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what a nice bike👍👍👍👍👍

Beautiful work......well done!!!

RD 350 , come back soon ... 😂

Where can i get the Software for the Chamber construction? Is it possible to get a technical drawing of them?

Nice work! You make it look pretty easy ;-)

Why no sealant is used on any of the gaskets?

Sir, I need RD 350. How is it possible. Please accept my order. Totally Restoration. New need it

Dear Sir Good work. Appreciated your work

That is Ninja 500R power level from a 1960s engine design. Impressive. Sounds like 12K RPM?

Beautiful. You display talent of which I can only dream. Off-topic, but please advise what you use for swingarm bearings?

I was working at a Yamaha shop in 1975 and the 1976 Yamaha RD400 was released. Yamaha had an abundance of leftover 1975 RD350's and I bought one in the crate for $740.00. I had great times on that bike, it was quick and reliable and never fouled a plug. Thanks for your video and the memories.

Absolute beaut.Nothing better.

I'm so frustrated....

Hi I have a 74 rd250 with chambers, y boot uni, crossover port & boost bottle, pwk 28 could you tell if my mikuni jetting was 155 main , 27.5 pilot what would that be on pwk

How much price this valve seat cutting tool set

Thank you

Pls someone help me out...

50 yr old ~Mikunis Don't flow well enough to warrant Using the things, Upgrade to Keihins.

this is probably the best and most thorough video on a 2 stroke bike I've ever seen

No Sound....

What a beautiful restoration

Very nice I've just a RD350B going to do the same thing to mine

I replaced the shifter forks on one of those. However, I was living in a bed and Breakfast in London England. The Landlord was not happy when he found the engine under my bed.

Hi Stan - Impressive! Question for you. I have inherited an RD350 that has been sitting since the mid 80's. Engine is stuck and I need to try and manually turn it. I've added lots of penetrating oil, taken off the flywheel but don't now what to attach to the crank shaft to try and manually turn. Any advice??

Smooth

THANK YOU HARTLY This video maybe will change my life. I am trying to buy a cb 350 fuor of 1975 and I would study by my self this byke, with some helps… :-)

I noticed that drill size was stated as 10 mm, but the thread size is M10 x 1 mm. Shouldn't the drill size be smaller than 10 mm, or am I missing something?

Masya Allah...like that bike

Built my racing RD400 back in1981 down here in South Africa. Did all my own porting, pipe calculations, etc after studying a book by Gordon Jennings, Two Stroke Tuners Handbook. Was always amazed how the engine did exactly what the calculations said it would. My own idea was fitting 32mm Mikunis and reedblocks from the YZ. They were power jet carbs that had 2 main jets that opened at 1/4 throttle and then at half throttle for better mix through the range. Won a number of races with it and always mixing it up with the "big boys"..

great job chap

Interesting. I did the same to a 350B engine in a 250C chassis back in the day. We probably optomistically guessed it was around 60 hp, but never had it dynoed.

Hey man, thanks for the great video. What reed valve do you recommend for a 77 rd 400. The original ones seem too small to me. But maybe l am wrong. I am thinking of putting 32 mm carbs on also. Someone mentioned yz85 reed valves or rz350, with reeds spacers and opening the intake to be able to make them fit. Do you think getting one of these ones or just getting carbon fiber or another material reeds for the stock ones. Could you please let me know what will work better for more power. Cheers

also what are those added on hose fittings on the primary cover?

I want to know what pistons and cam you are using and where to get them

A huge piece of gold you have there sir. I would love to own one as fine as

That was my first bike a 1973 I purchased in 1975. I did not understand what I was buying. I loved that bike because it was so much fun.

Thank you so much for the time put into this I’m going to be copying your oil cooler design

Awesome Stan, takes me back to the 80's brilliant stock bikes but tweeked were awesome, we used to have a tuner in the UK called Stan Stevens, reknown for Yamaha tuning.

Heat head and freeze guides

Hey stan I would love that you build my rd350 1975 , Also being ur apprentice I would love that

Brilliant helpfull video . Does the ignition use a battery ?? The tuning software , expansion pipe design ??

I won an rd400g and restored it, it took 8 years…. Also accumulated a ton of spares, I have two spare engines and a frame, I’m thinking about doing a track bike out of those…. My skills are far from yours so probably let a pro do the porting.

Unfortunately, I did the opposite back in the late 70s. Thanks for giving this one new life. Great job. Rear sprocket looks different as I recall.

Superb..

Fascinating. I owned a 400DX bought new in 1979 and did a bit of work to it and it was pretty quick but I didn't modify the porting to shift the power band to higher rpm as the long crank length would stress the stock pistons. The most insane RD400 I ever rode was a full race tuned model (or maybe even beyond race tuned). The barrels had been jacked up at least 3-4 mm and this thing didn't even start to make interesting power until around 8000 rpm and would pull all the way to around 11,000 rpm indicated (way past the stock red-line). My friend let me ride it and it was insanely fast - it absolutely smoked a Kawasaki 4-cyl Z650 which in its day was quite a fast bike). Revving to that level however, was not good for the pistons or crank and the pistons did let go at some point . . . . they had been radically modified with the skirts cut away and the metal between the "holes" removed.

Vakwerk 👌👌👍

delicious

Great sound you must be happy😊

Really impressive work, Stan. As usual

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