Hi guys, greetings from Finland. Been searching, but don�t seem to find the answer. My bike is 2011 xtx, with arrow slipons, DNA stage 1&2 and the rapid bike easy. Just fitted the stage 1&2 the other day and blocked the AIS. Works well and sounds nice.

Before i fitted the stage 1&2, the fuel ratio switch in the rapid bike modulator was set to +2 as the manual recomended with slipons.

So my question is, do i need to adjust it upwards since it now gets more air?

Great forum by the way, keep it up!

Firstly - Welcome to XT660.com

The answer is almost definitely yes! You're engine will be pulling in a lot more air now, so more fuel will be required. The filters will have a much bigger effect on the air/fuel ratio than the pipes.

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Thanks Pleiades, i had the same thoughts. I have it now set to +3, that is as far as the trimmer goes. Will try it out as soon it stops raining...

But i would still like to know more about the device, since there is so little info around. So any info is welcome.

There are two trimmers, first goes from 1 to 7 and says "setting". Setting for what? Manual says to set it "6 for stock bikes, 5 for bikes with aftermarket exhaust". What does that trimmer do? Should that go down with the stage 1&2?

Second trimmer says "fuel ratio", so thats a dead giveaway. It goes from -3 to +3.

Manual does�nt explain anything, it�s A4 piece of paper. It only shows how to install it, and the recomended settings for the trimmers with aftermarket pipes. Emailed dimsport(manufacturer) but they seem to be busy with something else.

Ok, took it for a test drive for about 100km. Maybe it�s just me, but seems to be running smoother, more responsive to throttle and the engine sounds better. Also felt like there is more low end torque, never been so easy to pop a wheelie, or maybe it�s just because of the better throttle response. So it was probably running a bit lean.

Still, i would like some input from anyone who have the same setup as me.
I can�t be the only one, or can i?

Well how is it wired into the bike ??
I'd guess it does a similar job to a Kev mod, but in a much more expensive way

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you win some, lose some, crash some
K+N filter, snorkel removed, homemade kev mod (with his blessing), co raised,
Pipeworx cans, r1 led back light, under tray removed, small indicators, handguards, cnc short levers,

Only Rapid bike I've come across is the same as a PC,but never gained the popularity that a PC has.