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I'm starting into the cleaning the carbs for the first time(going to unplug the pilots and do the airbox mod too). I'd like to add a fuel filter. Are there any recommendations on which one? I'd rather have one with a media(paper) filter rather than just a fine screen. I don't know if the fact that it is gravity fed and has no fuel pump is a factor on the type. I saw one post about using a small engine filter but I'm not sure about the flow capacity. A lot more fuel will have to flow through it than a 10 horse riding mower. Any ideas or thoughts?

Thanks!
 

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The type you want is a brass media (or bronze or something like that.) I used a $4 Briggs and stratton lawnmower filter. It's red in color, flat and round. worked good. JC whittney have few you should look into.
 

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I have the 1/4" one on my bike. It doesn't leak.

Also - having a clear one is nice because you can see what is coming out of the tank. On my old bike, it let me know that the petcock was disentegrating before anything bad happened. Saved me a lot of trouble!
 

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Make sure you get a small enough filter. I just put one of those typical lawnmower type filters on and it's small enough BUT , it's a big painINtheASS to get in that small space . But if its all you can find in a short notice then it'll work with a little luck.
 

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Sorry about reviving an old topic, but I was looking to get a fuel filter as well. Is that "90° SLIM LINE FUEL FILTER" working well for anyone?
 

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eXce!!eNt said:
Sorry about reviving an old topic, but I was looking to get a fuel filter as well. Is that "90° SLIM LINE FUEL FILTER" working well for anyone?
as long as the filter is designed for a gravity feed system it should work.
 

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This is perhaps a stupid question, but here it goes:

My Haynes manual says the EX already has a fuel filter, as part of the fuel tap. So what you guys are talking about is a supplemental filter?
 

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Yes it has a screen as part of the inlet stand pipe, and a seperate one for the reserve standpipe. but you still need the inline filter. This will catch the little piece of rubber that you will shear off the inside of the fuel line when you push it onto the petcock nipple. (one of the most common causes of carb float valve malfunction)

FOG
 

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don't lay it flat. My next one, which should be here any day, will be install on the vertical piece of line coming up from the carbs just high enough for the hose to go across the top of the carbs to the petcock
 

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OK, I have a few questions after installing a fuel filter. I got the 90* sintered brass one (http://www.heeters.com/fuel.shtml#fuelline)and have it installed horizontally to the rear of the carb. Also bent some aluminum tubing to make a 90* after the filter straight down to the carb. All connected together with 5/16" hose of course. That make sense? Anyway, after doing this, the bike seems to have a slight hesitation under 6k rpm. (Like driving against a head wind.) I don't remember this before the addition of the fuel filter. Any one else experience this?

I installed the filter in the same weekend that I dropped the bike in the grass. I noticed that after the drop, it was much harder to start the first time. Did it dump the fuel from the float bowls or something?

I'm not new to auto mechanics (been repairing cars for 20 years), but this is my first bike; 2007 model with just under 700 miles. So, if one of the above hasn't caused a hesitation, then I guess that I'm ready for a faster bike??? ;D

Also, I have a ringing or buzzing occurring from 4400-4600 rpm. Any ideas?

Thanks to everyone in advance.
 

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the buzzing or ringing you hear is most likely the same thing my bike does, i'm not so inclined to find it but something(i think its the lower fairing) is hitting its resonant frequency in that rpm range and vibrating against something else. Resonant frequency is funny stuff, but the best way to describe it is watch your mirrors and slowly rev the engine, the images in the mirror at certain rpm lose image distinction, this is because the mirror is vibrating at or close to its resonant frequency. Nothing to worry about. The other 500 i rode did the same thing.
 

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I get the same buzzing in the same 4400-4600 range. Must be common to the 500R. ninjamon
 

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I changed the position of the fuel filter from horizontal to vertical and that seems to have made the difference in the hesitation. I'll know better after a good ride without rain. I didn't think much about the position since I've seen other engines with the filter mounted horizontally.

I think I only uncovered one other post that briefly mentioned mounting the filter vertically, but no explanation was given. If others are having a problem with hesitation due to this, it may need to be mentioned in the fuel filter sticky.
 
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