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Thread: woot! new carb installed

  1. #1
    Join Date
    Jul 2003
    Location
    Las Vegas, NV
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    124

    woot! new carb installed

    finally got my Keihin PE38 (DG kit for the trx250r) installed on my 82 250arrr (with a 300cc kit), used the moose larger intake for the trx250r, also swaped the reeds with some boysen super stock fiber reeds.

    runs OK the way it is, I still have some jetting to do, it has a 160 main in it now, pretty sure it's too lean.

    this has probably been beaten to death here before, but has anyone noticed power differences with different reeds? the stock were steel, I got the super stock reeds because they were cheap (like me), do the carbon fiber reeds have any advantage? I also noticed they had power reeds, which seem to be 2 stage, would it be worth putting those in? How long do reeds generally last?

    Other thing is, my old carb's manifold cracked, Im guessing due to age, and possibly the weight of the carb hanging off of it. Should I make a mount to stabilize my new carb so it does not have added stress to the manifold?

    But other than that, it looks good on there, not really sure why the new manifold is off set, Im gussing to clear something, even with the offset is still leaves me with more than enough room for the air cleaner.
    F.U.2 RACING

    Atc90, bandito frame
    Atc185 x2
    82 250 (300 kit)
    83 250R
    200ES Big red
    Atc200X (with lifan motor)

  2. #2
    hazard's Avatar
    hazard is offline At The Back Of The Pack Arm chair racerFirst time rider
    Join Date
    Mar 2007
    Location
    Iowa
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    162
    well if your the maifold between your carb and engine intake, thats why you are running lean i would say, i would get a new intake manifold. correct me if im wrong
    Thanks,
    Adam
    ______________________
    1985 ATC350X
    -86 engine and plastics, DG rcm full exhaust, DG grabbar, Moose Carbon Bar, Moose bark busters, UNI air filter, Regina chain, ECA rear brake caliper, 22x11x9 Maxxis Razr 2 tires
    1984 ATC250R
    -Project trike, needs top end rebuilt


  3. #3
    Join Date
    Jul 2003
    Location
    Las Vegas, NV
    --
    124
    Quote Originally Posted by hazard
    well if your the maifold between your carb and engine intake, thats why you are running lean i would say, i would get a new intake manifold. correct me if im wrong

    I just re read my post, I was not clear on that, I got a brand new moose racing manifold to replace my old one that was cracked.
    F.U.2 RACING

    Atc90, bandito frame
    Atc185 x2
    82 250 (300 kit)
    83 250R
    200ES Big red
    Atc200X (with lifan motor)

  4. #4
    robb is offline New to the board Arm chair racerNew to the board
    Join Date
    Sep 2006
    Location
    bc canada
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    63
    i just put a 34mm carb on my 81 r had to cram the carb on the boot. i also have the two stage boyessen reeds,and reed spacer. i personally couldnt notice the difference from the stock metal ones. but maybe as soon as the parts come for my new carb. because that 28mm carb the bike comes with is way to restrictive i think.

    i just wanted to know what you did for your air filter,and old air box. i was going to leave my airbox out and just attach a uni filter the the carb?

  5. #5
    Join Date
    Jul 2003
    Location
    Las Vegas, NV
    --
    124
    Quote Originally Posted by robb
    i just put a 34mm carb on my 81 r had to cram the carb on the boot. i also have the two stage boyessen reeds,and reed spacer. i personally couldnt notice the difference from the stock metal ones. but maybe as soon as the parts come for my new carb. because that 28mm carb the bike comes with is way to restrictive i think.

    i just wanted to know what you did for your air filter,and old air box. i was going to leave my airbox out and just attach a uni filter the the carb?

    I got a K&N today, it's 5" long with a offset bend, it's a bit tight in there but does fit. I'll try to get some pics this week.

    pretty much if you need a aircleaner, just find a parts unlimited dealer and have them look it up, all you need is the size of the carb body where it clamps, how long you want it, OD, and of you want a offset, retail is about 40 bucks for them
    F.U.2 RACING

    Atc90, bandito frame
    Atc185 x2
    82 250 (300 kit)
    83 250R
    200ES Big red
    Atc200X (with lifan motor)

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