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That's pretty sweet! Is that the factory 75cc engine? Rare bird if so.

For stubborn studs, if there's access, I like gronking down on the stud in my vice and using the case to get more leverage and torque the stud out.

I love a good Frakenbike, and I love how yours is coming together. Keep up the good work!

Not mine of course. Hard to say if it's worth it, if you'd want to restore it, as I'd imagine finding plastics would be daunting. But it would be fun!

https://losangeles.craigslist.org/ant/mcy/d/clermont-1988-honda-ns125r-ns-125/7826067176.html

It's an astonishing amount of work, and according to google translate, still 90cc.

"This is a modified 2-stroke 90cc para-twin Yamaha HS1. It looks like the cowl is also coming out. 2021 Taste of Tsukuba It was displayed as an OSR-CDI demo car at the autumn Taste of Tsukuba swap meet venue."

Whoa,cool!

Not mine, of course. What a tremendous bike!

https://boston.craigslist.org/bmw/mcy/d/wrentham-1985-harris-performance-uk/7764230141.html

Not mine. Looks like a really nice bike for very little money. Plus 2 spare engines.

https://washingtondc.craigslist.org/mld/mcy/d/silver-spring-1972-r5-yamaha-350cc/7744065768.html

A rare bird. I'm not sure I've ever seen one come up for sale in the north east.

https://newlondon.craigslist.org/mcy/d/pawcatuck-1989-yamaha-tdr-250/7660812491.html

FWIW, the stroke and the cylinder stud spacing of a CR80 Elsinore is the same but the transfers on the CR80 are much bigger compared to the MB5 and the case would need a fair amount of welding to seal the cylinder base. The mouth of the MB5 case would also need to be opened up to accept the lager CR80 spigot. It's doable, but not bolt on.

Quality advice! Thank you.

Mark, it is a '73.

And fwiw, I found these on Yambits that I like the look of.

https://yambits.co.uk/rd350-clutch-spring-bolt-kit-p-69638.html

Jon

Greetings lads. I'm in the process of reassembling an RD350 engine. I'm at the point of installing the clutch and I have a few questions, if I may.

I noticed that the outer clutch basket has quite a bit of play re. the cush assembly. The basket will rotate freely of the drive gear, with maybe 30* of rotation. My experience is not with RDs but I'm of the opinion that any play is excessive. Could anyone shed some light on that for me? Is this fine/ normal or is it worn out like I think it is?

Second, to my embarrassment I found a stepped thrust washer that I'm not exactly sure the placement of. Is it between the basket and the case, or the between the 2 baskets? And can you enlighten me which way the step side faces?

And finally, in disassembling the engine I was force to drill the head off one of the clutch bolts. I think it would be prudent of me to replace them as a set but in my lackluster searching I haven't found any that I've been too excited about. So, where would you recommend I look for a set of clutch screws?

Thank you very much
Jon

https://smd.craigslist.org/mcy/d/lexington-park-1984-yamaha-rz350/7488340898.html

It looks well done.

https://albany.craigslist.org/mcy/d/albany-2006-gsxrd350/7485565535.html

A little late on this conversation, but just regarding MB5 suspension, YSS do a emulator type valve that will fit the MB5 forks. Which is fun, and does make a pretty big difference in how the bikes handle. More pertinent info here.

https://www.planetminis.com/threads/xr100-mb5-fork-interchange.185506/