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Author Topic: '77 Yamaha RD400 "Jigsaw Puzzle"  (Read 1549 times)

Offline Redbird

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Re: '77 Yamaha RD400 "Jigsaw Puzzle"
« Reply #10 on: Apr 21, 2018, 11:27:51 »
Maybe watching this will teach me how to be a little more precise when I build.  Everything you do seems to be run over with a fine tooth comb. 

:P :P :P

Thanks guys ;D
When you are Dead, you don't know that you are Dead. It is difficult only for Others.

It is the same when you are Stupid.

Offline cbrianroll

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Re: '77 Yamaha RD400 "Jigsaw Puzzle"
« Reply #11 on: Apr 21, 2018, 11:58:17 »
Awesome.....i need to find an rd400....watching.

Offline CrabsAndCylinders

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Re: '77 Yamaha RD400 "Jigsaw Puzzle"
« Reply #12 on: Apr 21, 2018, 15:03:04 »
Lighter, Quicker, Faster.
ZX-14, 900F x 2, 1100F, R100, CBR600, SR500, GT500, RZ350, KZ1000 x 2, Moto Guzzi Lemans lll, CBX550, RD 350, 750 SOHC police special, RG250, TL1000R, GT750, KTM Super Duke 1290 R, Harris/Z-1, Norton 750 Commando, Green 77 KZ650

Offline Redbird

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Re: '77 Yamaha RD400 "Jigsaw Puzzle"
« Reply #13 on: Apr 29, 2018, 13:52:42 »

Finished up the last bit of stripdown on the RD400 parts that are heading for powdercoat this week.
Tires, wheel and headstock bearings, rotors, sprocket, etc., and removed the centerstand mounts.
This'll be kind've a "before" pic. When they come back I'll shoot another pic in the same position.
When you are Dead, you don't know that you are Dead. It is difficult only for Others.

It is the same when you are Stupid.

Offline JadusMotorcycleParts

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Re: '77 Yamaha RD400 "Jigsaw Puzzle"
« Reply #14 on: Apr 30, 2018, 14:49:55 »
Damn, excellent job getting a box of bits together again into a running engine!  Impressive.  Looking forward to following the progress  :)

Offline Redbird

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Re: '77 Yamaha RD400 "Jigsaw Puzzle"
« Reply #15 on: Apr 30, 2018, 16:44:43 »
Thanks for the kudos guys ;)

Well, last minute decision was made to remove the OEM footpeg mounts, and the seat hinges/lock bracket. Which means everything is still here ::)
I got everything cut off yesterday. Just need to go back with the flapwheel to smooth out the grinder marks.
Should still be heading to powdercoat by the weekend though.


When you are Dead, you don't know that you are Dead. It is difficult only for Others.

It is the same when you are Stupid.

Offline The Limey

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Re: '77 Yamaha RD400 "Jigsaw Puzzle"
« Reply #16 on: May 01, 2018, 11:50:56 »
Im in!
I was born a rocker.  I'll die a rocker.  And I'm proud of it.

Offline CrabsAndCylinders

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Re: '77 Yamaha RD400 "Jigsaw Puzzle"
« Reply #17 on: May 01, 2018, 16:16:15 »
I'm interested to see how you mount your rearsets.  The stock brackets are pretty ugly and heavy too, good to get rid of them.
Lighter, Quicker, Faster.
ZX-14, 900F x 2, 1100F, R100, CBR600, SR500, GT500, RZ350, KZ1000 x 2, Moto Guzzi Lemans lll, CBX550, RD 350, 750 SOHC police special, RG250, TL1000R, GT750, KTM Super Duke 1290 R, Harris/Z-1, Norton 750 Commando, Green 77 KZ650

Offline Redbird

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Re: '77 Yamaha RD400 "Jigsaw Puzzle"
« Reply #18 on: May 02, 2018, 17:29:30 »
The rearsets will mount where the passenger peg/exhaust hanger bracket bolts on. Those brackets are still there. I removed the front peg brackets that are under the motor.
When you are Dead, you don't know that you are Dead. It is difficult only for Others.

It is the same when you are Stupid.

Offline jpmobius

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Re: '77 Yamaha RD400 "Jigsaw Puzzle"
« Reply #19 on: May 02, 2018, 19:30:35 »
Those brackets are plenty strong and don't need to be tied into the swing arm pivot if you are planning on making new mounting plates for your foot rests.  You'll either need to get a shorter pivot bolt or add some spacers/washers to make up the difference though.  I know you have it all apart now, but looking at your assembled pics your side stand will be a problem.  Might be worth checking into it with the pipes on to make sure you don't have to do some sort of relocation of the mount for the side stand before you take it to powder.  I have seen more than a few examples where guys have simply bent their side stand to clear the pipe.  (lots of different pipes, but nearly all require some side stand surgery) This in itself is not too bad, but invariably results in the bike leaning over much farther than stock.  That is a real problem at least on the 350/250's because the sheet metal cross bar that the stand's bracket is welded to is too weak to withstand the extra force from the increased lean.  It ends up cracking and failing.  I don't remember if the 400's are the same.  In any event, it might be a good idea to give it a good look and maybe reinforce it before you paint it.  I have personally done this several times, and my solution is to cut it off, weld a larger, thicker pad under the mounting location and then weld the original mount back on.  It is a fair bit of work for such a simple thing though.  Hope you are also going to trim off those lumpy front stock pipe mounts - they look pretty obvious with chambers if left on!
Mobius


On a long enough timeline, the survival rate for everyone drops to zero.

1973 RD350 Yamaha build  http://www.dotheton.com/forum/index.php?topic=66498.0