Author Topic: 90M carb  (Read 1745 times)

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Offline ian67

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90M carb
« on: May 24, 2015, 05:17:12 AM »
Next question,

how many throttle close springs should be inside the carb?

My carb had 2 throttle closing springs in it, the smaller spring was inside the larger one and around the throttle cable.
I've looked in the manuals and I can only see one spring shown. I suspect the extra one was put in to try to overcome the dried out and sticky grease in the hand-grip throttle mechanism.
Now that I've cleaned and lubed everything I reckon just the big spring will do the job.

Offline RayK

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Re: 90M carb
« Reply #1 on: May 24, 2015, 05:36:17 AM »
Ian
The 90 Mtn carb is a 15mm Mikuni. See parts manual on this site for a diagram. Page 6. There should only be 4 springs:
1. Largest on throttle slide
2. Next smaller spring on starter plunger (choke)
3. Small one on top (idle adjust)
4. Smallest on pilot screw.

If you need to discuss please phone me on 02 64522464 or mobile 0437 401 600.

Cheers
Ray

« Last Edit: May 24, 2015, 05:43:18 AM by RayK »
BS 175DT, BS 50 Sport x 2, BS 90 Mountain x 3, BS 90 Deluxe, BS 90 Sport x2, Chibi, BS 60 Sport, BS 90 Trail, BS100 Sport.

Offline ian67

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Re: 90M carb
« Reply #2 on: May 24, 2015, 06:39:36 AM »
Thanks Ray.
Now i just need to get a new item 3-27 "packing needle seat" and the carb will be right to go.

Ian.


 


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