Fuel filters

Discussion in 'Motorized Bicycle General Discussion' started by robbdaman, Aug 11, 2010.

  1. robbdaman

    robbdaman New Member

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    Looking for a fuel filter to add to my build. Saw some dealers have them but I was hoping for more options than just the one crappy looking plastic one. What size is the filter for a 4 stroke? Would 1/8" or 1/4" work? I saw some stuff at Dave's Discount Motors I like:

    jj50x
     
  2. scotto-

    scotto- Custom 4-Stroke Bike Builder

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    Hey Rob, 1/8" is the prefered size and any of those that DDM has work just fine. I actually prefer this one:
    http://www.davesmotors.com/s.nl/c.885035/n.1/it.A/id.6069/.f

    Cheers,
    Scott
     
    #2 scotto-, Aug 11, 2010
    Last edited: Aug 11, 2010
  3. scotto-

    scotto- Custom 4-Stroke Bike Builder

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    Sorry Rob, make that 3/16" not 1/8"....I was lookin at my scooter fuel line.

    1/8" will work however.
     
    #3 scotto-, Aug 20, 2010
    Last edited: Aug 20, 2010
  4. city of angels

    city of angels New Member

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    do you have that fuel filter and which side is up
     
  5. BarelyAWake

    BarelyAWake New Member

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    No love fer the ol' school?

    [​IMG]

    laff

    lol - it's all good, no doubt it'd look awful funny on yer ride ;)
     
  6. scotto-

    scotto- Custom 4-Stroke Bike Builder

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    If your talking to me, of course I do, otherwise how could I prefer it? And in the photo, the end that's down is the end that's up, depending how you look at it....does that make sense? But yeah. I believe the description is there, but sometimes I'll run mine the opposite direction just because.
    [​IMG]
    It's called the crap-trap and it's made for 2-strokes....4-strokes too!
     
    #6 scotto-, Aug 21, 2010
    Last edited: Aug 21, 2010
  7. r00t4rd3d

    r00t4rd3d New Member

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    I got this one on ebay for less then 5 bucks. Metal , cleanable , etc.

    [​IMG]
     
  8. chainmaker

    chainmaker New Member

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    Hey BarleyAwake do You have a part number for that type of filter I saw it once here and did not save it.

    CHEERSbrnot
     
  9. Venice Motor Bikes

    Venice Motor Bikes Custom Builder / Dealer/Los Angeles

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    I was told that it's better to use fuel filters that are specially made for 2-cycle engines (because of the oil mix.)
    I don't know how bad it could really be if you use a regular filter? But it kinda makes a little sense that the oil might not pass through a regular filter as easy.

    I've always just used the kit filters, & if I ever needed a new one?, I use a filter for a weed wacker.
     
  10. BarelyAWake

    BarelyAWake New Member

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    NP mang, it's buried in the Rustoration Build Off thread - ya'd have a heck of a time findin' it lol;

    NAPA 7-02350 Filter Bowl Assembly (complete)
    [​IMG]

    It's like $10 or so & ofc cleanable ;)
     
  11. Mind_Reader7

    Mind_Reader7 New Member

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    They're made for nitro cars :D
     
  12. scotto-

    scotto- Custom 4-Stroke Bike Builder

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    This is what I currently run, they're $4.50 at the local motorcycle supply...

    [​IMG]
     
  13. r00t4rd3d

    r00t4rd3d New Member

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    The threads for the stock petcock are 3/8 ?
     
  14. scotto-

    scotto- Custom 4-Stroke Bike Builder

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    The barbs are 3/16" on the petcock. The clear filter I'm using in the pic above has 1/4" barbs with 3/16" blue fuel line.
     
  15. r00t4rd3d

    r00t4rd3d New Member

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    No , I mean where it screws into the tank. Is that 3/8 ?
     
  16. scotto-

    scotto- Custom 4-Stroke Bike Builder

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    Yes, 3/8" is correct.
     
  17. 2door

    2door Moderator
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    The threads in the kit tank are not 3/8". It is a metric machine thread but it can be modified with a 1/8" pipe tap. Be very careful and don't thread too deep, just enough so a 1/8" male fitting will start good. Let the tapered threads do the sealing. If you have any seapage, SealAll will stop it.
    As for fuel line, I'm not sure how you guys are getting 3/16" I.D tubing to fit over the petcock/carburetor barbed nipples. I use 1/4" I.D (inside diameter) fuel line and it does fine even without clamps, but I do clamp them just for security.
    Tom
     
  18. KCvale

    KCvale Active Member

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    Heck, if you are looking for better fuel filtering, pull your tank filter out if has one, carb too, and then just take your gas line with you to your local auto parts store.

    Something you see into helps.

    I don't know how these $5 to $10 filters on-line only cost that much delivered unless they are part of a much larger order that covers shipping because just shipping a single item like a fuel filter is $5-$10.

    What I have helpful regarding when I need just one part from places like SickBikes or GasBikes is go ahead and buy those little items I am likely to need in the future as well.

    This only works if you build more than 1 bike of course, but it has payed off in spades for me so far.

    I may get laughed at for this too, but I just use premium gas from Exxon and Mobil for my MB's.
    I know the extra octane does nothing, but it is always nice clean gas with some nice additive like Tekron and less Ethanol junk in it.

    In short, unless you are in habit of leaving you gas cap off to let dirt in a simple filter and good fuel should do you just fine.
     
  19. scotto-

    scotto- Custom 4-Stroke Bike Builder

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    Yes Tom, those are metric pipe threads equivalent to a US 3/8" per se. The poster asking is in Australia and they're metric down-under, so close enough to 3/8" with metric thread pitch.

    As for using 3/16" on the larger barbs, just heat tubing up and add a drop of oil to it....slips right on and no need for clamps as well. You pretty much need a razor knife to remove it however.
     
  20. KCvale

    KCvale Active Member

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    I thought I took a pic of two Grubee carbs side by side but can't find it. One had SPEED on the throttle body, the other didn't. Not only were the jets different, the fuel line inputs were different sizes.
    The Speed carb was the same size as the tank petcock, the other however was much larger.

    I opt for the heavy duty larger diameter auto gas line and if it is too big I find just slipping the clear plastic gas line on, cut it off level with the fitting, then put the fatter gas line over it works fine.

    One side note...
    Regardless of what size black automotive gas line you use, a little spray from the old original pump style ArmourAll on in will help it last a lot longer.

    Also note that auto and hardware stores sell all kinds of black tubing like windshield wiper fluid and vacuum line. Gas will eat right threw those hoses. Make sure it is real gasoline line!
    Expect to to pay 80 cents to a buck a foot for it too. If it is 25 cent/ft hose, it is not gasoline hose.

    Just my 2 cents too, and I agree that humor is a little used free commodity sometimes, especially in a bad economy. I on the other hand like to use it whenever possible to the point that I don't have wrinkles on my face, I just have really pronounced laugh lines ;-}
     

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