Carb Swap and Comparison
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Thread: Carb Swap and Comparison

  1. #1
    Senior Member ronnydog's Avatar
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    I am removing my 1996 carb (old carb) and installing a 2006 carb (new carb). Some of the things I learned on the swap is the intake manifolds are different, the intake boot to the air box is different including clamps, so I had to come up with some newer parts. Thanks Jimbo! After installing the carb I turned on the gas and the float bowl gasket leaked, remove and replace, turn the gas on and gas was coming out of the air box, remove carb and replace the needle valve seat and the float needle valve ooooooook reinstall the new carb turned on the gas and.............no leak! Install cables, hoses, turn on the key and it started, ck for leaks all looks good. I putted around my street just to make sure all was ok. I plan on ridding this weekend to compare all around performance.



    The new carb on the left, note the larger intake that goes to the air box boot.







    The air boot for the new carb is on the bottom, much larger diamiter.







    The intake side of the cards. New carb on the left, the groove is dif.


  2. #2
    Senior Member ronnydog's Avatar
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    This is the old card and you can see the opening through the carb is oval.







    The new card is round looking through it.




  3. #3
    Senior Member small's's Avatar
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    Do you notice any difference in performance?

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  5. #4
    Senior Member jbfla's Avatar
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    Good info, Ronniedog.



    I worked with MXRider converting his old carb to a new one. His old carb had broken float posts, so the decision was easy.



















    He couldn't compare performance since his bike with the old carb was not in running condition.



    jb
    2018 Triumph Street Twin..............2016 CB500F
    2014 XT250 ..................................2008 H-D Softail Deluxe
    2008 SV 650..................................2007 DR 650..

  6. #5
    Senior Member Bagger's Avatar
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    Nice RD, thank you for the info! I still have to get into my carb, as D's bike flat outruns mine, and they are twins . . . and NO, I'm not that "well fed".



    I can't wait to hear what you think.



    Bag
    "The TW may be slow, but the Earth is patient" - MK

    "If I'm wrong, and it turns out that you hate it, I'll send you all my Barry Manilow albums." LB

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  7. #6
    Senior Member ronnydog's Avatar
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    JB thanks nice pics, I wish I saw these before I started the project!



    Ronnydog

  8. #7
    Senior Member ronnydog's Avatar
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    Quote Originally Posted by Bagger View Post
    Nice RD, thank you for the info! I still have to get into my carb, as D's bike flat outruns mine, and they are twins . . . and NO, I'm not that "well fed".



    I can't wait to hear what you think.



    Bag




    Bag I have had the same thing happen with bikes newer than 2001 (JIMBOS Bike ) and I thought this might be the answer. Hell if all else fails build a TW250 I know that works. Did you shim your clutch?

    Ronnydog

  9. #8
    Senior Member small's's Avatar
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    I did a test with my two t-dubs! My 98 feels like it has way more low end torque than the 07 so i had my buddy who is about 190lbs ride my 98 and i rode the 07 150lbs from a 35-40mph roll in 5th no down shifting. He out ran me by probably three bikes to about 65mph. But the 07 runs about 5-7mph faster on top speed.

  10. #9
    Senior Member ronnydog's Avatar
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    Quote Originally Posted by Small's View Post
    I did a test with my two t-dubs! My 98 feels like it has way more low end torque than the 07 so i had my buddy who is about 190lbs ride my 98 and i rode the 07 150lbs from a 35-40mph roll in 5th no down shifting. He out ran me by probably three bikes to about 65mph. But the 07 runs about 5-7mph faster on top speed.




    Smalls I like the new carb better, (I ran a 128 main and one shim) the bike runs smoother, more predictable, comes on a little slower and the top speed is 5-7 mph faster. It has a little more get up from mid to full. It has more power overall. The test is on my 226cc with 15/44 sprockets. I'm going to run some street and offroad with the Bighorn and 15/55 sprockets today.



    Ronnydog

  11. #10
    Senior Member small's's Avatar
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    I feel the same way. I like riding the 98 in the woods around here because of the better low end but thats about it. Im really thinking about putting a bighorn/ k760 on the 98 and maybe a 54-57 rear sprocket for toying around here. Did you run that 15/44 on the ss1000 and is it ok on the slab? Im thinking about running a 15/47 for a road only trip to the blue ridge parkway. Im guessing 1500+plus miles. The 14/47 pulls my 150lb butt around with ease and it feels like it would be fine on the road. I guess it would be worth $20 and a little testing to find out.

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