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Old 06-28-2013, 07:33 AM   #151
craydds OP
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mo' stuff

Foot pegs on:


Kick stand on:


pic:


nother pic:


pic:


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'75 R90S
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Old 06-28-2013, 07:42 AM   #152
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test ride

Fired it up, rode it around the block:




Going to paint the old tank this weekend; working on polishing up the old plastics:




It is a running machine. Not yet ready for the desert, will get the plastics on this weekend, paint the tank. The carb is leaking out of the overflow tube - might be the float level or the needle/seat - easy fix either way.
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Old 06-28-2013, 08:03 AM   #153
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before and after

Old vs. new:




Took everything apart:


Cleaned it up:


Tiny motor, only 400 cc:


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Old 06-28-2013, 01:38 PM   #154
Scootern29
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It's looking real good Ray. Keep up the good work.
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Old 07-09-2013, 05:19 AM   #155
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desert ride

Took the bike out to the desert for a test ride on Sunday:




Got back to the house in one piece. Several adjustments were needed - brakes, shifter/rear brake lever positions, etc. Those bars had to go, too low when standing on the pegs. Put the old stock bars back on, tried to straighten them a bit. Got the side covers polished up and installed. Got a cool desert tank from Scootern29. Will get more pics later.
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craydds screwed with this post 07-09-2013 at 05:39 PM Reason: a
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Old 07-09-2013, 05:42 AM   #156
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Air Balance Tubes

Forks:


Made some air balance tubes. Upper chambers balanced:


Fork tubes:
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Old 07-19-2013, 04:47 AM   #157
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desert tank

Got a Malcom Smith desert tank from Scootern29. I think it holds 11 gallons of fuel.




Ordered a grommet for the petcock, arrived today. Will get petcock installed then go for a desert ride. Should be able to ride all day long on one tank:


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Old 07-19-2013, 09:58 AM   #158
JeffS77
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looks good .. are those the Fly Vintage bend bars ??

I have been running those on a few of my old bikes and they are damn comfy
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Old 07-19-2013, 10:02 AM   #159
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Originally Posted by JeffS77 View Post
are those the Fly Vintage bend bars ?
I think they are the stock YZ bars. They were on the bike when I bought it. I will look at those Fly Vinatage bars; might be something I'd like. These old bars are slightly bent - not too bad, it's rideable and I don't notice the tweaks. I just have a thing about bent handle bars.
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Old 07-19-2013, 03:17 PM   #160
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more work to come

Got the petcock on! Went for a desert ride.


Got an air box on order from vintage mx - http://www.vintagemx.us/cgi-bin/swapmeet.cgi - and new uni filter NU-2221ST air filters from Dennis Kirk. Always more work to be done.
Next big project: pull off the head and the cylinder and check the bottom end, it sounds like it is ready to grenade. Got a tip from my Yamaha shop about a local fellow who rebuilds the old 2-smokers; called him and he sounded enthusiastic, said to bring it over, said he can do ports and everything else. COOL.
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Old 07-20-2013, 09:10 AM   #161
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The tank looks like it cleaned up pretty well. With that much fuel you may have to ride over to 29 Palms for an Anchor Steam.
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Old 07-20-2013, 12:10 PM   #162
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Originally Posted by Scootern29 View Post
The tank looks like it cleaned up pretty well. With that much fuel you may have to ride over to 29 Palms for an Anchor Steam.
That is a groovy tank. Thanks, Scott! Get those Anchor Steams in the fridge, here I come. Gonna go out to the garage now and pull off the head and cylinder - time to inspect the bottom end. Yeah, I know it sounds bass-ackwards, but I wanted to get the bike back together and ride it, now gotta pull the motor out and rebuild it (most likely). There is an unmistakable knock-knock-knock at low rpm, sounds like rod/crank is ready to grenade.
edit: Also, thanks for the tip on the air box. It should arrive soon, be a good time to install it with the motor out (I think). Will bug you for tips on air box installation.
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Old 07-20-2013, 02:10 PM   #163
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Just an FYI. I picked up a comlete gasket set from DC Plastics for $50. Very good quality and fit.

www.dcvmx.com

You will need to undo the shock and maybe take the rear wheel off to get the airbox in.
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Old 12-03-2013, 04:29 PM   #164
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Quote:
Originally Posted by Scootern29 View Post
Just an FYI. I picked up a comlete gasket set from DC Plastics for $50. Very good quality and fit.

www.dcvmx.com

You will need to undo the shock and maybe take the rear wheel off to get the airbox in.

I just found this forum and have read the entire thread on restoring the YZ400.
Now since I just joined the forum yesterday, and this is my first post, I assume I am not entitled to post pics yet.

Anyway. I have a 1976 YZZ175 and after reading about the missing threads in his flywheel I removed the cover to look at mine.
I am not missing any threads, but am missing a flywheel!

Why did the 400 use a flywheel and the 175 just has a small rotor?
Anyone know?
pg
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Old 12-03-2013, 04:41 PM   #165
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Quote:
Originally Posted by piniongear View Post
I just found this forum and have read the entire thread on restoring the YZ400.
Now since I just joined the forum yesterday, and this is my first post, I assume I am not entitled to post pics yet.

Anyway. I have a 1976 YZZ175 and after reading about the missing threads in his flywheel I removed the cover to look at mine.
I am not missing any threads, but am missing a flywheel!

Why did the 400 use a flywheel and the 175 just has a small rotor?
Anyone know?
pg
internal rotor flywheel on 76 yz175, makes for a more zippy motor. the 73-75 mx/yz250 (+ many more) also had internal rotor (but they aren't interchangeable with yours..) . fortunately there are tons of options/ways to switch it to external if you want.
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