Build a Yamaha HS1 90 twin crankshaft

[@peteetwell826]

Another crankshaft rebuilt and trued to perfection. Your attention to detail is second to none!

[@montana2strokeracer]

It was kind of a pain, but it's done and I'm happy. Should be a smooth runner.

[@jamesws3]

Seriously cool! Very creative and engaging. You take rebuilding old bikes to a whole new level!

[@montana2strokeracer]

Thanks Jim, nice talking with you the other day.

[@petermckee1061]

Beautifully done Dale. Lovely work. Keep them coming. Cheers, Peter.

[@montana2strokeracer]

Thanks Peter, had a little trouble with this one.

[@DanteJacobson-vg3br]

Hi Dale you make single crank rebuilds look so easy.

[@montana2strokeracer]

Singles are usually pretty easy; I have had some that were not.

[@douglasmeeker360]

You're a wealth of information Dale! Way to keep cranking them out.

[@montana2strokeracer]

Thanks Doug, I appreciate you taking the time to watch.

[@frankdillon6127]

guess its just us today! got the coffee and ready to go!

[@montana2strokeracer]

Thanks for stopping by Frank, decaf please.

[@jamesbanjomanjohnson]

thanks 4 the shout out ol buddy and good job as always, the little chopper will make you a good paper weight, glad 2 see it put a smile on your face, catch u on the next one...

[@montana2strokeracer]

No problem, James, I love this little chopper, you did some fine workmanship on this little guy.

[@alvyndeen2700]

Congrats Dale ,You're a very patient man .Great job love it.👍

[@montana2strokeracer]

Thanks Alvyn haven't always been that way, they say it comes with age. Wish I had learned to be patient many years ago. Would have saved a lot of grief.

[@retromechanicalengineer]

Great job Dale. I was doing a crank today too, but it was a clonky old Bantam, not a precision piece of kit like yours! You got that one trued to a hair's breadth. Best wishes, Dean.

[@montana2strokeracer]

Wow, I guess we do have some kind of karma going there Dean. Clonky....no, I don't think so, they all need to be done precisely. I did have to wrestle this one some, not the easiest one I've ever done.

[@retromechanicalengineer]

@@montana2strokeracer that's it Dale, some seem to fall into place, others fight!

[@davidleland8729]

Very nice work Dale! Your videos are a big help!

[@montana2strokeracer]

Thanks again Dave, appreciate you stopping by.

[@billhardaway6222]

Awesome work as always Dale. Just got done watching it.👍🏁💯

[@montana2strokeracer]

Thanks Bill, it was a challenge, but got her done.

[@MegaWildweasel]

great stuff, I am doing an rd350 this week done a few single cranks , I was planning on doing it like you did this is a nice confirmation.

[@montana2strokeracer]

Nice, good luck with your build.

[@markaddy53]

fantastic job that dale well done should be smooth as butter keep up the great work next video please

[@montana2strokeracer]

Thanks Mark, I am happy with the results so far.

[@RW-kd4gxwhiteshaddow]

Cool. Very informative

[@bigmurr725]

Thanks Dale , Great work . Finding parts can gobble up alot of time .

[@montana2strokeracer]

Yeah, I have just got a list of Yamaha dealers I'm calling. Seems none of the ones I have called are hooked up to Lite Speed. I guess it is pretty expensive, so probably only the biggest dealers have it. You are right it takes a lot of time. But I did find one piston so far.

[@bigmurr725]

@@montana2strokeracer hey Dale, if you want to give me the part number, I can look here on my end?

[@montana2strokeracer]

What a generous offer. The piston is 241-11635-01 (.25 over) and the rings are 132-11610-21 (.50 over) need two of the rings. Thanks Murray.

[@bigmurr725]

@@montana2strokeracer OK Dale i will give you a shout if I have any luck . Your very welcome Dale .

[@retromechanicalengineer]

Hello Dale, I tried the UK Yamaha dealer network and they are shown as discontinued. I'll keep my eye on UK eBay too. Best wishes, Dean.

[@oldgreybeard2507]

Good video - many thanks

[@montana2strokeracer]

Thank you very much.

[@EnzoMoresi-mj8bc]

Another excellent vid. Would be great to see old video of how those same cranks were mass built on the line at the plant 50 some years ago. BTW.....you're really rubbing it in saying you should shut the door and turn the heat ON, while some us are sweltering in 110 degree muggy California. You're livin right Dale.

[@montana2strokeracer]

Yes it would be interesting to see how they were made. I know you guys are suffering in the heat, strange year here, 55 degrees the day of that video, today 94. That is hot for us. By the way, never turned on the heat, real close though.

[@cainbeeping8480]

Good job brother.

[@montana2strokeracer]

Thanks Cain, riding that Honda yet?

[@cainbeeping8480]

@@montana2strokeracer getting close

[@davidleland8729]

Good morning Dale. I've been following your lead on a TS400 engine. So far it's coming together pretty good. Hopefully I haven't messed anything up. The TM125 and RM370 are done.

[@montana2strokeracer]

Dave you are making great progress, think you are much faster getting to it than me. Dragging my feet some.

[@davidleland8729]

@@montana2strokeracer Not really faster there Dale, just fewer projects. Don't like to overwhelm myself with too many things to do at any given time.

[@davidleland8729]

There are shops within a few miles where I can get parts and get engine work done. That salvage yard up in Phoenix is a 2 1/2 hour drive one way, so I put together a fairly large list of used parts to find before I go there.

[@montana2strokeracer]

Yeah, Dave I have too many going right now, parts are mostly the problem. But its also summer, so I am working on household things too.

[@montana2strokeracer]

Its nice that you have some shops close by to farm some of the work out to. It sounds like the salvage yard you have is outstanding.

[@richb419]

Hi Dale. do you know what the press fit tolerance is between the pin and the crank is? .001? Rich

[@montana2strokeracer]

Hey Rich, why yes, I do, I have a very inquisitive mine and I want to know stuff like that and make a record of the info. Most folks don't care about that kind of thing. I take lots of measurements that you really don't need to do. The answer to your question is they consistently run .002 interference fit, the crankshaft flyweights run .708 and the pins a consistent .710. Thanks for hanging out in the shop with me.

[@richb419]

@@montana2strokeracer Hi Dale I would never dream that the interference fits would be different between the pins and the crank. Thank you for the feedback!

[@birdy695]

Ref the crank over all length, -.05 -.1 what it actually means is 42.95mm to 42.9mm.

[@montana2strokeracer]

Nice that makes sense, there are a lot of discrepancies in these old books, just thought it was another one of them. My big crank chart has never let me down, it's my go to. Thanks for making sense of it for me.

[@cainbeeping8480]

Here