101 Scout... going to take a while

[pisten-bully]

Eric, I looked and didn’t find another RH crankcase that didn’t need repair, but I did find two complete engines with transmissions ready to go....they were both for sale north of $10k. What I really wanted was to save that case, so I found a fellow in Latvia, Juris Ramba (AMCA member) who has a very detailed process of saving old castings like this....so off to Latvia my cases went!

I’ve actually got some good pictures of his process and his progress on my cases, so I’ll post a couple of them tomorrow. Juris has restored several of his own bikes and he has a machining business, so working on my cases happens when he has the time. But I’m very happy with what I’ve seen so far!

Meanwhile....my Chief is my main entertainment!

[exeric]

Anything new with your 101, Harry?

[PaulCDF]

Plan B:

May be to find someone capable of custom casting & machining service using old right hand case as a pattern.

But; I am hoping you find a replacement.

[Mick christie]

Sent u a pm harry

[pisten-bully]

The 37 c.i. 101 Scout was exported more than sold here, so I’ve been wondering about sources in Australia and New Zealand. I forgot about Parker, good idea Paul. Mick, I haven’t belonged to Facebook for a few years, do you know how to otherwise contact Darryl White?

[Mick christie]

If your on Facebook look up darryl white in Queensland Australia. He should have what u need and ships international as well

[PaulCDF]

Parkers Indian Australia???
The exchange rate is good.

[pisten-bully]

Well...I'm on the hunt for another RH case! The attempt to repair was a failure, pre-heat and Tig simply caused more cracks... as predicted by others who have tried. It's difficult to tell a guy who's worked with aluminum for 30 years how to do his job, and I don't know if there's anything different he could have done, but there's not much I can do now:





I'm a little bummed out but figure it's part of the process, but I hate to see old parts not usable anymore!

So far I've checked a few possible sources, and Dana fed me a link to a full engine for sale (the seller changed his mind...) but so far the easy sources have nuthin'

[cHarley32]

It would be interesting how the Welder proceeds with the repair. If he does not hold process close. It would be great to see pics as it progresses. Have repaired motor mounts and tranny ears in the past. Curious how he minimizes distortions and such.

[tfburke3]

I dont know if your pinion bore andshaft dia. are same as 48 chief and up with the snap ring but if it is I think I would machine out the cracked bottom of the bore before welding.You will have less welding and the welder wont have bottom corners to hog out and weld,and less machine work.
Hope it works for you
Tom

[pisten-bully]

I think the line bore could be solved with boring the race fully and modify with a thrust washer and snap ring like later chiefs.
Lots of challenging welding before the machine work even begins.

I’m trying to remain optimistic, at least it would be difficult to find a welder with as much aluminum welding experience as this guy...so there’s that!

Thanks for the input, and Dana...good call to inspect the drive side of the case too.

[tfburke3]

I think the line bore could be solved with boring the race fully and modify with a thrust washer and snap ring like later chiefs.
Lots of challenging welding before the machine work even begins.
Tom

[d_lasher]

The mechanical engineer in me says all of your cracks are related. The pinion race takes half of the load from the drive train. The crack probably caused a lot of vibrations that caused your flywheel crack. I’d looked at your drive side race and case as well. My guess is that it’s at least out of round or cracked too.

The welds might have been a last ditch effort to save the engine.

If you decide to weld it back up you’ll need to come up with a way to keep the drive race and pinion race aligned. Welding runs the risk of warping the case. You can’t line bore it because the pinion side is closed.

Sorry man,
Dana

[tfburke3]

I cant say how important that flange in the pinion housing is but I have a few later chief cases with similar cracking,one down to the scraper hole.For me these case are beyond reasonable repair so they were replaced.
I would be looking for new cases or case if I were you but your 101 is more rare than later chiefs .
I would pull that front cam bushing suspecting the crack continues into its bore.
Good luck
Tom

[pisten-bully]

closer inspection shows that the repair weld on the flywheel side of the case is trouble, a crack has formed again:



I dropped the case off with a fellow whose business is welding aluminum almost exclusively, we inspected it together and he didn't say it was a lost cause ...so I've got my fingers crossed he can make a long lasting repair.