Air Filters and carb boots

[macmivvi]

Looking for a filter to install with Ivans Kit and saw Hiflo filters on ebay for approx £20, K&N and Piper £36 and BMC around £40.

Is this Hiflo a High Flow filter or direct replacement for standard ?

I could not find any info on filter regards spec but one link suggested that HiFlo also make K&N filters or it was the other way round.

I,m presuming its a paper version of K&N and not washable ,anyone ?????????

Also having watched my carb rubbers deteriorate the past 3 years just checked depth of one of the cracks @ 3.67mm which was a bit scary, still a couple of mm left but not worth the effort of porting .

Just trying to say that the crazing/cracking of boots is not something to get paranoid about but dont ignore it for too long.

[Slaninar]

Looking for a filter to install with Ivans Kit and saw Hiflo filters on ebay for approx £20, K&N and Piper £36 and BMC around £40.

Is this Hiflo a High Flow filter or direct replacement for standard ?

I could not find any info on filter regards spec but one link suggested that HiFlo also make K&N filters or it was the other way round.

I,m presuming its a paper version of K&N and not washable ,anyone ?????????

Also having watched my carb rubbers deteriorate the past 3 years just checked depth of one of the cracks @ 3.67mm which was a bit scary, still a couple of mm left but not worth the effort of porting .

Just trying to say that the crazing/cracking of boots is not something to get paranoid about but dont ignore it for too long.

Hiflo are good quality filters. However, they are (probably, not 100% sure) replacement for stock, OEM Yamaha filters. That means they are paper. Not reusable, washable and not that much of a HIGH FLOW. More like ordinary paper one.

K&N and BMC are similar quality, high flow, reusable (wash, dry, re-oil).


Carb rubbers. I wouldn't sweat it. Just wait until they are bust, then (have them) replace(d).

Cheers

P.S. Hope more experienced foccers will correct this if I said something really stupid. 

[sadlonelygit]

could i just expound the myth of 'high flow' filters.
if you fit an oiled filter, it will clog up with detritus faster than a plain paper filter (think of it as fly paper). pretty soon it will become a 'low flow' filter unless you clean it every 1000 miles or so.
i prefer to coat the inside of the airbox intake with chain lube and use a paper filter.
high flow = high maintainance (ime)

[bludclot]

 
what's the wisdom regarding fitting 4 individual cone filters? it gives the engine a proper old school look which i kind of like...

[Slaninar]

could i just expound the myth of 'high flow' filters.
if you fit an oiled filter, it will clog up with detritus faster than a plain paper filter (think of it as fly paper). pretty soon it will become a 'low flow' filter unless you clean it every 1000 miles or so.
i prefer to coat the inside of the airbox intake with chain lube and use a paper filter.
high flow = high maintainance (ime)

That is not correct. Experiments prove otherwise. High flow filters do allow better airflow. Downside is they allow a few % more of dirt to go through, but that hasn't been proven to be more damaging to any engine. Plus they give better airflow most of the time, unlike traditional filters which give reduced airflow as they are used over time.

Maintenance is a bit of work. However, instead of chainging regular filter every 10 k km, High Flow like a K&N needs cleaning every 20 k km, or even less often.

It costs more, but lasts longer. I've used it for years and like it so far. No problems at all.

[solorider]

Also having watched my carb rubbers deteriorate the past 3 years just checked depth of one of the cracks @ 3.67mm which was a bit scary, still a couple of mm left but not worth the effort of porting .

Just trying to say that the crazing/cracking of boots is not something to get paranoid about but dont ignore it for too long.

my intake rubbers are cracked to hell and my bike has a low speed splutter so i managed to get a set on ebay in a lot better condition than the ones on my bike,but my bike has 70k miles on it

[Falcon 269]

HiFlo are decent quality paper, OE-style filters.  I use their oil filters in my Fazer and both air and oil filters in the R1.

No difference performance-wise between K&N and BMC.  Some K&N filters still come with the top flange moulding slightly too large for the Fazer airbox.  Nothing that a few minutes Dremel-time can't fix, though.