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It's about time I did something with this

Started by 1976RD400C, June 07, 2020, 03:01:07 PM

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1976RD400C

5 years ago I bought this and rode it a few times. I even took it to the Vintage Bike Day in Woodstock that summer. Then it sat in the corner of my garage. I just retired and have time to do things I want to do now. The thing is all original other than the air filters and handlebars. The motor has never been apart. The chrome is kind of minty. Full tear down, motor freshen, paint job, and restore to all original is next.

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'76 RD400 green  '76 RD400 red   '84 RZ350

SoCal250

Looks like a pretty good starting point.  8)
75 Yamaha RD125B   75 Yamaha RD125B (project)
75 Yamaha RD250B   75 Yamaha RD200B (project)
73 Yamaha RD350     77 Yamaha RD400D   79 Yamaha RD400F  
91 Yamaha TZR250R  89 Yamaha FZR400   05 Yamaha FZ6   
05 Yamaha XT225TC  82 Honda MB5  02 Aprilia RS250 Cup (sold)

bostontrackrat

Yeah, great starting point!!  Something that clean should make life easier on you.  Make sure to post lots of pics!

mnein


2steve

Just like 3-finger Bill's bike, mnein.
I have an emotional Oak Hill race track attachment to stock red '76 RD400's.
Sweet bike, nice toy to tinker with!

mnein

2 Steve I bought that bike from Bill and owned it a couple years. It was a pristine bike, loved everything about it. Sold it for RZ's. A few laps at Oak Hill with it.

1976RD400C

Well, I was wrong about it never has been apart. On piston was .50 and one .75. Crank seems nice and tight. Ports look untouched. Here's an example of a machinist screw up. They didn't allow for enough honing to remove the fracture marks from the boring bar cutting tool.

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'76 RD400 green  '76 RD400 red   '84 RZ350

SUPERTUNE

I wonder if the modified air filters had anything to do not getting the jetting right?
Unfortunately I've seen a lot of that...if you don't have anyone local to do the job let me know. Boring work is almost 2-3 times a week affair here in the shop. 
Chuck
RD machine work, boring, porting, cranks and engine building.


Chuck 'SUPERTUNE' Quenzler III
Team Scream Racing LLC
1920 Sherwood St. STE A
Clearwater, FL. 33765
cqsupertune@tampabay.rr.com

1976RD400C

Moving along. The brakes were a disaster. Complete rebuild needed. I want to get the black paint right. What is flat or statin? Looks like the triple trees, rear caliper holder, calipers, and master cylinders? Everything else gloss, frame, swing arm, headlight and ears, foot rest bracket, kickstands, chain guard, and battery box? PJ1 engine case satin good for those flat black parts?

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'76 RD400 green  '76 RD400 red   '84 RZ350

1976RD400C

She is cleaning up and going back together nicely. All original right up to the air box. I may put a Dyna ignition on it. I found a set of beautiful exhaust pipes.

20200727-143654" border="0
'76 RD400 green  '76 RD400 red   '84 RZ350

Czakky


SoCal250

75 Yamaha RD125B   75 Yamaha RD125B (project)
75 Yamaha RD250B   75 Yamaha RD200B (project)
73 Yamaha RD350     77 Yamaha RD400D   79 Yamaha RD400F  
91 Yamaha TZR250R  89 Yamaha FZR400   05 Yamaha FZ6   
05 Yamaha XT225TC  82 Honda MB5  02 Aprilia RS250 Cup (sold)

paul1478

that is gong to be sweet. The pipes look new. good find.
76 Team Scream RD400
1993 FJ1200
2006 Goldwing
2022 Ducati V2 Panigale

toffee

Its always easier to start with a complete bike thats in fair to good condition.
You are making good progress!!
"An object at rest stays at rest and an object in motion stays in motion..." - Newton's 1st law of Motion

rd400greenhorn

Looking good!
Iam also in the process of restoring a old rd400, powder next week.
Its always good to put things back on a freshly painted frame