to fold em. Up to you though, .I'm jus say'n Flodaddy ❤
Well Mike, think I located a set of cases, pistons and rings are hard to find, but on the prowl for them. This is kind of a rare little thing, 70/71 only. We will see where it goes.
