Induction kit / trumpet sock / foam panel ?
 

I have just been looking on the demon tweeks web site for a replacement air filter for my 748. It listed the above Pipercross filters ranging in price from £20 - £100. Should I just go for the £20 or would the others be better ?

the £20 one is best IMO
you will need runers in your air tubes though

Excuse my ignorance, but what are runners ?

filters
 

They are standard replacement filters. i.e need to fit in standard airtubes or carbon ones designed to take standard filters!

"In tube" filters every time for me. At a push use the type that cover the inlets into the airbox on the tube side.

Anything that goes inside the airbox reduces its volume or reduces the positive effects of the airbox size/shape.

If you're a regular gravel trap visitor It might make sense to use a filter over the trumpets/in the airbox to stop gravel getting in to the inlets when you knock the tank off!!

You might get some of the loses from an undetank setup back with a dyno session/ FIM CHIP or PCIII but in my expererience you won't get the throttle response you get with in tube filters.

Ray.

Do you leave the grill's covering the air vents in the nose fairing or remove them...?

i remove them

Ive taken a look under the tank of my 748 and couldnt see any sighn of an air filter, so i guess that means there in the air tubes as the above post talks about, how do i get to them and how often should they be changed?
any recomendations on what type to use...

Cheers Simon

have you got carbon or original

Original filters go inside the plastic air tubes that run inside the fairing to the airbox under the tank. You need to remove the fairing and tank, then you can unclip the air tubes from inside the airbox and remove them. Then it's about 7 or 8 screws to remove and the airbox will split in half so you get access to the filters.

If you have carbon air tubes, some of them have the runners inside to hold the oem filters in place. Many of them don't though, so you need to use a different type of filter like the inner-airbox ones.

Pipercross do excellent replacement filters for the air tubes. They're a two-layer "washable" foam that filters better than the paper oem ones. You can clean and re-oil them (this traps the dirt) so once you've bought them you don't need to buy any more, whereas oem ones get replaced every 2 years as part of the major service. Pipercross filters are about £20 from most Pipercross dealers, or Demon-Tweeks online. MPX-038 is the part number I think.