I'm fixing to install a Supertrapp. I'm not going to run over 8 disc. Could care less about the noise and I don't want to lose any torque. I'll take torque over horsepower any day. I've removed the cover from the pilot jet and come out 3 turns. I'll probably start off with 7 disc. Would I gain anything by changing the main jet or raising the needle other than burning more gas?

I have a super trapp with 9 discs in it, im going to get the next size pilot, as i keep the air mixture screw out about 3 to 3-1/4 and i get lots backfire on decel

The main you might wanna go up, i did and noticed a big difference, i have dyno jets (and im about sick of them becasue they use a completly differnt way to number the jets and it confuses the hell out of me comparing them, the needle is great though. over priced?)

What works best is to tune the engine for the max available power at the rpms we actually run at.  The shape of the power curve can be changed with engine tuning...intake, exhaust, fuel system, cam profile, etc....and fattening the power curve at mid range rpms is actually the goal that puts smiles on the faces of most of us.  Peaky high rpm max power and flat power curve in the everyday rpm range makes for good marketing copy but not the happiest riders.
[/quote]  I've done it before but my experience has always been the more open the exhaust  the more torque I lose. Its a lot of trial and error if you're not lucky. I was planning on using the 6 to 8 disc that come with the Supertrapp. I've opened up the pilot and my exhaust has quit blueing. I must be pretty close with the stock muffler. I just wondered if someone was running a Supertrapp with 6 to 8 disc and knew the magic formula. I might eventually do as Serowbot has suggested, order a K&N and open her up. I'll probably have to order more disc. Anybody got any disc laying around they want to get rid of?

Serowbot wrote on 08/19/09 at 16:47:03:

What did you use for a spacer and where can I find one? I read a post that recommended removing the entire spacer, but I'd rather try 1/3 first..

I am running 6 disks in my Supertrapp and haven't had to rejet. Mine turned blue but that is because I didn't clean it good enough before starting the bike. Read the instructions because they tell you that if you DO NOT clean the muffler, the oil will cause it to blue. As far as rejetting, it depends on where you live. Supertrapp states that one should be able to run up to 6 disks without having to rejet. Each bike will be different though.

#4 worked for me.

-D. Dwarf

I went ahead and installed the Supertrapp with 6 disc. I've removed the brass plug in front of the idle jet. I came out 3 and 1/4 turns with the idle jet. With 6 disc the Savage is running great. Its not blueing the pipe. For now I'm going to ride. This winter I'll probably get a K&N air filter and rejet everything but while riding season is here I'm putting her in the wind. Seems to be a lot quicker with the Supertrapp.