Question about 1989 Husqvarna CR 430

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Carburetor adjustments 1983 Husqvarna CR 430

Carb setting for mikuni 38 mm for 1983 husqvarna 430 cr @

Posted by Anonymous on

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  • Husqvarna Master
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Hi, Anonymous it should be noted that the "AIR FUEL" mixture screw adjustment "ONLY" manages your idle and has no effect on any other circuit also any intake leaks must be repaired before the A/F adjustment procedure can be performed otherwise you will never obtain a proper idle and you will waste a lot of time chasing the impossible. The A/F mixture screw's purpose is to fine-tune the fuel charge entering the combustion chamber. The following applies to both 2 and 4 stroke engines:
1. The mixture screw may be sealed at the factory with a Welch Plug please review the following video for removal.
https://www.youtube.com/watch?v=wAXcksgvDkM
2. The mixture screw manages a range of 3 complete 360-degree counterclockwise turns from the bottom/closed position.
3. The mixture screw should have a spring and o-ring for tension and sealing integrity.
4. Turn the mixture screw clockwise until it gently bottoms out, this makes the fuel charge very lean and the engine should not idle if it does then the pilot/idle jet is too big and needs to be replaced with the next size smaller.
5. Turn the mixture screw 1 and 1/2 turns counterclockwise to establish a baseline for starting the engine.
6. To fine-tune the idle circuit, adjust the mixture screw 1/4 turn in or out to achieve maximum idle RPM, wait 15 seconds between each adjustment for the idle to settle.
7. Never go past 3 full turns out this will make the fuel charge rich, foul plugs, and produce black smoke out of the exhaust, if the engine RPM keeps increasing past 3 turns the pilot/idle jet is too small and needs to be replaced with the next size larger.
8. After achieving maximum idle back out the mixture screw another 1/8 of a turn then adjust the throttle cable idle stop screw to 950-1050 RPM.
9. This procedure works great on 99% of all engines, for the 1% that demand a more robust throttle response on aftermarket monster fuel delivery systems additional tweaking outside the box may be necessary.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
https://www.google.com/search?q=Carburetor+adjustments+1983+Husqvarna+CR+430&tbm=isch&source=univ&sa=X&ved=2ahUKEwjC09ybpd3lAhVBuVkKHV61C4oQsAR6BAgIEAE&biw=1440&bih=757
https://www.youtube.com/watch?v=nxwZ3sOI0Z0
http://docs.husqvarnaoutlet.com.cdn.wavenetworks.com/repair%20manuals/1987-1988%20-%204%20Stroke%20Engine%20Repair.pdf
https://www.bikebandit.com/husqvarna-motorcycle-parts
http://mybikemanuals.com/husqvarna/

Posted on Nov 09, 2019

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4 Suggested Answers

6ya6ya

6ya staff

  • 2 Answers

SOURCE:

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Posted on Jan 02, 2017

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Z Laws

  • 375 Answers

SOURCE: kick back and starting problens

Take it to a shop and get it tuned - remotely diagnosing problems with a modded bike is impossible.

Posted on Jun 27, 2009

stainless123

  • 5 Answers

SOURCE: husqvarna wr 430 ignition timing motoplat

http://www.yourhusky.com/files/5._Husqvarna_Electrical_&_Ignition_System.pdf

Posted on Jul 13, 2010

SOURCE: I have a 1983 husqvarna 430 wr with a motoplat

Sounds like your ignition module is the problem from what information you've given.

Posted on Sep 23, 2011

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