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Old 03-27-2010, 10:01 PM   #46
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Well the "Donor" bike has given up the parts and will now serve as a mockup for the expansion chamber fabricator.
Some of the progress... No need for base gasket, right??



Water had been in the bottomend for awhile!!





The empty cases, cylinder and head are placed back in the donor frame. Going to the pipe builder next month.
This will make the pipe fit right



Forks are the next job... There was at least 2 ounces of water in each side!



Cleaned and waiting for new seals.



Once the new piston ring arrives Monday and I make sure that it "IS" the right one, the cylinder will be off to Wisconsin for chrome bore repair/replating.
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Old 03-30-2010, 09:05 PM   #47
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Main seals

Have you found new main seals? if so where I need a set for my 1971 DT-1E ,any help would be appreciated. Thanks Rod
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Old 03-30-2010, 09:45 PM   #48
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Quote:
Originally Posted by RodT
Have you found new main seals? if so where I need a set for my 1971 DT-1E ,any help would be appreciated. Thanks Rod
Hey Rod, I called a bearing shop in Spokane and they have a seal that measures close to size I need. Don't have my notes handy, but it is a discontinued seal from Yamaha. NW Vintage Cycle parts has one for $46. The one in Spokane is $5.50. Same OD and ID, but 2mm thinner... I'm gonna give the cheapie a shot.
Being in Calif., there should be lots of bearing supply businesses around, just call them with the seal (or bearing) number ie. SW-42-72-10 for a seal or 6204 for a bearing (not the right numbers, but they are on your seals and bearings).
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Old 03-31-2010, 04:19 AM   #49
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Complete engine seals and gaskets are all over ebay for them things. Cheap too.
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Old 03-31-2010, 12:17 PM   #50
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Quote:
Originally Posted by vanrooster
That's a nice project you've got going there. In regards to Little Fauss and Big Halsy, a quick Google video search finds the entire film available for free streaming. Quality's a little low, but the Johnny Cash song over the intro is awesome if nothing else... back to the bike, anyways
Where did you find it online to watch?
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Old 03-31-2010, 12:35 PM   #51
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E-bay

I have been looking on E-bay and I can't find any main engine seals anywhere, some gaskets,but there not for a 1971 250. differant mag cover gasket. if you see some more ,Please E-mail me. Rod
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Old 03-31-2010, 12:38 PM   #52
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Quote:
Originally Posted by RodT
I have been looking on E-bay and I can't find any main engine seals anywhere, some gaskets,but there not for a 1971 250. differant mag cover gasket. if you see some more ,Please E-mail me. Rod
Isn't a '68-'71 DT1 all the same? If it's a different mag cover then it would be a DT2.
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Old 03-31-2010, 12:40 PM   #53
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Quote:
Originally Posted by Donzzilla
Isn't a '68-'71 DT1 all the same? If it's a different mag cover then it would be a DT2.
Just searched dt1 seals and got this.

http://cgi.ebay.com/ebaymotors/Yamah...Q5fAccessories
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Old 03-31-2010, 01:05 PM   #54
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Dt-1

Thanks for the lead, I was on last night and couldn't find a thing. My mag cover gasket has 3 bolt holes, and the ones I've seen on e-bay only have 2 holes, and they say there are 2 differant ones for the DT-1's. Thanks again Rod
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Old 03-31-2010, 06:39 PM   #55
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Old Yamaha

Good to see I am not alone.

I'm closer to being finished.

Website below has a bunch of before and progress pics

Keep it going !
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Old 03-31-2010, 08:38 PM   #56
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Great to see this thread! The DT1 was my second bike and it introduced me to off-road riding. I met my wife's uncle about ten years ago, we got to swapping stories about bikes and some of mine were about that DT1. He takes me out to the garage, pulls a tarp off his old DT1, tells me to fire it up and take it for a ride. I didn't come back for almost an hour! The memories!
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Old 04-08-2010, 04:52 PM   #57
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Quote:
Originally Posted by eyedragaknee
Good to see I am not alone.

I'm closer to being finished.

Website below has a bunch of before and progress pics

Keep it going !
Some nice work...
The weather has been bad and it's way too cold in the garage to make much progress.
Hope it warms up soon!
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Old 04-08-2010, 05:28 PM   #58
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Quote:
Originally Posted by Donzzilla
Isn't a '68-'71 DT1 all the same? If it's a different mag cover then it would be a DT2.
I thought they went DT1 DT2 DT3 DT250A,B, etc.
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Old 04-08-2010, 09:27 PM   #59
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The '68 had a 2 screw mag cover among other slight differences.
The main crankcases were changed also at some point. The top main case screw that went right at the base of the cylinder was changed (shorter).
The front fuel tank mount and top rear motor mount were two others.
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Old 04-24-2010, 05:56 PM   #60
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Just about to head back to Idaho.
Great to visit CalEfornia, but I need to go back HOME.
The pipe came out really nice!! Found an Akront rim for the rear, found seat foam and re-production seat cover. Bought some used "Modern" dirttrack tires. Bought my old Ken Maely boots and steel shoe back and getting the itch to go racin!!
Need my cylinder back first so I can build the motor.
More driving for now...

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