This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.

Black plug?

Tophat

Tophat

Joined Aug 2006
17 Posts | 0+
Lancashire England
Hi all

First post so go easy please

I have a 2002 550 (not sure of the exact model but it dont have estart)

I have just spent over 600 english pounds on a rebuild but I have a small problem with the fueling. The plug goes black in a short time.

I have cleaned the carb and tank out fully but still the same :(

The Dellorto (spelling??) jetting is

MJ 190
IJ 33
Needle clip 3rd up
Mixture screw 1 1/2 turns out

I have a good spark on a new plug too.

Can anyone suggest anything to remedy this? other than getting an FCR41

Ta
 
Tophat said:
Hi all

First post so go easy please

I have a 2002 550 (not sure of the exact model but it dont have estart)

I have just spent over 600 english pounds on a rebuild but I have a small problem with the fueling. The plug goes black in a short time.

I have cleaned the carb and tank out fully but still the same :(

The Dellorto (spelling??) jetting is

MJ 190
IJ 33
Needle clip 3rd up
Mixture screw 1 1/2 turns out

I have a good spark on a new plug too.

Can anyone suggest anything to remedy this? other than getting an FCR41

Ta
Click to expand...
A black plug can be caused by letting the bike idle to long at warmup or one of the carb settings (or more) is set on the rich side. Another thing that can cause it is the way how you ride. Luging or puttering around will do it as well. Does the bike start very easy or is it hard? Check the Doc. When was the last time the carb was cleaned out, might have missed something? There are some tiny holes that if plugged will cause hard starting.I hope this gives some ideas.
 
You can check the needle and needle jet for wear as well. They are prone to wear that leads to a rich condition.
 
[quote="wildbill]
A black plug can be caused by letting the bike idle to long at warmup or one of the carb settings (or more) is set on the rich side. Another thing that can cause it is the way how you ride. Luging or puttering around will do it as well. Does the bike start very easy or is it hard? Check the Doc. When was the last time the carb was cleaned out, might have missed something? There are some tiny holes that if plugged will cause hard starting.I hope this gives some ideas.[/quote]

Cheers

It takes 4 to 5 kicks to start from cold and one from warm, thats with a clean plug though.

I'm going to strip the carb tonight to see if I can find the problem.
 
a black plug can be caused at any revs. so you still aren't really sure what's rich and when?

if your bike starts warm first time - then thats better than 90% of owners.

i did a thread called choke a few months ago so put 'choke' in a search and you may find it very helpful!

my concern is that you may have a plug cap going or HT lead. all are cheap and easy to try. your cam timing might be slightly out but you should leave it till last.

plug cap, HT lead. connections cleaned and checked. then check the atomizer for ovalness and wear and also the needle for wear.

ultimately it could be the beginning of a stator breaking down. i suggest you drill a hole in the base of the ignition area. check out the doc for a heap of quality work you should do to the stator and it's wiring loom.

regards

Taffy
 
Taffy said:
a black plug can be caused at any revs. so you still aren't really sure what's rich and when?

if your bike starts warm first time - then thats better than 90% of owners.

i did a thread called choke a few months ago so put 'choke' in a search and you may find it very helpful!

my concern is that you may have a plug cap going or HT lead. all are cheap and easy to try. your cam timing might be slightly out but you should leave it till last.

plug cap, HT lead. connections cleaned and checked. then check the atomizer for ovalness and wear and also the needle for wear.

ultimately it could be the beginning of a stator breaking down. i suggest you drill a hole in the base of the ignition area. check out the doc for a heap of quality work you should do to the stator and it's wiring loom.

regards

Taffy
Click to expand...


Cheers Taffy

Im not sure where you mean by "drill a hole in the base of the ignition area" nor the benefit? I cant find the information on the work I should be doing to the Stator? I know it needs to be free of water and looked after for the sake of my pocket though.

The thing here is if I clean the plug it runs and starts great for a while, but on inspection of the plug after a short ride its black as ever.

Im now banging my head against the wall. Ive done more spannering than riding :?

