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Thread: The all new Big Red 250es / 250sx 350cc big bore kits are in stock.

  1. 04-17-2015, 04:45 PM #1
    Mickey Dunlap's Avatar
    Mickey Dunlap
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    The all new Big Red 250es / 250sx 350cc big bore kits are in stock.

    The all new Big Red 250es / 250sx 350cc big bore kits are in stock.

    $335

    This is a 88mm 11:1 piston that will come with a sleeve and head gasket. Just re-sleeve you cylinder and let her rip! We have a new bigger cam but I'm going to wait on selling the stage 2 cam until I get in my bike, for now we have our stage 1's that will work fine for most trail riders.

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  2. 04-17-2015, 05:58 PM #2
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    jeffatc250r
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    How much of a power increase does this yield?
    Any need to run an oil cooler?

    Im def interested, but curious how much more it actually makes

    Would def be nice to not be stuck in 2nd or 3rd on the bigger hills on the trails
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  3. 04-17-2015, 06:41 PM #3
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    Quote Originally Posted by jeffatc250r View Post
    How much of a power increase does this yield?
    Any need to run an oil cooler?

    Im def interested, but curious how much more it actually makes

    Would def be nice to not be stuck in 2nd or 3rd on the bigger hills on the trails
    I'm going to dyno my stock Big Red 250 and a 85' 200x stock before I put the kit in so I will be able to give you all the answers. IMO all the air cooled bikes need the oil cooler kits.

    Just as a est. 100cc should give it 10hp by it's self and the stage 1 cam around 3 more hp. Stage 2 cam and ported head should give a strong 20hp more with a 400ex carb. So IMO est. should over double the hp the way I'm going to build mine.
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  4. 04-17-2015, 06:48 PM #4
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    How long is the wait for the 350x kits?!!!
    85 350X
    86 200x

    My feedback:

    http://www.3wheelerworld.com/showthr...dback+devilman
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  5. 04-17-2015, 08:26 PM #5
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    What oil cooler setup is used? A universal or does something from a trx work?
    Will the stock carb work with heavier jetting or is a ex carb needed?
    Also will the stock valves and exhaust work or too restrictive?
    Could def use more grunt in the ole sped, but want to keep stock exhaust and carb if possible
    I like her quiet and stealthy
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  6. 04-17-2015, 08:57 PM #6
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    Quote Originally Posted by devilman View Post
    How long is the wait for the 350x kits?!!!
    This. I volunteer my 350x as a tester unit...
    85 Kawasaki KLT 160
    85 Kawasaki KLT 110
    82 ATC 70
    2000 Scrambler 500
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  7. 04-17-2015, 10:36 PM #7
    TheRealFatShady
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    Will these kits work in a trx300 engine? 2wd, shaft driven model
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  8. 04-17-2015, 10:41 PM #8
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    Mickey, did you say it will work in a 85 200X motor, And if so what Is the cc's
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  9. 04-17-2015, 10:54 PM #9
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    Quote Originally Posted by devilman View Post
    How long is the wait for the 350x kits?!!!

    I can only do so much. Between fenders and this time of the year I' slammed.
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  10. 04-17-2015, 10:57 PM #10
    Mickey Dunlap's Avatar
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    Quote Originally Posted by jeffatc250r View Post
    What oil cooler setup is used? A universal or does something from a trx work?
    Will the stock carb work with heavier jetting or is a ex carb needed?
    Also will the stock valves and exhaust work or too restrictive?
    Could def use more grunt in the ole sped, but want to keep stock exhaust and carb if possible
    I like her quiet and stealthy
    I have cooler kits, same as a 300ex.

    I'm going to run mine with stock carb and pipe first, then change to head work and carb.
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  11. 04-17-2015, 10:59 PM #11
    Mickey Dunlap's Avatar
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    Quote Originally Posted by Keith Salyer View Post
    Mickey, did you say it will work in a 85 200X motor, And if so what Is the cc's
    No, I'm dynoing them at the same time, then the 200x will get dynoed with my piston and stage 3 cam. I have also moded a DG pipe and a 30mm carb kit.
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  12. 04-19-2015, 02:07 PM #12
    Beau
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    with 11:1 can you still run pump gas?
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  13. 04-19-2015, 02:10 PM #13
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    Quote Originally Posted by Beau View Post
    with 11:1 can you still run pump gas?
    With the cams I have, other wise just tell me you are not putting a cam in and I will lower the compression.
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  14. 04-19-2015, 03:18 PM #14
    Beau
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    Quote Originally Posted by Mickey Dunlap View Post
    With the cams I have, other wise just tell me you are not putting a cam in and I will lower the compression.
    will the cam not work with a lower compression piston?
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  15. 04-19-2015, 03:33 PM #15
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    Quote Originally Posted by Beau View Post
    will the cam not work with a lower compression piston?
    The stage 1 would work with 10.5:1, but the stage 2 will need the 11:1.
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