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Just got carb bowl screws and intake boot clamp screws from KM Carburetor on eBay.
Genuine JIS with the dot on them. Packaging is top of the line and the cool logo sticker will have to go someplace special where people know what the JIS screw heads look like and have the right screwdriver to use with them.

Ready to go into my carbs a few more times as jetting gets sorted out - yet again.

Would have been good to have a JIS screwdriver 40 years ago, (says the old fart).

Discovered some more tuning to do. The 2.5 slides with UFO's in the bottom of them were pulling more fuel. So that forced dropping the needles 1/2 step. Then too much congestion at throttle just starting to open. Opened the air jets to 3 turns out and still too much. Next step is one size down on the pilots. HOWEVER, I saw the wiring collection from the generator/ignition side had migrated back toward the chain  Doesn't look like it's touching the chain yet. No prob, I'll dig it upward and zip tie it safely before things get bad.

They already were. One white gen wire completely sawed apart. How was it running with no problem whatsoever with old style headlight bulb and a dinky alarm battery?
How can any wire in the RD400 wiring harness be open and there's no problem?

Went to raise the needles with a 1/2 step washer this evening and realized it would be wise to order fresh screws. I have JIS screwdrivers and one of the screw heads is still a little too far gone.

Those two screws that fasten the "clip" assembly that holds the needle down in the slide and also grabs the end of the throttle cables... RD400 VM28 round slide.

Looked at JetRUs, eBay, Yambits, etc.
Where can I get a set of 4?

Wonder what he did to make the wheels look that good.

https://www.ebay.com/itm/185675789995


EDIT: shortened link

Not normally into wee 2 strokes, but would love to have this in the protection of my garage. Didn't know about it before, but how cool!

https://www.youtube.com/watch?v=jMWAVKWliXg

Completed the job except for break in and carb re-tune.  The blue cloud upon 1st start up was the best.
Runs great, except intentionally rich right now.  Never snapped, crackled and popped at idle, but sure does now  :)
Front wheel lofts in 1st gear without effort. Will have to re-jet and see where it is after some break in.  Chuck did a careful and good looking update porting/compression-pee-hole-plug job so I could run it with good success on the stock pipes, which are still in very good shape.
Using FPP's right now.  Front wheel RD350 with drilled rotor, 'cuz lighter weight on the front is a good thing.

Looks like it runs:  https://charlotte.craigslist.org/mcy/d/matthews-1972-yamaha-200-cs5-electric/6898798501.html

Surely there are some Ebay Chinese shocks that bolt on to the RD400 - that are also a decent improvement over old stockers.
Anyone have a good suggestion?

My lower back could stand a little better performance and better handling would be appreciated.

I saw retaRD's LÖLins  in the DG swingarm thread...  The light bulb came on.

Having split the cases, it appears that the bearing at the drive sprocket has been spinning.  That can't be good.  Shiny aluminum showing in the pocket and a ridge I can feel to the rear. 

Should I use a little Loctite of some sort?
 
Remembering having to use it on the H1 triple crank bearings long ago [Why do I remember that from 36 yrs ago?  Because I used a little too much, locked down the crank and had to take it apart again]:

Split the cases today to change seals.  Not wanting to waste that good money spent on Chuck doing an update porting job on the RD400.
Someone has been in here...
Anyone know a good source for this screw?

GT380 for those who have time and a little to spend in the budget:

https://charlotte.craigslist.org/mcy/d/state-road-74-suzuki-gt-380/6855750516.html

North of Statesville, NC