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March 29th, 2008, 10:02 AM   #1
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05 fs650 jetting - sorry to bring up more jetting questions!

Doesn't seem to be very many FS650 riders on here more FE models?

I have a std 05 model except it has a full acro system on it, current jetting is stock as per manual as I have checked it.

Am wondering if anyone has any good jetting suggestions as to what I can tweak to get the engine to actually use the acro system to squeeze out some more power?

Currently it will pop the wheel up in 1st given a hand full but 2nd and 3rd no way!

it has a 38 rear and 16 font which doesnt help so will be putting the 15 back on the front asap!

Cheers!
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March 30th, 2008, 12:40 AM   #2
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RE: 05 fs650 jetting - sorry to bring up more jetting questi

04 FS650, 17/38 gearing, MJ 165, EKR needle #4 clip, 45 pilot, modified std exhaust. Power wheelies in 3rd.

It had 178 main and #6 clip, was very sluggish into the mid and the top end was flat.

I'll probably go leaner yet.
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March 30th, 2008, 01:05 AM   #3
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Have a go with a # 50 pilot jet 2 turns open on fuel screw 165 main is good &
lower the clip on what ever needle is in your carb by at least two! Then report
back to this thread. Thank you.
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March 30th, 2008, 11:27 AM   #4
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DMS needle on clip 3. 160MJ 35Pj with 45PAJ. no APJ.

it's all in the doc

regards

Taffy
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April 2nd, 2008, 07:07 AM   #5
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dms needle? just to check when you say clip position 3 does that mean 3rd up from the bottom?

Am I correct in thinking that the higher up the clip the leaner it gets and then the lower the clip the richer as more needle will be pulled up through the main?

Also what does no APJ mean? this something to do with the accelerator pump?

Cheers.
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April 2nd, 2008, 08:59 AM   #6
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Originally Posted by husa1983
dms needle? just to check when you say clip position 3 does that mean 3rd up from the bottom?

Am I correct in thinking that the higher up the clip the leaner it gets and then the lower the clip the richer as more needle will be pulled up through the main?

Also what does no APJ mean? this something to do with the accelerator pump?

Cheers.
Hi husa,

Yes that is correct clip #1 is the top groove.
The easiest way to disconnect the AP is to remove the three small allen screws that hold the pump diaphragm cover, with the diaphragm and spring removed you will see the rod poking through just pull on this with a pair of pliers and it will come free.
Just reassemble the diaphragm spring and cover.
Failing that you can do the BK mod that is in the Doc.

Regards

sparks.
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April 3rd, 2008, 09:21 PM   #7
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why not use the AP, what did husaberg put it on there for if its no use?!
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April 3rd, 2008, 09:49 PM   #8
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oddly enough, all bikes come with small details that can be improved. you'll find especially the japanese, keep an eye on what is being fitted to their machines and incorperate it themselves.

i use a small amount of AP.

regards

Taffy
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April 3rd, 2008, 11:28 PM   #9
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Originally Posted by Taffy
oddly enough, all bikes come with small details that can be improved. you'll find especially the japanese, keep an eye on what is being fitted to their machines and incorperate it themselves.

i use a small amount of AP.

regards

Taffy
You bugger Taffy you told me you had turned it off all together.

The FCR wasn't pacifically designed for the Husaberg, it just came with it, that's when people think are if it has got it on then we must need it.
But you'll find some 4 strokes need more AP than others thats why it's there. The main problem with the one fitted to the Husaberg is that it is not calibrated 3 secs is ridiculous, but by doing the BK mod you can achive this.
I tried 1 sec duration on mine and it didn't make any difference to the performance so I just turned it off, but there again I'm on the road not on the dirt and don't require sudden big hand fulls of throttle this is the difference I think.

Regards

Sparks.
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April 4th, 2008, 01:17 AM   #10
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Sparks you have said the answer to this question I thank you well done!!!

Different types or venues is as much a factor as different styles, all of the set up
is personal,we do not all ride in the same maner do we? Now if this idea makes you
think a bit this was the tread i was looking for to give my side & was well over do!
If one would take responsibility for there ability they would more often ask what
type of training is going to make me better!Of course this is just to much work for
most. Keep on spinin & grinnin!
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