Dead RD400 resurrection

[JBeasty]

Thanks Guys. I should know better by now to question the manual if things aren't looking quite right!

[JBeasty]

How important is this tab washer/sprocket plate thingy? Other than covering the huge snap ring and providing tabs (nonexistent) to lock the nuts, does it do anythings else? Is there a concern with that snap ring being exposed? I was just going to use washers and lock tight.

Also, I have the 2 Sprocket spacers from Economy on there (for the 520 chain conversion), but there is still a tiny bit of play. Is that normal?

Thanks for any insight.

[m in sc]

not terribly important but if you arent going to run it, run some thin nylocks or something.

or:

https://yambits.co.uk/rd400c-sprocket-lock-tab-rear-p-51906.html

[soonerbillz]

I wouldn't be confident without that snap ring covered. God forbid something snags it.
 It would be my luck.

[m in sc]

that snap ring is extremely robust, nothing will snag that and remove it.

[rodneya]

Pretty sure that lock plate is made like that to hide the snap ring and make that area look cleaner.

I have a spoked 400 rear hub with a spacer behind the sprocket, so it uses bolts to hold the sprocket on.
last week my bike started making a noise and vibrating just before home. Locking tabs were probably a bit loose and one bolt backed out and demolished the adjuster.

[JBeasty]

Pretty sure that lock plate is made like that to hide the snap ring and make that area look cleaner.

I have a spoked 400 rear hub with a spacer behind the sprocket, so it uses bolts to hold the sprocket on.
last week my bike started making a noise and vibrating just before home. Locking tabs were probably a bit loose and one bolt backed out and demolished the adjuster.

Not sure if you've remedied this, but I have an adjuster I won't be using that you can have.

[rodneya]

Pretty sure that lock plate is made like that to hide the snap ring and make that area look cleaner.

I have a spoked 400 rear hub with a spacer behind the sprocket, so it uses bolts to hold the sprocket on.
last week my bike started making a noise and vibrating just before home. Locking tabs were probably a bit loose and one bolt backed out and demolished the adjuster.

Not sure if you've remedied this, but I have an adjuster I won't be using that you can have.

Thanks for the offer, but I had a spare in my junk bits stash that I managed to get straightened out enough to use.

[JBeasty]

Has anyone ever fit this VSM6 Airtech seat pan to an RD400? I've got a birthday coming up. Looking for things to put on my wish list.

[svgarage]

I purchased a seat that is similar to what you want. My solution was to braze pins to the frame and pin the pan in place. I cut the pins down to size and suspended the seat with rubber stoppers.

[JBeasty]

Very nice! I went ahead and ordered the Airtech seat. I know I'll have to do some sort of fiberglass fabrication to make it work. My hope is to use the stock seat hinges, or some sort of quick release mount - so I can have easy access to the oil tank.

[JBeasty]

Made a bit more progress. Rear wheel mounted and centered with spacers I made. Chain lines up nice. Got the front wheel mounted, but I'll have to make another 4mm spacer for the disk, and possibly shim the caliper out a bit, or grind it. As it is, the caliper hits the rim, and the disk does not line up within the caliper.

[Kawtriplefreak]

Looks great  

[m in sc]

yeah man, looks good.

[85RZwade]

Coming along very nicely