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07 FS550E Jetting questions

2

2_slide

Joined Mar 2008
7 Posts | 0+
Canada 07 FS550E
I have a 07 FS550E and am just trying to dial in my jetting. I think I'm close but not sure if my pilot jet is too small and my main might be a bit big? A little help would be much appreciated.
Here is where I'm at
Elevation 4000-5000 ft
FCR-41
Needle OBDVR 4 clip from top
MJ 182
PJ 40
PAJ 100
MAJ 200
Mixture screw 2 turns out

I have the AP squirt down to about 1 sec. and the bike feels snappy but pops a little on decel. Bike is brand new just a couple of hours on it. Where should I go from here. I don't want to be to lean and I'm not sure as this is my first time jetting a four stroke.

Cheers
Mike

P.S. After riding this thing I know why all you guys are Berg addicts. I'm so excited about this thing I sound like a sales person when a talk about it.
 
Increasing the pilot jet should take care of the decel popping. Taffy should be along soon to tell you your main jet is too big :lol:
 
And Taffy is right!

Help your Engine and save the planet - decrease your mj-size, get the needle of your choice and have fun...
read yourself through the Owner´s Doc - all the info is there


PS: How did you modify your AP and what´s the main-usage of your bike?
 
Thanks guys... What main would you suggest? Couldn't I just drop the needle a clip or two to combat the rich main? I ride on the street just having fun big wheelies and the occasional track day. As far as the AP goes I just turned the adjustment screw by the throttle cables until the squirt was about 1 sec. I'm also thinking of doing the o-ring mod, any thoughts on that?
 
We found the main to be too rich on an 08 450, even in our 'arctic' conditions. It was a 182 and went to a 178 and greatly helped the bike through the entire range.
 
i would have thought that at 5,000ft you can run a 160 with no worries. try a 165 first and then drop it again.

fryguy could give knighter 'a run for his money' but his bike has always lacked an edge!!

regards

Taffy
 
2_slide said:
Thanks guys... What main would you suggest? Couldn't I just drop the needle a clip or two to combat the rich main? I ride on the street just having fun big wheelies and the occasional track day. As far as the AP goes I just turned the adjustment screw by the throttle cables until the squirt was about 1 sec. I'm also thinking of doing the o-ring mod, any thoughts on that?
Click to expand...

the o-ring mod is a definate yes for a big improvement on the cheap
 
Thanks for all the help. How do you know when your main is too small/big. From what I'm hearing plug checks don't work and because I don't want to burn this thing down what do you do to check the main. I will get a bunch and go lower but where do you stop?
 
You can solder up the one brass jet and drill it out to suit. Some jet drills like http://cgi.ebay.com.au/0-3-1-6MM-HSS-MI ... dZViewItem are helpful and not to expensive.

Its a good idea to mic the drils just to confirm the sizing. A set of number drills gives you some more main jet options.

Lots of good jetting advice in the 'doc' http://www.husaberg.org/wiki/index.php/Carburation

A you progressively lean a carb from a rich setting you will get improved throttle response and more 'revability'. When it goes too far it'll start to surge, it may backfire and it feels like its starving. You'll know.

Steve
 
as steve says.

do a direct and immediate comparison but you should be quicker/ zippier in acceleration. if you have a stutter it can be cured with the PS underneath.

midrange is the needle.

you won't be lean at 165 just BETTER. 160 could be better and if it isn't you'll know because you'll rev it through 1, 2, 3, 4, and 5 and then put it into 6th and it'll either be slower or roar a lot and be only as quick as the 165.

that's why we gave you the advice to buy two jets and test them this way.

we're treating you as a thick idiot and that we we're taking care of you.

regards

Taffy
 
Sounds good. Thanks Taffy and everyone else that responded. You have given me a lot to work with.
 
question about jetting from new member

Hi I just got the same bike and have a couple hours on it ,I live in central Alberta .
it had the restrictor plate and exaust baffle removed , (still have) now according to this post plug reads dont tell much ..but any way mine is a light tan for the record ...
I hope you guys can talk baby talk to me too because it sounds like you know what is up with these bikes .. mine pops a bit letting off at higher rpms too as yours does . but seems to run very well .so did changing anything help ? if so what did you do exactly and how ? have you checked the valve lash yet? Im doing mine tomorrow ..the owners manual says not to change the break in oil ..did you get an extra needle and jet with the bike ? how lean is too lean and how do you recognize this condition?
Great forum thanks for any info ..Leon
 
