Jetting a 550, help please.

ManxBerg · Feb 20, 2009

I'm hoping some site expertise can save me some time as getting the jetting right seems to be a time consuming job.

I am trying to get the jetting right on my 2005 Fe550e and have currently
38PJ
168MJ
60PAJ
78Starter jet
The needle is a OCDMS and is set on clip 5 (from the pointy end of the needle)

This was trial and error clip, position 3 gave a bog as the throttle was opened
clip 4 better but still some bog around 4th gear.
clip 5 better still very little if any bogging. pulls hard.
The problem with clip position 5 is that it needs a little throttle when starting. Why would this be? I guess the fatter needle is making it too lean to start unless I pull it back a little.

I've also tried to use a 162MJ but couldn't get the bike to start on any clip position and had a lot of kickback through the kickstart. Can someone explain what causes the engine to kickback?

What jetting do any other 550 owners use? and any tips from where I'm at with the bike needing a little throttle to start?
I feel that if I could go to clip 6 the bike would be better still but figure I could do the with a MJ change. What MJ a clip setting would be similar? 165MJ clip 4?

Husa98 · Feb 20, 2009

ManxBerg said:
I'm hoping some site expertise can save me some time as getting the jetting right seems to be a time consuming job.

I am trying to get the jetting right on my 2005 Fe550e and have currently
38PJ
168MJ
60PAJ
78Starter jet
The needle is a OCDMS and is set on clip 5 (from the pointy end of the needle)

This was trial and error clip, position 3 gave a bog as the throttle was opened
clip 4 better but still some bog around 4th gear.
clip 5 better still very little if any bogging. pulls hard.
The problem with clip position 5 is that it needs a little throttle when starting. Why would this be? I guess the fatter needle is making it too lean to start unless I pull it back a little.

I've also tried to use a 162MJ but couldn't get the bike to start on any clip position and had a lot of kickback through the kickstart. Can someone explain what causes the engine to kickback?

What jetting do any other 550 owners use? and any tips from where I'm at with the bike needing a little throttle to start?
I feel that if I could go to clip 6 the bike would be better still but figure I could do the with a MJ change. What MJ a clip setting would be similar? 165MJ clip 4?

I use a 158MJ, OBDMS Clip 3, 38PJ, adjustable PAJ nearly 1/2 turn open.
reduce of the pump squirt of course.
starting without throttle cold and hot.

hope this helps.

DaleEO · Feb 20, 2009

ManxBerg said:
I'm hoping some site expertise can save me some time as getting the jetting right seems to be a time consuming job.

I am trying to get the jetting right on my 2005 Fe550e and have currently
38PJ
168MJ
60PAJ
78Starter jet
The needle is a OCDMS and is set on clip 5 (from the pointy end of the needle)

This was trial and error clip, position 3 gave a bog as the throttle was opened
clip 4 better but still some bog around 4th gear.
clip 5 better still very little if any bogging. pulls hard.
The problem with clip position 5 is that it needs a little throttle when starting. Why would this be? I guess the fatter needle is making it too lean to start unless I pull it back a little.

I've also tried to use a 162MJ but couldn't get the bike to start on any clip position and had a lot of kickback through the kickstart. Can someone explain what causes the engine to kickback?

What jetting do any other 550 owners use? and any tips from where I'm at with the bike needing a little throttle to start?
I feel that if I could go to clip 6 the bike would be better still but figure I could do the with a MJ change. What MJ a clip setting would be similar? 165MJ clip 4?

Hi Manx,

First off, you indicate the needle clip position from the top down, not from the pointy end. IE Your clip position #5 is really clip position #2.

Your pilot jet and paj are right for each other, but what have you got your ps set at? Tell us how you have gone about setting the ps and the idle speed.

Did you install a #60 paj or are you using an adjustable paj?

You should not have to open the throttle to get the bike to start, cold or hot.

Making a main jet size change of 2 steps should not have anything to do with how your bike starts.

And yes getting the jetting right is a time consuming job..........But in the end once you've learned how to do it yourself, you'll be able to solve your own problems quickly.

Answer those questions I've asked and we'll see if we can't get you sorted.

ManxBerg · Feb 20, 2009

RE: Re: Jetting a 550, help please.

