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  #16  
Old 04-26-2004, 10:48 PM
Dalem's Avatar
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Default Re: 79 yz400

Very Nice and a Rocket too I bet.
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  #17  
Old 04-28-2004, 01:50 PM
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Default Re: 79 yz400

It's not real fast as in top speed maybe 75-80. It's more of a stump puller. The gearing is real low and that's better because i ride mostly tight trails/ single track
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  #18  
Old 04-28-2004, 02:50 PM
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Default Re: 79 yz400

Looks nice. My first bike was an 1980 YZ250 that someone had let fall apart - I fixed it up a bit. This was in 84, the thing was bullet proof. I even used 10w 30 for pre-mix when I ran out and it didn't bat an eyelid!
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  #19  
Old 04-28-2004, 05:06 PM
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Default Re: 79 yz400

Reminds me of the days and my '81 YZ-465...man that was a fun bike!
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  #20  
Old 08-02-2004, 05:31 PM
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Default Re: 79 yz400

I have every part , except the frame for a 78 YZ 400, watcha need?
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  #21  
Old 08-04-2004, 07:30 PM
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Default Re: 79 yz400

Nothing right now, thanks.
I've got everything i need for the engine re-build, as well as the new side cover, but if I run into anything I'll be sure to llok you up.
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  #22  
Old 09-09-2004, 09:49 AM
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Default Re: 79 yz400

Just a bit of an update
This is it's current condition before paint.
I did decided to rebuild the engine and trans, good thing as the right side crank seal and left side crank bearing were toast.
As for the second drain plug thing that was the neutral indicator pin thing.

All the parts are here and I've just got the crank back. I hope to have the engine together within the next couple weeks.

In the mean time I stripped it down again. I replaced the sterring head bearings and all new cables. in the pic you can see I've started polishing the engine brackets and swing arm. I thought it was all steel but it was just badly corroded aluminum. you can also see the rear fender bracket is busted off so I'll be welding on a new one and re painting the frame before the engine goes back in.
I also found out you can't paint the fuel tank, well you can but it won't stay on there. I ended up stripping all the blistered paint off.
This has turned into a much bigger project then I thought oh well it will be worth it.
I'm just not sure now if I want to keep it for dirt or convert it over to a super moto bike.


Last edited by hardlydangerous; 09-09-2004 at 09:54 AM.
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  #23  
Old 09-09-2004, 10:28 AM
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Default Re: 79 yz400

Lookin good Hardly!!!
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  #24  
Old 09-09-2004, 02:08 PM
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Default Re: 79 yz400

I agree. You got it looking fantastic. I also think you'll kick yourself on down the road if you motard it. Be sure to give us some pics along the way!
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  #25  
Old 09-09-2004, 08:35 PM
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Default Re: 79 yz400

That's cool. My bro had an 83 YZ250 and that bike was awesome.

Good luck with it, and yes, keep us posted.
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  #26  
Old 09-13-2004, 01:18 PM
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Default Re: 79 yz400

Thanks guys

Heres the latest pic. I'll post a few pics along the way.
Frame is painted (touched up), polished swing arm and and all new chain rollers and guide components are on, new fender bracket welded in place, as wells as the polished bars. The engine I decides was not going back in stock, so I spent about 7 hours porting it yesterday. Just basic stuff ands i'll mill the head to bump up the the compression a bit to compensate

I'll get some pics when it's done

As soon as the engine is in I'll tear down the forks abd rebuild them, one seal is kinda leaky plus my front tires needs a tube and a few spokes.




BTW
Anyone ever heard of a tire filled with tennis balls instead of a tube?
I just changed the rear tire on a Kawaski 70's G5 and instead of a tube it was stuffed full of green and orange tennis balls.
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  #27  
Old 09-13-2004, 01:22 PM
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Default Re: 79 yz400

Wow.....that is a new one on me man. Tennis balls....someone was a bit hard up for cash and had waaaay too much time on their hands lol.
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  #28  
Old 09-13-2004, 01:38 PM
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Default Re: 79 yz400

There are a couple of aftermarket companies selling balls for tires now. Moose may be one of them.
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  #29  
Old 09-13-2004, 08:42 PM
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Default Re: 79 yz400

Suppers ready



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  #30  
Old 09-17-2004, 04:23 PM
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Default Re: 79 yz400

HELP
Well I ran into a big problem.
The old seals that came out are nothing like the new style of OE seal.
And now I have no idea the proper way to install them, Yamaha tech's can't say for sure and many of the other guys i've asked say two different things.
Some say the tab side (castle side) faces the crank
other say the castle side faces out.
I've looked at a couple parts fishe cards but can;t tell by the picd.
Until i know for sure this engine is not being put back together.

I'm guessing you the castle side faces in towards the crank and the brown part of the seal is there for heat purposes or something? Why because the right side crank seal has two retainers that keep the seal in place and don't fit real well on the tabs on the castle side.

Right side crank seal







left side crank seal




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