Running rich.

Discuss mechanical problems here.

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Johnno
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Posts: 204
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Running rich.

Postby Johnno » Sat Aug 18, 2018 11:28 am

Hi guys,My MM is running rich.Pulled it apart and can see no significant wear(H1 SU).Standard needle,no wear marks.Choke is returning as it should.
Any ideas?
Power to your Pistons,Johnnydoome.

myoldjalopy
Minor Legend
Posts: 1134
Joined: Tue Jan 29, 2013 10:32 pm
MMOC Member: Yes

Re: Running rich.

Postby myoldjalopy » Sat Aug 18, 2018 2:17 pm

On the the assumption that you have tried to adjust the mixture without success and that both the needle and jet are not worn, or the needle bent, or fitted incorrectly, then cleaning the suction chamber and piston carefully (do not use any emery or similar abrasive) may help if the piston is sticking a bit. Maybe the air cleaner is choked?

RobThomas
Minor Legend
Posts: 2548
Joined: Thu May 11, 2006 10:34 am
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Re: Running rich.

Postby RobThomas » Sat Aug 18, 2018 6:46 pm

Is it a 100 thou jet instead of a 90 thou one? BTDT!
Cardiff, UK


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