Howdee guys, and gals
First of all I wish y’ all had a great Christmas and whishing y’all a happy and safe New Year’s.
OK, to make a long story short: I have a 2005 S40 with 1,800 miles on it. I’ve been following your discussions and experiences dealing with your bikes. I decided to do a little mod to mine so I got  Lancer’s jetsets, got a set of brand new Dyna mufflers on eBay (and Routy’s forward controls adaptor).
I installed the Dyna muffler initially (still have the other Dyna if anybody is interested) and had some trouble trying to connect it to the exhaust pipe, tried the gasket but had too many leaks so I got the exhaust adapter from Ryca, it worked like a charm, perfect. I installed a cone air filter and proceeded to install the new jets (main & pilot). I initially did the 150 main (leaving the stock pilot), replace the spacer with the washer provided on Lancer’s jetset kit also I unplugged the pilot screw per your instructions.
First thing I notice was that the bike did not need to choke to star and I’ve read somewhere that Lancer made a comment about having to rich of a mix, I was able to fix that but it was running real rough and backfiring a lot, it had no power (acceleration) whatsoever. OK, I went up on the main to 150 and the 55 pilot. Now it runs better (the engine seems to be smoother) but still has no acceleration at all. I put the throttle down and it goes nowhere, it eventually gets to 50 or 55 but that’s it.
Ah! I have a motorcycle mechanic that suggested that the air cone may be the culprit but, I reconnected the air box, and it still socks (performance).
I will appreciate any help any of you can provide
Thanks!

I took it a part. I followed Serowbot's guidelines "two step increase in the overall jetting.... From stock,.. say, from a #145 to a #150 main,... from a #52.5 to a #55 pilot with a little more opening on the idle mix screw (1/2 to 1 turn more)... and a reduced spacer thickness on the needle" with the three washers that came on Lancer's jetset.
Serowbot mentioned that the spacer affects accelarations and that is where my problem resides. Should I put back the stock spacer? just wondering

I have the raptor. I reconnected the airbox (not using the air cone anymore) there was no change in the performance at all (cone or airbox). In my original posting I stated what mods I did (dyna muffler, rejeted the carb). Installed a cone air filter originally when I did the dyna and the rejet but reattached the airbox back when performance did not improve.

Yes, I know that. I made sure the filter was not blocking anything in the carb. Anyhow, I am not using the filter, I reconnected the air box.
Below is a picture of the filter I used (Emgo stainless mesh filter ). Again, the filter is not an issue (if it ever was one) I am using the stock air box.
I reshaped the filter just like you did yours in your post before I  installed it. I've read your post about the cheapo filters and their problem blocking the intake on the carb  
For now , I will be running the stock box and I will use a K&N instead (for the air box)

Thanks guys for your replies.
Verslagen1 wrote:
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You mean the the one I used on the first step? the 52.5 pilot (stock)

Quote:

I've already went up 2 steps from 147.5 to 150, to 152.5

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How do i get to 70 ?  
I've also done the white spacer mod already

As is now the mods are:

• The Raptor

• HD Dyna muffler

• 152.5 Main, 55 Pilot

• Replaced the white spacer with the 3 washers from Lancer's kit

I don't know?
I know that the stock jets did not work properly, the bike had a hard time running after I installed the muffler and the cone filter, that's why I went to the first step mod (150 main jet) and then the second step (152.5 main, 55 pilot).

I think I am going back to the first step 150 main and 52.5 pilot and put the stock spacer back and see what happends. I will also leave the air box and get a K&N that fits the air box (althought I like the looks with the cone)The spacer affects acceleration, and that is the problem I am having. I'll find out.

I am planning to get one of those 36mm Mikuni VM round slide carburetor from Lancer eventually but for now, I just want to have some fun with the bike.

Hello Bubba,

Performance wise I was getting whatever you can get with a stock bike. Now, I am getting nothing (stock, even if it sucked was better) but with the mod I should be getting a slighty better performance. And even though it has no acceleration the engine seems (maybe wishfull thinking) to be a lot smoother than before. And it sounds way better than before

@Justin,
Nope it is not sticking. Oiling? I did not recall oiling it anywhere. I just replaced the spacer with the washers and the needle seems fine (spring moving fine, no sticking)