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mattsmadmini
 Post subject: Annoying carby issue...
PostPosted: Thu Sep 12, 2013 4:50 pm 
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Milatsmadmini
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Joined: Mon Nov 12, 2007 6:57 pm
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Location: the inner west of sydeney!
So i put a HS6 on my motor recently, im having an annoying time with it to be honest, ive tuned it and got a nice rich needle in it etc... but i having trouble with maybe the shaft? let me explain

start engine: idle fine
rev engine: make smiley face
Stop revving engine in an attempt to idle: crappy very high idle, i have to twist the shaft to make him settle

idle screw is fine (when the return/stop gets to it) but it wont automatically go all the way back to that spot...

thoughts?

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drmini in aust
PostPosted: Thu Sep 12, 2013 4:53 pm 
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Sounds like the butterfly plate is not centred.
Take carb off, undo idle stop screw to clear stop, loosen both butterfly screws 1/4 turn.
Hold throttle closed and do the 2 screws back up. Hold up to light, should be none? visible. Stake the screws gently again if needed.
Refit carb, adjust idle stop screw.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
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Bubbacluby
PostPosted: Thu Sep 12, 2013 4:56 pm 
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1275cc
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I know I'm stating the obvious but....

Have you got a strong enough spring on it to pull the butterfly fully closed once you release the throttle?

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mattsmadmini
PostPosted: Thu Sep 12, 2013 4:58 pm 
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Milatsmadmini
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Location: the inner west of sydeney!
yeh forgot to mention that, 2 v. strong springs

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“A turbo: exhaust gasses go into the turbocharger and spin it, witchcraft happens and you go faster.” - Jeremy Clarkson
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IndigoBlueCooperS
PostPosted: Thu Sep 12, 2013 8:42 pm 
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998cc
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Location: Adelaide
Do you have a little bit of free play in the cable. If not it can hold it open a bit.
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1310/71
PostPosted: Sat Sep 14, 2013 6:16 am 
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1275cc
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Location: Plumpton, NSW
Do you have a weber? - swap it for that :lol:

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drmini in aust
PostPosted: Sat Sep 14, 2013 8:31 am 
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1310/71 wrote:
Do you have a weber? - swap it for that :lol:

Bwahaha.. good call KB. It wasn't broke before was it... but ya fixed it by fitting an SU. 8)

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
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