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Author Topic: RD400 - Back from the Dead  (Read 15184 times)

Offline AimlessMoto

  • Posts: 156
  • Blood, sweat and beers.
Re: RD400 - Back from the Dead
« Reply #90 on: Aug 01, 2017, 08:25:59 »
And we are back together. Starting to look good. Much better than when I picked it up. I think it'll get tossed back into the frame before going any further.

Offline advCo

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Re: RD400 - Back from the Dead
« Reply #91 on: Aug 01, 2017, 13:45:30 »
Much better. Nice work.
"He broke the mirrors off his Cadillac, 'cause he doesn't like it looking like he looks back."

74 CB360 - Luna - http://www.dotheton.com/forum/index.php?topic=63294.0 - Sold
82 GS550L - Tracker-ish - http://www.dotheton.com/forum/index.php?topic=67229.0 - Sold
74 XL350 - The Turd - http://www.dotheton.com/forum/index.php?topic=70252.0 - Sold
Suzuki FA50 "No-Ped" - http://www.dotheton.com/forum/index.php?topic=71189.0
73 Suzuki RV125 -http://www.dotheton.com/forum/index.php?topic=73875.0
'97 BMW F650st - http://www.dotheton.com/forum/index.php?topic=75732.0

Offline CrabsAndCylinders

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Re: RD400 - Back from the Dead
« Reply #92 on: Aug 01, 2017, 15:29:12 »
Well done!
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 AimlessMoto

  • Posts: 156
  • Blood, sweat and beers.
Re: RD400 - Back from the Dead
« Reply #93 on: Aug 02, 2017, 11:44:20 »
Thanks guys!

Offline AimlessMoto

  • Posts: 156
  • Blood, sweat and beers.
Re: RD400 - Back from the Dead
« Reply #94 on: Aug 03, 2017, 11:21:05 »
In the frame! Now I just have to finish painting the engine mounts and peg mounts to finalize.

I was able to get everything plumbed as far as Tach cable, throttle/pump cable, alternator harness and points (with new points and condenser), all the breather tubes for the carbs, transmission vent, etc. I'm waiting on getting the mounts in before I finalize the airbox boots and torqueing the heads to 15lbs. Then I will do a squish test. I'll have to wait to clean up the harness and install the battery before I can time the thing. I don't have a dial gauge that will rest in the plug hole. I could, however try to make something work. We'll see.

Offline Uglyrabbit

  • Posts: 62
Re: RD400 - Back from the Dead
« Reply #95 on: Aug 04, 2017, 06:48:32 »
Keep up the good work, it looks great!


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Offline TranceMachineVienna

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Re: RD400 - Back from the Dead
« Reply #96 on: Aug 04, 2017, 08:46:12 »
make sure to bleed these oil lines from the oil pump before yu run it :-)

Offline AimlessMoto

  • Posts: 156
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Re: RD400 - Back from the Dead
« Reply #97 on: Aug 04, 2017, 14:31:07 »
make sure to bleed these oil lines from the oil pump before yu run it :-)

Yup! Gotta shim the pump and install the oil tank. Hopefully this weekend!

Offline AimlessMoto

  • Posts: 156
  • Blood, sweat and beers.
Re: RD400 - Back from the Dead
« Reply #98 on: Aug 14, 2017, 10:41:35 »
Lots of progress this weekend. Decided to do something a little different with the wheels and do a hybrid XS650/Daytona sort of look... polished the ribs, taped them, and spray-bombed them gloss black. I absolutely love how they look... also re-finished the disc hubs the same way (like stock).

I also got my shims in for the pump and it's now gapped to .010 at full swing at idle. Once that was sorted I threw the pegs and exhaust on, as well as both of the kickstands and springs... now it's finally held up under it's own two wheels for the first time in a few months!

Lastly, I got the brakes rebuilt, but the front one leaked like crazy out of the pistons. There was simply too much corrosion damage to keep a tight seal, so a brand new front caliper is on order. The rear one is holding up well so far, looses a little pressure over night, so there's probably still an air bubble in the master cylinder or in the top of the line. Going to vacuum bleed it after the rear wheel is fully installed.

Offline AimlessMoto

  • Posts: 156
  • Blood, sweat and beers.
Re: RD400 - Back from the Dead
« Reply #99 on: Aug 21, 2017, 15:52:49 »
New front MC and Caliper with steel braided line installed. Not getting the feel I want, going to take a while to bleed I think. Might try to reverse-bleed, or take the pads out and make sure there's no air behind the pistons.

Wiring harness back in. Made a new dedicated ground out of some 10ga wire from the engine, to the frame, to the negative on the battery.

Got everything to work, all the bulbs are good... only problem is the flasher isn't really doing anything. It'll flash left, sometimes, but won't flash right, just stay on. Took the flasher unit apart, seems to be OK... might just be to low voltage with the bike not running.

I bypassed the resistor on the new coils (as suggested by the manufacturer) and I'm getting spark... all-be-it a small-ish purple one. Again, may be due to the point gap... condensors and points are new, so should just be in the adjustment. Waiting on a 2-stroke adapter for my dial gauge to come in so I can properly time it. Going to shoot for 1.8mm BTDC as everyone seems to have good luck there.

Tank is currently soaking in vinegar, already looks amazing... just going to drain it and coat it with some 2 stroke oil on the inside until I'm ready to install it. New petcock will be fitted as well.

Getting there! Oil in the trans, bled the oil lines for the injection system... it's been sitting 3 days and no bubbles have occurred, so hopefully that means the ball-valves are good and there are no air-leaks. Battery is fully charged. Carbs are synced, pump is adjusted.

Only electrical problem I have is that the kill-switch is dead... so I just taped a jumper into the connection. I'll deal with this down the road.

Last on the list:
-Set the tire pressure.
-Set the points and timing.
-Get the dent out of the speedo housing and refurb the gauge bracket and housings. 
-Nut-and-bolt check the entire bike.
-Try to start it.
-Adjust idle, carb balance, air screws if it starts and runs.
-Check for gremlins.
-Break it in.
« Last Edit: Aug 21, 2017, 15:55:36 by AimlessMoto »