The New And Improved Unofficial R65 Forum V2
Technical Discussion => BMW Technical Q&A, Primarily R65 => Topic started by: Mike V on December 05, 2010, 10:35:58 AM
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Guys, I'm having a hell of a time with getting my carburetion where I want it. I believe the culprit to be red lead primer debris still flushing itself out of the tank after numerous tank flushing's during the restoration and making it's way into the carb bodies. I've cleaned the bottom of the bowels out numerous times. I'm replacing the coil this morning. Then I'll go back through the carbs for a clean and flush. All other elctrics are in fine shape along with plug wires, timing, valve adjustments etc. It's the common transition zone from past idle through mid-range. All jetting is stock and don't want to start changing the jetting until all other possibilities have been eliminated. The symptoms are a slight starvation zone - feels like it doesn't want to pick up responsively. Anyway, my question is...what are some part numbers and types of small but good paper inline filters to install. I currently have the sintered inline fuel filters installed and they obviously are not doing the job. A trip to Napa the other day only offered the fist-sized automotive paper inline filters. I know this has been covered before but can't find any historical info.
Any recommendations for filters, PN's, suppliers, etc?
-Mike V.
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Mike this is what I've been using the last three years on the '81 R65 .
No fuel delivery problems yet and the filter has a large filtering area, so it won't get clogged easily .
It's specifically made for gravity feed fuel systems .
http://www.itw-fastex-cva.com/images/stories/data-shts/visufilter/8437-00-9909.PDF
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Bob,
Nice. Any particular supplier you deal with for this? This is exactly what I'm looking for and small enough it doesn't rest on the inside of my left calf!
-Mike V.
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I got mine from a bike shop in Carson City, Nevada, they were the only one that carried it at the time .
Bike Bandit, which I think is still located in the Sandy Eggo area, carries them .
http://www.bikebandit.com/visu-filter-high-flow-high-capacity-fuel-filter
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You are da' man! Right in my backyard the entire time. Thanks Bob.
-Mike V.
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Snowbum recommends the Napa 7-02323 filter. I keep meaning to pick one up.
My old nylon filter with a metal screen finally cracked after 3 years, due mostly to the strain of the S-curve of the fuel line between the petcock and the T connection. Besides the filtering, its nice to have that clear section in the fuel line so you can actually see that there's gas moving through the line.
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When I looked around for an in-line paper filter the common references pointed to NAPA SME 702323 and 3011 and the FRAM G4164 filters. These are designed for a universal fit for 5/16 and 1/4” lines which makes them longer than I wanted. As the NAPA SME702323 is a small engine/gravity flow type filter I went through other small engine references and came up with the Briggs & Stratton 691035 (I've seen it referenced as a part number of 491629). It’s a 60-micon filter with 1/4” single-barbed connection bosses. Importantly for me, with a 35mm/1.40” body length (the NAPA etc are about 85mm/3.5” effective body length) it fits my length preference.
They are also available off the shelf in the lawn mower supplies section at Lowes and Home Depot or online at places like Amazon for around $4.00 each.
I did do a flow check when I first got them. I forget the details, but know they passed with flying colors. In service, they work fine on both my R65 and my R100RT.
Monte uses them as well.
Mark
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FF2314 from Autozone works for me on all my bikes!
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...Monte uses them as well.
Mark
Yep. If it's good enough for Briggs & Stratton, it's good enough for both my R65s.
I flush the tanks regularly, inspect the petcock screens and keep a Mk1 eyeball on the filters.
Monte
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Timely topic for me. Cleaned tank, removed inline glass fuel filter horizontally mounted, and installed vertically, a NAPA paper fuel filter SFI 23011 with a 20 micron rating.
Apparently, at low fuel levels, the 20 micron filter resistance virtually stops flow, which I thought was time to switch to Reserve, which did not restore flow either.
So, I'll try the Briggs & Stratton filter and see if that solves my low fuel level issue.
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Bob Dominguez
'83 R65
Cerritos, CA
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I just have the usual brass fine mesh filter that fits in the bottom section of the fuel tap and don't actually have many problems - hardly a spec of red stuff when I drained the tank this winter. What I have seen somewhere though that seems sensible to add are long versions of the mesh filters that fit over the fuel tap straws inside the tank. Does anyone know if they were a standard fitment or an extra or perhaps they were used on older airheads ?
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The Germa fuel taps didn't come with the screen over the intake tubes, but the Karcoma fuel tap did come with them .
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Thanks Bob, I have the karcoma tap so mine is missing then. I should have looked at the parts fiche because there it is. I have the small strainer item 4 but not item 12. Don't know why but I thought I'd seen individual strainers over each straw when it's actually one large strainer that fits over both and it looks as though it fits in from below with a crush washer to seal between the tap and the tank. Maybe they were prone to leak and got left off.
(http://)
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Motobins has the in tank filter screen, I don't know if it will work for the Germa taps or not .
http://www.motobins.co.uk/displayfinal.php?q=093c&s=1&subs=093c&model=&bike=&title=KARCOMA FUEL TAP PARTS