Extra fuel filters- waste of $?

[DClark]

I think so! I have the stock filter in the tank, but I also put in those plastic filters with the brass metal elements just in front of the carb fuel inlets.
I have about 5000 miles on them.
One of them broke its inlet plastic tube, so I took it, held it upside down in a glass shot glass and sprayed carb cleaner through it. What came out? Nothing!
Did the same to the other, same result.
My theory here is that their porosity is greater than the the filter in the tank. Anything that is too small for the tank filter to catch will easily pass through the little aftermarket filter.
Blew through the filter and even though there is not much resistance, there is still a little so I removed the other good filter.

[woobie]

Considering I only changed mine once in 116,000kms (65,000miles) it's not like it was a bank breaker. But like yours mine was pretty clean over the entire life of the bike.

[scottynoface]

I think you're over thinking a piece of $5 coffee filter...

People need to stop trying to reinvent the wheel...

[DClark]

I think you're over thinking a piece of $5 coffee filter...

People need to stop trying to reinvent the wheel...

When you are saying coffee filter, you are implying a filter with a paper element. This one has a metal element, just like this:

http://www.motorcycle-superstore.com/14/71/979/34825/ITEM/Visu-Filter-Large-Capacity-Fuel-Filter.aspx?SiteID=SLI|Fuel%20Filter&WT.MC_ID=10010

Fuel filters with paper elements filter the best but I don't think they will work with a gravity feed fuel system like the Katana as they are pretty restrictive and can cause fuel starvation.

[il_ragazzo]

lol ... I understand your point sir. what your trying to say is that we should be more worried about our petcocks getting clogged than our carbs. valid point... but if you have a petcock filter failure do you want it to go through the carbs too? but then again how often do katanas really have a petcock failure... practically never right?!!! wait.... that doesn't right.

That extra fuel filter may just be the filter that gets you home as opposed to the petcock filter that leaves you stranded...

[DClark]

lol ... I understand your point sir. what your trying to say is that we should be more worried about our petcocks getting clogged than our carbs. valid point... but if you have a petcock filter failure do you want it to go through the carbs too? but then again how often do katanas really have a petcock failure... practically never right?!!! wait.... that doesn't right.

That extra fuel filter may just be the filter that gets you home as opposed to the petcock filter that leaves you stranded...

You said petcock failure, then petcock failure. I really don't think they are the same. A petcock failure can be where it keeps flowing fuel when it shouldn't. Yeah, that has happened, but I don't see how extra fuel filters will help. Fuel filter failure? Who has had THAT happen?

[Kreylyn]

There are a couple of members who don't like that I've been saying this for most of the time... fuel filters on a kat are a waste of time. If they don't slow the flow of fuel, then they aren't catching anything the petcock screen won't. If they are finer than the petcock screen, then they slow the flow of fuel causing running issues. And if they actually do start catching anything, they quickly clog up, BUT... that doesn't prevent the carbs from getting dirty. The reason for that is ... if you have something that is clogging the filter, it's not all one size particles. Rust for example will have a silt so fine, there is absolutly no filter out that that will catch it all and still flow fuel with out being pressurized. We don't have fuel pumps... so in the end it really is as you said... a waste.

Krey

[cintidude04]

There are a couple of members who don't like that I've been saying this for most of the time... fuel filters on a kat are a waste of time. If they don't slow the flow of fuel, then they aren't catching anything the petcock screen won't. If they are finer than the petcock screen, then they slow the flow of fuel causing running issues. And if they actually do start catching anything, they quickly clog up, BUT... that doesn't prevent the carbs from getting dirty. The reason for that is ... if you have something that is clogging the filter, it's not all one size particles. Rust for example will have a silt so fine, there is absolutly no filter out that that will catch it all and still flow fuel with out being pressurized. We don't have fuel pumps... so in the end it really is as you said... a waste.

Krey

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