Air filter

[pyro_]

Any specific recomendations for what air filter to use on a stock B4?

[Squishy]

The stock one? Or K&N - but that might make your bike run lean

[pyro_]

Just wondering what is recomended to use be it OEM, K&N or something else.

[Octane]

If the bike is stock standard - use a stock standard filter OR an aftermarket "standard type" filter. Not a K&N, it will upset the carburettor jetting and just cause you more pain and $. Just my 2 cents.

[Chris H]

The K&N Bandit fitment is a stock replacement but you are cheaper getting a standard type foam filter.
Foam filters are around £10 on ebay.

[tomacGTi]

I use the green UNI foam myself.

Cheap and flows better than stock, you'll have to adjust the carbs a slight bit.

[Squishy]

Which K&N is a stock replacement?
http://www.ebay.com/itm/SU-0008-K-N-Air-filter-Motorcycle-SUZUKI-GSF400-BANDIT-/170743376792?pt=Motorcycles_Parts_Accessories&hash=item27c1192b98&vxp=mtr

That one allows more air..right? I can't find any other K&N filters for gsf400

[Chris H]

Which K&N is a stock replacement?
That one allows more air..right? I can't find any other K&N filters for gsf400

No it does not flow more air.
Yes it is a stock replacement.

[Squishy]

Which K&N is a stock replacement?
That one allows more air..right? I can't find any other K&N filters for gsf400

No it does not flow more air.
Yes it is a stock replacement.

Ok thanks.
I'm asking because most sites list it as "high flow/higher performance" filter.
Like here:
http://www.ebay.nl/itm/K-N-HIGH-FLOW-AIR-FILTER-SUZUKI-GSF-400-BANDIT-91-95-/300123348437?pt=UK_Motorcycle_Parts&hash=item45e0beddd5

[Chris H]

Ive ran a few different types of filter and the K&N is well made and washable (buy once) but if it flowed more air you would need to up the jetting and stock jetting is ok.
IF you live in the UK ive one you can have for sensible money.

[Squishy]

Ive ran a few different types of filter and the K&N is well made and washable (buy once) but if it flowed more air you would need to up the jetting and stock jetting is ok.
IF you live in the UK ive one you can have for sensible money.

Okai.. I already have an open exhaust so I already think its a bit lean even though I set the clips to +1 rich.
That's why I don't even want it to become a little leaner.

Just for the record, then this is the one that does allow more air?
http://www.ebay.com/itm/K-N-Air-Filter-Suzuki-GSF400-Bandit-91-95-/390237300546?pt=Motorcycles_Parts_Accessories&hash=item5adbf4a742&vxp=mtr

Thanks

[Chris H]

Just for the record, then this is the one that does allow more air?

Dont think im having a go or anything but which part of 'it does not flow more air' dont you get.
Its a selling quote, they aint going to say its low performance.
The SU-0008 K&N is a stock fitment and runs ok with the stock jetting.
The most restrictive part of the air intake on the B4 is the air box taking its air from the rear, its stale and restricted by allthe gubbins etc.

[Squishy]

Just for the record, then this is the one that does allow more air?

Dont think im having a go or anything but which part of 'it does not flow more air' dont you get.
Its a selling quote, they aint going to say its low performance.
The SU-0008 K&N is a stock fitment and runs ok with the stock jetting.
The most restrictive part of the air intake on the B4 is the air box taking its air from the rear, its stale and restricted by allthe gubbins etc.

Well, I hear all the time that K&N filters will lean out your bike and you will need to rejet. In fact i've never heard otherwise. Even all the maintenance shops say that. So if the 1st one ins't letting through more than which K&N filter does?

[Chris H]

? Both the links are the same SU-0008 filter.
THE K&N FLOWS NO MORE THAN STOCK
Ive had a B4 on a dyno with the K&N and the bike was not lean with the stock main jet.

[rider123]

The 1200 K&N flows way more air however it's 3 times the size, for the four hundred you should be ok.