× 1-800-946-2642 Home My Account Social / Forum Articles Contact My Cart
Shop Now
Select Your Car Type Sale Items Clearance Items New Items
   Forum Width:     Forum Type: 

 Posted: Jun 1, 2017 03:19PM
Total posts: 1716
Last post: Oct 18, 2020
Member since:Oct 18, 2011
Cars in Garage: 0
Photos: 0
WorkBench Posts: 0
Its been quite a while since I've had mine apart but memory suggests that the bottom of the piston has a hole.  Fixed needles fit into a brass carrier that fits in this hole.  When you change fixed needles this carrier just stays in the piston .  

To change over you remove the brass insert and insert the matching plastic carrier that holds the swinging needles.

My small selection of needle for my HS4s is about half and half; fixed and swinging.

Cheers, Ian  

 Posted: May 31, 2017 07:19AM
Total posts: 1677
Last post: Aug 26, 2021
Member since:Apr 21, 2004
Cars in Garage: 0
Photos: 0
WorkBench Posts: 0
Quote:
Originally Posted by 1963SV2

You must not understand that fixed and swinging needles are directly interchangeable ..just use the correct mount...

Cheers, Ian
I did not know that. the needles look different because one has a "hat" does that come off? so I can change or does the little black cylinder change to use the "hatless" fixed needles.


Once you replace everything that is attached to something else. It will all be fixed.

 Posted: May 24, 2017 05:48AM
Total posts: 13978
Last post: Jan 15, 2024
Member since:Jan 22, 2003
Cars in Garage: 4
Photos: 381
WorkBench Posts: 1
CA

I am using #5 needles in my twin HS4 carbs.  It's a near stock 1275 with ultra light flywheel and LCB.  The carbs work fantastically and definitely had a slight increase in performance over the twin 1.25 I had on there.

As I recall, I have the jet only slightly below the bridge, so lots of room for richening if I were to mod the engine

 

"Everybody should own a MINI at some point, or you are incomplete as a human being" - James May

"WET COOPER", Partsguy1 (Terry Snell of Penticton BC ) - Could you send the money for the unpaid parts and court fees.
Ordered so by a Judge

 

 

 

 Posted: May 23, 2017 11:10PM
Total posts: 1716
Last post: Oct 18, 2020
Member since:Oct 18, 2011
Cars in Garage: 0
Photos: 0
WorkBench Posts: 0
".....I want a blue spring and a BG needle. ok but a BG is a fixed needle and the twins I have are swinging needles. what has a similar profile?.."

You must not understand that fixed and swinging needles are directly interchangeable ..just use the correct mount...

Cheers, Ian

 Posted: May 23, 2017 08:29PM
Total posts: 1188
Last post: Aug 13, 2020
Member since:Aug 9, 2016
Cars in Garage: 0
Photos: 0
WorkBench Posts: 0
yeah, i agree, when it comes to SU carb issues, Joe curto is the man,,, he is the mesiah when it comes to SU's. But there's one guy here who is equally good in dealing with SU carb but he is of no help because he lives in Coppenhagen......,aaanyway! I have the 998 and im using AAC needle, runs smooth,that was the original needle that came with the car. then i tried to use AAB but it started to run crappy. so i go back to AAC.

 Posted: May 23, 2017 05:56PM
Total posts: 3919
Last post: Oct 29, 2019
Member since:Oct 4, 2013
Cars in Garage: 0
Photos: 0
WorkBench Posts: 0
weirdEh..  ask the expert. Joe Curto.. later bc

 Posted: May 23, 2017 05:50PM
Total posts: 1677
Last post: Aug 26, 2021
Member since:Apr 21, 2004
Cars in Garage: 0
Photos: 0
WorkBench Posts: 0
OK so I have finally gotten the twins rebuilt and in the car. 
so right now the engine is a 998 of unknown lineage. I think the needles are either ADD or AAE (will check tomorrow) they have a bit of "discolouration" on them not really rusty but might be so I want to replace them and in a 2 weeks the 1275 will be back from the builders anyway.

so onto the question. according to vizard's book a 1275 with modified head, race cam and extractor exhaust running 2 - 1.5 SU's I want a blue spring and a BG needle. ok but a BG is a fixed needle and the twins I have are swinging needles. what has a similar profile?
and really according to the minty SU needle chart the BG is massively richer then the needles I have now. so what do I want? car is used for auto slalom and regular road use.


Once you replace everything that is attached to something else. It will all be fixed.