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August 23, 2017, 01:16:04 AM
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 1   oldski-doosleds Message Board / Vintage ski-doo General Disscusion / Re:7040 ... so it begins ...  on: August 22, 2017, 08:13:31 PM 
Started by GaWajn | Last post by Joe Olympique
I'm not seeing any photos  >:(  Just getting the photobucket ransom images
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 2   oldski-doosleds Message Board / Help Desk (Only) / Re:72 Nordic 640 Questions  on: August 22, 2017, 08:10:55 PM 
Started by Doo640ER | Last post by Joe Olympique
Cylinder alignment is important. Just a little bit off and your intake manifold or your muffler will not line up with their mounting studs (done that).  Easy enough to make one before you disassemble the engine.  Piece of one inch flat stock about 7 inches long...remove carb and intake to expose mounting studs.  A little dab of paint on the end of each stud, lightly touch the flat stock to the studs, paint will transfer on to the flat stock, wipe studs clean, let the paint dry and then drill.

Even easier...when you're reassembling the engine position the intake and the muffler in place before you torque down the head nuts.  No aligning tool required for that approach.
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 3   oldski-doosleds Message Board / Help Desk (Only) / Re:72 Nordic 640 Questions  on: August 22, 2017, 07:03:11 PM 
Started by Doo640ER | Last post by Doo640ER
Thanks Eric and Joe Oly for your insight and experience.  I've got plenty of time so I'll take it slow and try to Doo it right.  Hard to believe with my passion for old Ski Doos and at my age I've never completely rebuilt a Rotax yet. 

I'll Doo a leakdown test and see where that leads me.  I'm trying to figure out how to doo this effectively without a good spark plug hole since i cant install the PTO plug?  Maybe put a good rubber stopper in there, I have plenty at the Lab at work.  It only needs to hold about 5 psi, right?

Regardless I'm going to change out the condensers.  I picked up some of the correct NOS Bosch ones a short time ago so no sense keeping them in my parts stash.  The points seemed OK since it always ran fine until the engine got pretty warm.  I have a set of NOS points too in case I need them.

So,..... let's just say I need to doo a complete teardown and reseal.  I will have the cylinders honed and get some new rings of course.  During the cylinder install, how important is it to use the cylinder alignment tool?  I saw this listed in the parts manual but have no idea just how important it is to use it? 

Lastly, I see a lot of complete gasket sets for the 70 and 71 640 Rotax, but very few listed for the 72 640.  Are they actually different from 70/71 to 72?  The parts manuals show different numbers but I have seen some sellers selling the same kits for all three years.  Crank size different diameters?  Are the Winderosa full seal kits OK to use?  I haven't found many alternatives. 

Yikes, long post!  Thanks for any input.
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 4   oldski-doosleds Message Board / Vintage ski-doo General Disscusion / Re:7040 ... so it begins ...  on: August 22, 2017, 06:22:45 PM 
Started by GaWajn | Last post by Banoe
X2 Elan Dude.  Had a Elan hood and windshield fly off at 60 mph when I put it in the back of the pickup backwards. That brittle old plastic hood didn't like asphalt very much.
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 5   oldski-doosleds Message Board / Vintage ski-doo Parts/Items For Sale/Wanted (Only) / Wanted 69 320 shroud  on: August 22, 2017, 05:58:37 PM 
Started by olympic | Last post by olympic
I am looking for the outer shroud with the correct engine tag on it for a rotax 320. I have the inner one but it has cracks all over it and somebody has cheaply welded the other ones so I would take the inner one if you have it. Mine is electric start just to let you know. Thanks
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 6   oldski-doosleds Message Board / Vintage ski-doo General Disscusion / Re:7040 ... so it begins ...  on: August 22, 2017, 10:52:26 AM 
Started by GaWajn | Last post by Elan Dude

Quote from: GaWajn on August 20, 2017, 06:40:43 PM   

Got a hitch made for the old car. Now I can haul the sled to the car shows 

Works pretty good at speeds below 70Km/Hr. I need to get a tight fitting cover for the sled to be able to do highway speeds.


Looking good GaWajn. Great combo. Be careful with the windshield if you go over 60. The tend to flip over without warning.
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 7   oldski-doosleds Message Board / Vintage ski-doos For Sale/Wanted (Only) / Ski-doos for sale  on: August 21, 2017, 03:27:06 PM 
Started by skidoofarmer | Last post by skidoofarmer
65 Oly restored very nice $2795 1967 oly restored nice $1995 1968 oly clean kept indoors $495 1968 tnt 600 restored $24995 1970 Blizzard 292 all the rite parts restored $7995 1974 nordic 640 clean runs good $995
1985 formula mx clean $995 1990 plus 500 runner $1995
I can email pictures
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 8   oldski-doosleds Message Board / Vintage ski-doo General Disscusion / Re:7040 ... so it begins ...  on: August 21, 2017, 06:26:48 AM 
Started by GaWajn | Last post by snorander
Fantastic! Great job!!!!!!
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 9   oldski-doosleds Message Board / Vintage ski-doo General Disscusion / Re:7040 ... so it begins ...  on: August 20, 2017, 07:04:06 PM 
Started by GaWajn | Last post by OlyGab
Wowww! Tout un combo!! Real show winner!
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 10   oldski-doosleds Message Board / Vintage ski-doo General Disscusion / Re:7040 ... so it begins ...  on: August 20, 2017, 06:56:10 PM 
Started by GaWajn | Last post by VSDPS
Very kewl!!
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