Hey all,
It’s been years since my last post, but I am reviewing all posts regularly.
Recently I went through my carbs for some cleaning and other stuff. The bike is a 1993 1400, Vance and Hines pipes, K&N drop in filters, other than that the engine i stock. The bike runs pretty good, but just not as good as before.
Now I have a suspicion if I didn’t swap the front and rear jet needles, by accident. Does anyone have experience in that aspect? What would happen, are there tell tale symptoms? What are the size difference of the needles?
I thought I check here before I open them back up.
Thanks in advance.
Lee
Carb jet needles/ front vs rear
-
- Studying MC Handbook
- Posts: 58
- Joined: Tue Mar 15, 2016 7:58 pm
- My Bike: 1993 1400 Intruder
- sgtcall
- LICENSE SUSPENDED!
- Posts: 2809
- Joined: Sun Apr 03, 2016 5:59 pm
- My Bike: Triumph Bonneville Speedmaster
- Location: Stranded in New Jersey
Re: Carb jet needles/ front vs rear
Welcome back!
I don't have a answer for you but just in case here are a couple of things to check out.
INTRUDER MANUALS AND INFORMATION
viewtopic.php?f=19&t=14168
POSTING PICTURES ON INTRUDERS ALERT
viewtopic.php?f=19&t=13992
If you have any type of electrical issue, have your battery load tested before you do anything else. Any auto parts store will test it for free.
- Herb
- Joined a 1200cc Club
- Posts: 19371
- Joined: Sun Oct 26, 2014 9:28 pm
- My Bike: 1999 1400 intruder
Re: Carb jet needles/ front vs rear
https://www.motosport.com/oem-parts/suz ... 28front%29
according to the parts fiche above, they are not the same part number. How much difference in performance it might make is anyone's guess.
according to the parts fiche above, they are not the same part number. How much difference in performance it might make is anyone's guess.
I can't seem to win the lottery. I think I have used up all of my good luck riding motorcycles.
-
- Studying MC Handbook
- Posts: 58
- Joined: Tue Mar 15, 2016 7:58 pm
- My Bike: 1993 1400 Intruder
Re: Carb jet needles/ front vs rear
Thanks @sgtcall and @Herb for your input.
UPDATE: I just can’t stand having open questions, so I opened th carbs back up. Turns out there is a difference. It is so subtle, but for a carb probably huge.
Also, turns out I have a setup for the US model 1996 and later. Also jet sizes are for that setup. The bike is a 1993, and I’ve owned it since 2001. So the carbs have been rebuilt or replaced between 1992 and 2001, with parts for a later model. Now I will research if the carb bodies have changed after the 1996 changeover.
So, measurements and markings for the
front needle:
Marking 5D51
Overall length 52.52mm
E clip length 49.41mm
Rear needle
Marking 5D35
Overall length 52.38mm
E clip length 49.13mm
Diameter at tip 2.15mm same on both
Diameter at head 2.54mm same on both
So there is a difference, now I should find out if the 1995 and earlier model are how much difference.
More to follow. And thanks for all the input.
Lee
UPDATE: I just can’t stand having open questions, so I opened th carbs back up. Turns out there is a difference. It is so subtle, but for a carb probably huge.
Also, turns out I have a setup for the US model 1996 and later. Also jet sizes are for that setup. The bike is a 1993, and I’ve owned it since 2001. So the carbs have been rebuilt or replaced between 1992 and 2001, with parts for a later model. Now I will research if the carb bodies have changed after the 1996 changeover.
So, measurements and markings for the
front needle:
Marking 5D51
Overall length 52.52mm
E clip length 49.41mm
Rear needle
Marking 5D35
Overall length 52.38mm
E clip length 49.13mm
Diameter at tip 2.15mm same on both
Diameter at head 2.54mm same on both
So there is a difference, now I should find out if the 1995 and earlier model are how much difference.
More to follow. And thanks for all the input.
Lee
- hillsy v2
- Bike out of hock
- Posts: 3144
- Joined: Wed Jul 27, 2022 5:35 pm
- My Bike: Too many to list
Re: Carb jet needles/ front vs rear
While you are in there - check out the needle seats as well for signs of wear. The front carb on the VS lays relatively flat and the needle has more of a tendency the cut into the seat compared to the rear carb setup.
- Herb
- Joined a 1200cc Club
- Posts: 19371
- Joined: Sun Oct 26, 2014 9:28 pm
- My Bike: 1999 1400 intruder
Re: Carb jet needles/ front vs rear
Yeah, there is a difference and you have them swapped. Since the rear does run richer than the front it could be causing a rich issue.Thunderbirds1 wrote: ↑Tue Sep 19, 2023 5:37 pmThanks @sgtcall and @Herb for your input.
UPDATE: I just can’t stand having open questions, so I opened th carbs back up. Turns out there is a difference. It is so subtle, but for a carb probably huge.
Also, turns out I have a setup for the US model 1996 and later. Also jet sizes are for that setup. The bike is a 1993, and I’ve owned it since 2001. So the carbs have been rebuilt or replaced between 1992 and 2001, with parts for a later model. Now I will research if the carb bodies have changed after the 1996 changeover.
So, measurements and markings for the
front needle:
Marking 5D51
Overall length 52.52mm
E clip length 49.41mm
Rear needle
Marking 5D35
Overall length 52.38mm
E clip length 49.13mm
Diameter at tip 2.15mm same on both
Diameter at head 2.54mm same on both
So there is a difference, now I should find out if the 1995 and earlier model are how much difference.
More to follow. And thanks for all the input.
Lee
The following link takes you to the site where you can select the year and model. Then you can hunt up the part you want to find out about.
The OEM parts Fiche is a wealth of information.
https://www.motosport.com/oem-parts
I can't seem to win the lottery. I think I have used up all of my good luck riding motorcycles.