Pipes only aren't going to add measurable performance...need to go all out. Don't let the O2 bungs scare you off b/c most manufacturers have stock 18mm bungs, or inserts w/their systems. I haven't come across any requiring fab/welding. Best to look into 2-1 and the choices are many so time to research & see what fits your like/style/budget. Good luck & let us know what you decide.

 

 

Without a doubt you'll get more performance out of a complete 2 into 1 system than with slipons. But either way you go, be sure to get a good tuner to go along with the upgrade.

 

Thunderheader ��

 

You want to think through what your end goal is and then proceed with the pieces.

If you add a K&N air cleaner and open up the exhaust a bit you can get a tad more power, but its not likely to help your torque at all. The added horsepower will also be at the high end of your rpm range. You will lean the motor right out with those mods which is no big deal as long as you to tune it to run a bit richer.

If you want more grunt, well the best route is via cams. And if you combine that with a K&N type air cleaner and a tuned exhaust and then tune it you can get a nice, noticeable boost. You may be able to get a slight boost in torque with an A/C and 2-1 exhaust. So if your working a progressive build that may be a viable start.

All of the thinking behind the Stage 1, Stage 2 ect approach is to maintain a tunable balance on the system. So if you study the stages you can get a better idea of what mods get what returns. A lot of the mods are designed to get higher rpm horsepower or to get lower end torque.

I am into the low end torque and mine produces ~100 ft pounds between 2800 and 5000 rpms. If you check in with the Fuelmoto folks they may be able to advise you on a path to get you where you ultimately want to be. And they do sell a great tuner that they will provide you with maps from their dyno experience.

All of the combinations are well understood so you just have to decide on where you want to go and proceed from there.

 

 

Take a look at the cam specs on the Fuelmoto site.

I got the Wood Performance cams which are actually made to spec for Wood Performance by Andrews. I got the set that produce a slightly wider power band. So between 2800 and 5000 rpms mine kick *** and produce about 100 foot pounds of torque. HP peaks out at 80. They are TW-555 cams. I didn't want to rev the heck out of the motor so keeping the rev limiter at the stock level appealed to me. Also no valve work or headwork needed and no high compression issues to deal with. No need to change out the stock springs on the valves either. When I ordered the pipe I told them to set up the number of disc's for the cam I was getting so the pipe came dialed in for the combo I was installing.

The bike is a serious hot rod now and the difference is huge. And its enough for me plus I don't think I am seriously over stressing the motor. It lopes a little at idle. And it grunts when you twist the throttle!

I have a TTS tuner (jumped the gun and got that last year). If I were doing it over I'd get the Fuelmoto Dynojet tuner. I loaded a tune for a Harley Screamin Eagle cam set with a very similar profile. It works fine. I have done a few adaptation runs to tweak the tune but it never was bad. The cool part about the Dynojet from Fuelmoto is they will give you a tune developed on their dyno for your combination of parts. I am getting about 40 to 42 miles per gallon.

So budget wise you could go air cleaner, e series pipe, Dynojet and then tackle the cams when your pocketbook recovers. They will give you a tune that will let you run cooler and get the most out of just an air cleaner and a 2-1 pipe if you buy the tuner from them. Then when you add cams they will give you another tune free.

I installed the roller tappets at the same time and used the two piece pushrods with the pushrod covers made for the two piece pushrods. You don't have to pull the heads if you use two piece pushrods and they are known to be reliable if you install them correctly. If you have the bucks to do it all at once they will give you a decent discount and I think they have packages if you buy the tuner. Check with them to see what the latest is.

 

 

If you are doing more work later then a T-Max is the way to go. You get broadband O2 sensors, a full array of tunable maps, and it has a self tune to hit target AFRs.