Ok Thanks for putting me right on the clip positions. I've not yet managed to get the bike started with the 162MJ which is now in the carb so couldn't do anything about the PS screw and idle.
When it was running with the 168MJ I warmed the bike then turned the screw in till it died then turned half a turn out. It was in the middle of the PS screw range and clip 2 made the engine run nice and strong. I don't know why it took a little throttle to start any idea's? I've never had to do that before.
This bike starts easily with the 168MJ so why no start with a 162MJ I've changed nothing else?
How do you adjust the pump squirt?

DaleEO · Feb 20, 2009

And the paj? What type is it? Adjustable or fixed?

ManxBerg · Feb 20, 2009

The PAJ is fixed was #100 but have a #60 installed

DaleEO · Feb 20, 2009

Re: RE: Re: Jetting a 550, help please.

ManxBerg said:
Ok Thanks for putting me right on the clip positions. I've not yet managed to get the bike started with the 162MJ which is now in the carb so couldn't do anything about the PS screw and idle.
When it was running with the 168MJ I warmed the bike then turned the screw in till it died then turned half a turn out. It was in the middle of the PS screw range and clip 2 made the engine run nice and strong. I don't know why it took a little throttle to start any idea's? I've never had to do that before.
This bike starts easily with the 168MJ so why no start with a 162MJ I've changed nothing else?
How do you adjust the pump squirt?

Okay, let's take this step by step. You seem to be bouncing around quite a lot, so let's get it idling and starting normally first.

I need some more clarification on the ps, you say that it is/was in the middle of the ps range.

What I need to know is: A) How many turns out it is now, B) How many turns out it was when it died.

I need to know this as I have no reference to where the ps is at, and I don't know what your perception of the ps range is.

ManxBerg · Feb 20, 2009

RE: Re: RE: Re: Jetting a 550, help please.

So you want me to take the carb off, put the 168MJ back in, start it up get the idle set and then turn the PS down till it dies then turn it out a little and record where that is. I'll head to my workshop then!

Just to be clear, apart from the starting which required a little throttle but was easy, the bike on that setting was running as good as ever and I felt I was really close. If it wasn't for the starting I would have left it there.

DaleEO · Feb 20, 2009

Re: RE: Re: RE: Re: Jetting a 550, help please.

ManxBerg said:
So you want me to take the carb off, put the 168MJ back in, start it up get the idle set and then turn the PS down till it dies then turn it out a little and record where that is. I'll head to my workshop then!

Just to be clear, apart from the starting which required a little throttle but was easy, the bike on that setting was running as good as ever and I felt I was really close. If it wasn't for the starting I would have left it there.

Well, since you can't get the bike started with the 162mj in it, and you said a couple of posts back that the 162 is in it, then I would assume that putting the 168mj back in it so that it runs would be logical.

Further, you shouldn't have to pull the carb to change jets, any of them. Just pull the electric starter off, lay it on the right side foot peg, unscrew the float bowl drain, and the main is right there.

How about you do this first, go out to the shed and turn the ps in, until it's lightly seated, counting how many turns in you had to go and then tell me that.

You could also join me in the chat room and we could make this a bit quicker that way.

ManxBerg · Feb 20, 2009

RE: Re: RE: Re: RE: Re: Jetting a 550, help please.

Thanks for the help. I will have to walk the dogs and have some food as it's getting late here in the UK but I will report back when that is complete. Thanks for the tip on removing the electric starter. I've been taking the carb off which is more fiddly.

DaleEO · Feb 20, 2009

Okay, yeah it's probably about 8pm there now. Let me know what you find.

Dale

Taffy · Feb 20, 2009

Re: RE: Re: RE: Re: Jetting a 550, help please.

DaleEO said:
Further, you shouldn't have to pull the carb to change jets, any of them. Just pull the electric starter off.

he's had the "beefy" treatment. not an option anymore....

regards

taffy

ManxBerg · Feb 20, 2009

RE: Re: RE: Re: RE: Re: Jetting a 550, help please.

Ok dogs walked and food can wait, sorry for the jump here but I've taken some Taffy advice and gone back to the 85 starter jet and put in a 158MJ and set the needle on clip 3.
Carb is back on and bike starts fine!
Bit dark now for trial runs but for tommorrow whats the technique for the PS?
I understand Taffy's point that I need to check top end to see if the jet is right then move the needle clip for mid and then set PS for low down.

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Jetting a 550, help please.

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