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RD400 Turns 50!

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#91
eBay/FB Marketplace/Craigslist watch / YWB RZ350 in Phoenix $7250 - i...
Last post by Yamanatic - February 13, 2026, 11:00:56 AM
- so I'll post a picture instead.

RZ350.jpg
#92
Turning Wrenches / Re: Most used gear oil and 2st...
Last post by Tropic-al - February 13, 2026, 10:51:44 AM
Thanks to all that replied with their choices.
Didn't mean to start an oil thread or poll, but I can see where everyone is proud of what they have chosen and use.
I'll see what's available around in my cycle shops and go from there.
Appreciate the input.
#93
Turning Wrenches / Re: Most used gear oil and 2st...
Last post by m in sc - February 13, 2026, 10:38:57 AM
I run the modern 4t oils because they are better lubricators, designed to deal with way more hp and clutch abuse. and readily available in synthetic form. 10w30 vs 10w40 isn't a significant change.  ive tried boutique oils,  and ive killed two rd transmission on belray gear saver. never again. for me. but as far as oils go.. I have to disagree. newer is usually better.
#94
Turning Wrenches / Re: Most used gear oil and 2st...
Last post by RDnuTZ - February 13, 2026, 10:12:41 AM
maybe I'm a blockhead, but I fail to see how running anything other than gear oil weight/viscosities recommended by Yamaha is helpful for 50+ year old 2 stroke engines. Newer isn't always better.
#95
Show Off / Re: Pipe dream (sorry)
Last post by 85RZwade - February 13, 2026, 08:42:14 AM
:celebrate: I picked them up last night, and it was a very nice experience. The seller and I know a lot of the same (motorcycle) people, and we got along famously. So of course, he's moving away.
He bought the pipes secondhand years ago for a grey market RZ250, but never used them, so good eye, Mark!
They're in very nice condition, seem kinda heavy and have no springs to pull them into the flanges  :umm:
I hope to fondle them some more this weekend, and maybe add a picture to the pipe identification thread.
#96
Turning Wrenches / Re: Most used gear oil and 2st...
Last post by 1976RD400C - February 13, 2026, 07:23:12 AM
Yamalube 2S in tank, 2R for premix, 4 stroke oil in gearcase
#97
Turning Wrenches / Re: Most used gear oil and 2st...
Last post by m in sc - February 13, 2026, 07:11:44 AM
lesson to be learned here:

anything modern and intended for purpose..... is just fine.  :toot:
#98
Turning Wrenches / Re: Most used gear oil and 2st...
Last post by RD350NL - February 13, 2026, 12:41:20 AM
Here we go again.

I run 2 stroke oil from Action, semi synthetic. 5€ per liter and flawless over 10k km's of hard driving on my 2 strokes. Also use their car 10w40 in my gear boxes, never had a problem in any of my classic and modern bikes.
#99
Show Off / Re: Pipe dream (sorry)
Last post by RDnuTZ - February 12, 2026, 08:13:22 PM
helluva good price  :thumbs:
#100
eBay/FB Marketplace/Craigslist watch / Re: Auction Suzuki RGB500 on F...
Last post by Simmons1 - February 12, 2026, 07:58:28 PM
Attempted quick flip until someone ponies up $35K