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  Starter ring gear thread pitch?
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   Author  Topic: Starter ring gear thread pitch?  (Read 112 times)
Doonut
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Starter ring gear thread pitch?
« on: March 10, 2018, 11:32:12 AM »
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Does anybody know the thread pitch on the starter ring gear for the 399 and 640 twins? Is it M35x 1.5, or is it M36 x 1.5? Hard to tell with calipers. Thanks!

« Last Edit: March 11, 2018, 05:23:18 AM by Doonut » Report to moderator Logged

1967 Alouette 707 - 1967 Super Olympique 299
1967 Alpine 299 - 1968 Super Olympique E 299
1969 Nordic 371 E - 1970 Olympique 335-1970 Alpine 399R
1971 Boa Ski Mark 1 - 1972 TNT 340
1972 Olympique 399 - 1972 Nordic 440
-1974 Olympique 399
1978 Elan 250 Dlx - 1982 Alpine 640
1970 SkiBee Scout
Doo640ER
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Re:Starter ring gear thread pitch?
« Reply #1 on: March 10, 2018, 04:01:59 PM »
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Hey Doonut,...I don't know the answer, but sure am curious to know if someone else does.  Are you looking to build your own ring gear puller?  When I rebuilt my Nordic 640 motor a few months ago, i was looking for the same info.  I wound up modifying one of my gear pullers to get it off the crank.  It worked, but was not the optimal solution.  I hope someone else chimes in on this.
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67 Olympique 250
70 TNT 292 (slides)
70 Olympique 12/3
70 Ski Boose MK I
72 Nordic 640ER (2)
Chrystler Sno Runner (2)
81 Citation 4500e
02 Legend GS 600
2011 GSX LE 600 E-tec
Doonut
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Re:Starter ring gear thread pitch?
« Reply #2 on: March 10, 2018, 04:47:43 PM »
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Ya, thats kinda what I had in mind. Going to build my own puller, find a metric nut and with some resources handy, not to mention a buddy who can probably make one up on a lathe.  I am pretty sure it is a M36 tho. Maybe somebody here has made one up or has measured one,,,,,,
« Last Edit: March 10, 2018, 07:49:45 PM by Doonut » Report to moderator Logged

1967 Alouette 707 - 1967 Super Olympique 299
1967 Alpine 299 - 1968 Super Olympique E 299
1969 Nordic 371 E - 1970 Olympique 335-1970 Alpine 399R
1971 Boa Ski Mark 1 - 1972 TNT 340
1972 Olympique 399 - 1972 Nordic 440
-1974 Olympique 399
1978 Elan 250 Dlx - 1982 Alpine 640
1970 SkiBee Scout
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