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Makotosun

1972 Husqvarna WR450 shifter timing specifications??

  • XRArin
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Hi everyone!

I just acquired this 1972 Husqvarna WR450 a few weeks ago and need to know what timing specifications this bike needs in order for it to run properly. The timing in the shifter is all messed up so it needs to be adjusted or fixed. I am having a professional mechanic fix this bike for me "the right way" and cannot find any info when it comes to timing in the shifter. I don't have the original manual....If anyone can give me specific timing info for this bike, PLEASE LET ME KNOW ASAP. The bike is all coming together!

**This bike is not for sale and need responses with helpful information to help get this bike back into the dirt.** For some reason, the site wont let me post a picture of the bike.

Arin
06 Jun 2023 18:55 #1

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Arin,

If your "professional mechanic" doesn't know how the Husky trans is assembled, you probably have the wrong mechanic. All of the MK (5 speed) and ML (6 speed) transmissions need to be assembled with the shift drum in a certain gear.... 3rd for the 5 speed and 4th for the six speed. This is not some "oddball 450 WR thing"... but pretty much every model through the 1970's and into the 1980's.

There are some things you need to know when assembling those engines... like the gear box or even the kick starter. (If you don't assemble the kick starter correctly, you can literally grenade the cases... I've seen it happen. Not pretty.)

Assembling in the right gear and knowing where to have the gear linkage is really the only "timing" adjustment and the cases need to be split to do it. Very common that someone who doesn't know how to do it gets it wrong. Manuals should be online or Husky Dave probably has one. The ones I have are way too big to email.

I would strongly suggest finding an early Husqvarna specialist... there used to be a couple in Orange County or run down to San Marcos and see John LeFevre at Vintage Husky. He knows what he's doing and probably has more parts in stock for those old bikes than anyone in the world.
1963 YG1-T, 1965 MG1-T, Allstate 250, 1970 CT1b, 1971 R5, 1973 AT3MX, 1974 TS400L, 1975 RD350, 1976 DT175C, 1976 Husqvarna 250CR, 1981 DT175G, 1988 DT50, 1990 "Super" DT50, 1991 RT180, 2017 XT250
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06 Jun 2023 20:55 #2

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P.S. You can install a six speed in a 5 speed case... it was a fairly common swap. So you need to know which trans you have which isn't hard to figure out once inside.
1963 YG1-T, 1965 MG1-T, Allstate 250, 1970 CT1b, 1971 R5, 1973 AT3MX, 1974 TS400L, 1975 RD350, 1976 DT175C, 1976 Husqvarna 250CR, 1981 DT175G, 1988 DT50, 1990 "Super" DT50, 1991 RT180, 2017 XT250
06 Jun 2023 20:58 #3

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MarkT,

Husky Dave is someone I can ask tomorrow. I tried to call him earlier but no answer. I'm praying he has a manual for that kind of bike. He did sell that exact same model I have not too long ago. I know john knows more about these than anyone else. He will be the next mechanic to go to once the Husky needs another big service. The one I have is experienced but not as experienced as John from vintage husky of San Marcos. Its too late to bring it to him (since it's in pieces now) but hope my mechanic gets it right before firing the bike up...


Arin
06 Jun 2023 21:14 #4

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Curiosity killed the cat--but i'm curious to know what it was doing--missing gears while changing--jumping out under power.
Do you think its been apart before & this has caused its changing problems.
Last one i was inside was 1976 so i'm no use. We sold them new from late "60's untill about "80 something when they grew very long legs, & automatic--that was fun--fun i'd rather not have. Forgot i was into those clutches.
Last edit: 06 Jun 2023 22:57 by RT325.
06 Jun 2023 22:55 #5

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