Hello Newbie need help.
 

Hello greetings from Singapore!

I am Francis.
I just bought a 3 years old XT660Z last week
with 19,800km mileage on it. I am the 3rd owner.

So first thing i did was to give her a new engine oil + oil filter.
Took it out over the weekend and had a blast!

• Suspension is too soft for both front and rear. Will fix that.

• Bikes got lots of backfiring when closing throttle. Bike comes with LeoVince slip-on exhaust. Is that backfiring normal..?

• Tyre is gone as well. I am looking for a 70% road 30% off-road usage. Any great tyre to recommend?

• Upon other inspection i found something underneath the seat which i could not identify what is it for? I also don't have the manual to refer to either. its a small little black box approximately 4cm X 4cm and 1 cm thick with a knob about the size of a toothpaste cover that can switch clockwise from 6 o'clock position to about 5 o clock position. it has a thick rubber wire housing attached to it that ran to somewhere underneath the petrol tank. I wish i can post a photo but i can't. Am i making any sense here? :)

Would hope to learn more from you guys.
Thanks in advance.

:006: Welcome on board mate.

The backfiring is normal - its the AIS doing its stuff for emission control and cleaning up unburnt fuel in the exhaust.

The small box with a knob on it is a Kev Mod - a fuelling devise to richen up the mixture. You say it goes from 6 o'clock to 5 o'clock, we'd actually say it went from 12 o'clock to 10 o'clock! Same thing, you're just looking at it upside down! ;)

At 12 it is off and fuelling is as stock, increasing it round to 10 o'clock will richen the A/F ratio. On a stock bike it wants to be around 3 and on a bike with intake mods (high flow filter, snorkel removed etc.) it wants to be closer to 6 o'clock.

Have a twiddle with it and see where it runs best.

More info here - http://www.xt660.com/showthread.php?t=11641

Have a look through the threads on tyres to see what others are using. Same with suspension.

Thanks Pleiades!

The mystery of the little black box is solved!
I was scratching my head the whole day trying to figure out what is that! :)

Will surely play with it to find a suitable setting.

cheers and ride safe! :)

Lucky git, to find a free Kev Mod in the bargain.

:hello: and :welcome: to :660: all you need now is this:

http://www.xt660.com/showthread.php?t=1475