[Healeys] HD6 jet adjustment

[warthodson at aol.com]

 The fall rate test is for the piston fit in the chamber not the centering of the jet(s) on HD6's.The air cleaners need to be removed, not easy on a tri-carb setup, to gain access to the jet centering fittings. It is difficult for me to think all 3 needles are not centered.If all three carbs have failed the piston fall rate test, my first thought is that the pistons have become mis-matched with their mating bell housings.  Gary Hodson
    On Tuesday, August 6, 2024 at 02:51:47 PM CDT, JSARCH via Healeys <healeys at autox.team.net> wrote:   

 
I would say most likely based on the attached instructions the SU Service Manual. There is a specification for the fall rate of the piston, at least for the HS4 carbs. You might find it on the SU Berlin website. https://sucarb.co.uk/technical/category/hd-type-carburetters

  

John

  

From: Healeys <healeys-bounces at autox.team.net> On Behalf Of Simon Lachlan via Healeys
Sent: Monday, August 5, 2024 7:09 AM
To: Healeys <healeys at autox.team.net>
Subject: [Healeys] HD6 jet adjustment

  

I’m told that the jets on my HD6s are not quite correctly centred. The pistons do not fall fast enough nor with a satisfactory “click”. I have three of them in my MkII BT7. Do I have to take the carbs out or can it be done in situ? Not a lot of room……..

Simon
_______________________________________________
Support Team.Net http://www.team.net/donate.html
Suggested annual donation  $12.75

Archive: http://www.team.net/pipermail/healeys http://autox.team.net/archive/healeys

Healeys at autox.team.net
http://autox.team.net/mailman/listinfo/healeys

Unsubscribe/Manage: http://autox.team.net/mailman/options/healeys/warthodson@aol.com

  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/healeys/attachments/20240807/523eac09/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: HD jet centering.pdf
Type: application/pdf
Size: 32774 bytes
Desc: not available
URL: <http://autox.team.net/pipermail/healeys/attachments/20240807/523eac09/attachment.pdf>