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Wanted - Yamaha RD400 Engine

Posted:
Fri Oct 22, 2021 9:01 am
by Brian Stevenson
As the title says, looking for a Yamaha RD400 engine.
Re: Wanted - Yamaha RD400 Engine

Posted:
Tue Nov 02, 2021 11:29 am
by akipin
I've got one or two RD400 motors that I got from a wrecker a bunch of years back in my basement.
It'd need rebuilding.
Cheers,
Andre
Re: Wanted - Yamaha RD400 Engine

Posted:
Tue May 27, 2025 10:39 am
by GearheadHarman
Are those still available , can you I am looking for one as I need some parts to rebuild my project bike.
Re: Wanted - Yamaha RD400 Engine

Posted:
Tue May 27, 2025 12:02 pm
by Brian Stevenson
I think I bought them.
I build 2, I may have some parts left over. What do you need
Re: Wanted - Yamaha RD400 Engine

Posted:
Wed Jun 25, 2025 10:22 am
by GearheadHarman
I need the stator and rotor and clutch bell housing
Re: Wanted - Yamaha RD400 Engine

Posted:
Mon Jun 30, 2025 9:19 pm
by Brian Stevenson
Do you know what crank it is for. The tapers changed over the years so you have to match the the stator with the end of the crank
Re: Wanted - Yamaha RD400 Engine

Posted:
Tue Jul 08, 2025 7:58 am
by GearheadHarman
Brian, I know its for 1A1
Re: Wanted - Yamaha RD400 Engine

Posted:
Tue Jul 08, 2025 9:11 am
by Brian Stevenson
Ah. Thats the 76 so it should have the short crank end.
The later ones had a longer/diffrent taper on the end of the shaft and you can also use a RD350LC, Banshee or even a YPVS stator on those. The oil seal is diffrent as well. Paul at PJME for the crank bits
I definitly don't have one of those as all my cranks are from the later bikes.
There is always aftermarket stuff like VAPE which is good stuff but not cheap.
Let me ask around. Have you tried the AirCooled forum in the UK. I see them come up for sale quite often.
Re: Wanted - Yamaha RD400 Engine

Posted:
Tue Jul 08, 2025 12:41 pm
by bitzz
The "different" taper is only found on the 3J7 (and the Australian equivalent), that comes with electronic ignition. The stator cover is different. The 3J7 was the Canadian Daytona... and the best RD400
... and the key is 90 degrees off the RD-LC and RZ. The TZ Hitachi ignition is "bolt on" to the early crank.
u/GearheadHarmon: I think I have those parts email me at: jim at bitzz dot com
Re: Wanted - Yamaha RD400 Engine

Posted:
Tue Jul 08, 2025 12:47 pm
by Brian Stevenson
I have a RD350LC stator my RD RD400 at the moment.