Help!!!!
 
you simply can't expect a plug to be capable of being sooted up and running fine. unless you get a plug for an atco mower that is!

in the doc we have a piece on 'fettling' and also it may be under electrics but you should drill the crankcase behind the flywheel, put the wires in a new tube, mastik/silicone evverything, put a shepherd's crook in the loom under the tank.

but it's all there in the doc. we put it there to save us repeating ourselves - trouble is i can never finbd the phuqing thing :lol: :lol:

regards

taffy
 
they're crap IMHO. i put one in and it lasted about 2-hours. ok, i run corrected jetting compared to the standard (which is rich for 90% of you out there) and so a cleaner porcelian but really!!!! 3 seasons out of an IXU24 and then 2-hours from a DCPR8E. that's rubbish!!!

look how many of you are always having to try a new plug just to get them running!

i m,ay even start a new thread just to try and highlight this problem....

regards

Taffy
 
Taffy said:
they're crap IMHO. i put one in and it lasted about 2-hours. ok, i run corrected jetting compared to the standard (which is rich for 90% of you out there) and so a cleaner porcelian but really!!!! 3 seasons out of an IXU24 and then 2-hours from a DCPR8E. that's rubbish!!!

look how many of you are always having to try a new plug just to get them running!

i m,ay even start a new thread just to try and highlight this problem....

regards

Taffy
Click to expand...

SO is that a Iridium Power IK24 ??? No more numbers or letters??

Ta
 
NO!

it's a nippondenso IXU24. that is the code and the plug you require. i won't use anything else now. it's the direct QUALITY replacement for the 'cooking' plug - whatever code that is.

i don't get hung up on these numbers and things. i haven't used a traditional 'broadnosed plug' since i was 8 YO in 1906.

honest!!!!

regards

Taffy
 
Taffy said:
NO!

it's a nippondenso IXU24. that is the code and the plug you require. i won't use anything else now. it's the direct QUALITY replacement for the 'cooking' plug - whatever code that is.

i don't get hung up on these numbers and things. i haven't used a traditional 'broadnosed plug' since i was 8 YO in 1906.

honest!!!!

regards

Taffy
Click to expand...

Where do you get yours from Taffy??

Google only comes up with one site :?
 
this is one to get from a big shop. KTM dealers i should think. off road only. if it's the site i'm thinking of you need to buy 4 at a time.

what model have you got? i can't speak for early huseys? but anyhting '00 and on for example.

regards

Taffy
 
Taffy said:
this is one to get from a big shop. KTM dealers i should think. off road only. if it's the site i'm thinking of you need to buy 4 at a time.

what model have you got? i can't speak for early huseys? but anyhting '00 and on for example.

regards

Taffy
Click to expand...

Its a 550/6

Much appreciated
Ta

John
 
Will do Taffy but will a nippondenso IXU24 be good for a 550?

I think a trip to a Dyno is needed too.

Cheers

John
 
:?:

now let's fink about it a bit? i offer a direct replacement for another plug and not which bikes which? so if your bike should have a DCPR8E then yep that's what i'm suggesting.

some plug sites do a crpss reference chart and others you can 'contact' for a list etc.

regards

Taffy
 
Ok had the bike on the Dyno and the jetting was way out. Its gone from a 200 MJ down to a 175 to get the fueling right.

But the inevitable is the Dellorto is no good. The slider has some play and is causing stuttering at low speeds.

Looks like I need an FCR41 now. Which is not what I want to hear right now. This bike has cot me a fortune.
:shock:
 
who has run this dyno?

unless you have the right atomizer you'll find that the MJ causes problems elsewhere.

try looking at the jetting suggestions in the tuning part of the doc. they ARE relevant to your bike so try them. you should have a DR270 or DR272 in there. i didn't as you'll see. but then when i tried the carb the other settings weren't available for me to try!

regards

Taffy
 

Similar threads

G
CARBURETION ADJUSTMENT PROBLEMS FE 450 2005
Replies
0
Views
46
GMC77
G
Z
03' fe400 ignition will not rev past 4,500 rpm
Replies
6
Views
1K
zgrant231
Z
J
Dyno Chart for '99 FE501 with FCR41
Replies
22
Views
3K
Taffy
Taffy
Taffy
New - improved carb needle 2004-2008
Replies
3
Views
2K
FlyingZebra
FlyingZebra
Taffy
Dell orto - just about everything was wrong....or was it the needle all along?
Replies
32
Views
8K
Mazzokie
M

Register CTA

Register on Husaberg Forum! This sidebar will go away, and you will see fewer ads.

Recent Discussions

Recent Discussions