..Can I join the thick idiot club too taff ? like your avetar by the way .. I too have the 07 550 and found it a bit flat after shifting to 6th gear .. should it roar ? the bike has mabee 2 hours on it and the restrictor plate and pipe baffel are out 1784.4 foot elevation here .. and minus 10 C during this test run .. the bike is just snotty starts and Idles well and plugh is a light tan more on light side .. where do I start same as your advice previous ?thanks Leon
Taffy said:
as steve says.

do a direct and immediate comparison but you should be quicker/ zippier in acceleration. if you have a stutter it can be cured with the PS underneath.

midrange is the needle.

you won't be lean at 165 just BETTER. 160 could be better and if it isn't you'll know because you'll rev it through 1, 2, 3, 4, and 5 and then put it into 6th and it'll either be slower or roar a lot and be only as quick as the 165.

that's why we gave you the advice to buy two jets and test them this way.

we're treating you as a thick idiot and that we we're taking care of you.

regards

Taffy
Click to expand...
 
adjusted valves changed plug

runs good still sounds happy or my wishful thinking ..gotta gather parts ..concidered a dean jet kit is this ness ? can I do as you suggested solder and make a jet ? as soon as I get in the carb i will tell you guys whats in there ..stock or is there a variance possibility ? checked new plug after ride looks very light tan almost white ..pipes a bit blue now ..what are signs of lean condition? bike goes like a raped ape again should I dump oil they said in letter with bike to leave it in for 5 0r 6 hunderd miles thats 1600 k is this what you would do? I adjusted the level it was over full a few table spoons ..
when you adjust valves do you squeeze the feeler fairly hard ..? I know how to adjust valves but this seems to want close tolerances ..I redid it again just a tad tighter again this is the most insane thing i have had beerween my legs for a while I weigh 280 and it trys to dump me off the back if I dont hang on tight still cant stop smiling ..how bizzare
guess i need to concider the temp too its minus 10 c again today and dry ..

Leon in Cold Lake AB canada
 
RE: adjusted valves changed plug

well the 172 jet lets me roll on in 6th this of course is running the extra r needle that came wjth the bike its seems a good trade for the way it ran out of the box...450 k now on the bike and havnt been down knock on wood riding aggrsive and testing the limits whenever possible LOL ...i agree with mike the bike is a hoot to ride and tracks great ..I weigh 280 and find the suspension acceptable and the power very snappy ..anyone else got the same bike ?
 
After some tweeking here is where I'm at:

I'm down to 165 on the main (but going to try the 160 this week), It just keeps getting faster. DVR needle 4th clip, 42 pilot (big improvement but going to try 45 as well). I have played with the o-ring on the accelerator pump but it seems like the way it came from the factory works best on the street. With no o-ring (just a hint of bog) I can roll on 3rd gear wheelies but when I put the o-ring no bog but no roll on 3rd gear wheelies.
 
hows the bike holding togeather ? how many K now ? what maint are you doing ? mine is 1600k only .running really well
 
You guys should pm sparks as he has the same bike as you and has found a good set up.

If you haven't already, have a look at Buzzards $40 spruce up, there find the Honda ap diaphragm that cut's down the ap squirt from 3 seconds to about 1 second.

Also, fitting the factory pro emulsion tube is a big plus for responsiveness.

You might also try going to the Honda NCVS needle @#3.

Taffy has got you there for the main. See the doc and his advice for decreasing the size of the pilot jet further, and adjust the paj accordingly.

Here is how I currently have my 2004 FE550E set up for 4400' and 50-80F:

Needle: NCVS @#3 $20
Factory Pro HDJ emulsion tube. $20
Honda ap diaphragm $25
ap timing gap: .130"
R and D racing adjustable leak jet ap cover ( adjust as necessary) $90.
R and D racing ap arm spring $15.
Main Jet: 160
Pilot Jet: 38
PAJ:100
MAJ:200
 

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