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Thread: Jetting LRD 300R??

  1. #1
    Join Date
    Aug 2002
    Location
    Bristol, TN
    Posts
    146

    Question Jetting LRD 300R??

    I just picked up a LRD 300 big bore for my 250R. Can someone put me in the ball park on the jetting. Here are my mods:

    LRD 300 big bore on 89 engine
    ESR TR6 pipe/silencer
    Rad Valve with spacer
    36mm TMX carb
    Stock Air box, foam filter, with lid on.

    TIA Mike

  2. #2
    Join Date
    Sep 2002
    Location
    Fort Myers/Florida
    Posts
    607
    Best thing to do is call LRD and ask them where to start.
    503-885-9200.
    1986 TRX250R Trail Bike
    1989 Drag Bike

  3. #3
    Join Date
    Aug 2002
    Location
    Bristol, TN
    Posts
    146
    I called earlier today and talked to some guy (Not Arlan). He said that LRD doesn't use TMX carbs and they don't have jetting specs for them Surely someone is running a setup close to this

  4. #4
    Join Date
    Sep 2002
    Location
    Fort Myers/Florida
    Posts
    607
    You can try ESR, maybe they can help you out. They sell the TMX carb.

    Eddie Sander Racing
    1510 E. Main St. Unit C
    Visalia,CA 93292
    Phone: (559) 625-3157
    Fax: (559) 625-5356

    http://www.paragondesigns.com/esr250...sp?CatalogID=2
    1986 TRX250R Trail Bike
    1989 Drag Bike

  5. #5
    Join Date
    Aug 2002
    Location
    Bristol, TN
    Posts
    146
    I called ESR and they told me that my jetting should not change!! If it did it would only be 1 size larger on the main

    Does this sound right?? I am going from a stock, unported cylinder to a fully ported 300!

  6. #6
    Join Date
    Aug 2001
    Location
    mich
    Posts
    272
    2 sizes larger on the main, do plug chops at various throttle positions...
    The toy box;
    85 ATC250R
    87 TRX350RPV
    88 TRX250R
    01 TRX400EX
    95 Scrambler 400
    97 Explorer 500
    03 TLD Predator
    04 Predator- Dale Earnhardt Jr. LE
    05 Sportsman 800EFI
    05 Predator 500 Limited Edition
    01 ZR800LE for the white stuff

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