TTR 230 CC's and TTR 225 CC's Direrence
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  1. #1
    Senior Member ronnydog's Avatar
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    Is there anyone who could tell me where the TTR230 gets the extra 5cc's over the TTR225. I have a complete TTR225 motor and (excuding carb) a almost complete TW200 motor and want to make a 6 speed, TW230 by combining both motors.



    Ronnydog

  2. #2
    Senior Member lizrdbrth's Avatar
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    Marketing.



    Both are 70 x 58, near as I can tell.



    I can explain it to you, but I can't understand it for you.

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    Senior Member abyssdncr's Avatar
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    Double tap...
    2006 TW200, LED tail & turn signals, Clarke XT350 tank, hybrid YZ80 forks, CycleRacks rear rack, Ricochet bash plate, TTR225 header, eBay pegs, MSR high ATV bars, Tusk bar risers, Tusk handguards & deflectors, Tusk KX250 stainless brake line, XT225 speedo cable, 14/47 sprockets, Mule-pin seat latches, 130 main, 0.035" shimmed needle, TW34/M6006 meats.

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  5. #4
    Senior Member abyssdncr's Avatar
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    Quote Originally Posted by lizrdbrth View Post
    Marketing.



    Both are 70 x 58, near as I can tell.


    Indeed, both are actually 223 cc:



    http://www.bikez.com/motorcycles/yam...-r230_2009.php



    http://www.bikez.com/motorcycles/yam...r_225_2005.php







    Bore it 1mm over and you get 229.63 cc...
    2006 TW200, LED tail & turn signals, Clarke XT350 tank, hybrid YZ80 forks, CycleRacks rear rack, Ricochet bash plate, TTR225 header, eBay pegs, MSR high ATV bars, Tusk bar risers, Tusk handguards & deflectors, Tusk KX250 stainless brake line, XT225 speedo cable, 14/47 sprockets, Mule-pin seat latches, 130 main, 0.035" shimmed needle, TW34/M6006 meats.

  6. #5
    Senior Member lizrdbrth's Avatar
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    Quote Originally Posted by abyssdncr View Post
    Indeed, both are actually 223 cc:



    http://www.bikez.com/motorcycles/yam...-r230_2009.php



    http://www.bikez.com/motorcycles/yam...r_225_2005.php







    Bore it 1mm over and you get 229.63 cc...




    Which Yamaha did and they called it a 250. Go figger. It came in the Timberwolf/Beartracker.



    Reminds me of the movie "Spinal Tap"..... ""Mine goes to 11."



    Hadda be there. Old guy thing by now.



    I can explain it to you, but I can't understand it for you.

    Powdercoated '87 frame, extended swingarm, YZ fork legs, ATV tire, 14/55, XT350 tank, spliced quick-release seat, disc brake conversion, beeg headlight, beeger rack, Lizrdcooler, Lizrdventz and bunch of other stuff all covered in invisible ink.

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  7. #6
    Senior Member ronnydog's Avatar
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    Quote Originally Posted by lizrdbrth View Post
    Which Yamaha did and they called it a 250. Go figger. It came in the Timberwolf/Beartracker.



    Reminds me of the movie "Spinal Tap"..... ""Mine goes to 11."



    Hadda be there. Old guy thing by now.


    I talked to a factory rep and he said the 5cc is in the higher comp in the 230?



    Ronnydog

  8. #7
    Senior Member lizrdbrth's Avatar
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    Quote Originally Posted by ronnydog View Post
    I talked to a factory rep and he said the 5cc is in the higher comp in the 230?



    Ronnydog


    Higher compression would usually mean either LESS chamber volume, thinner gaskets, a domed piston, or a bore increase without changing the chamber volume. Doesn't make a lot of sense that they would increase it, but it would be interesting to know if there is a difference in the heads other than the spigots, since the valves seem to be the same. Practically hugging one another,no?



    All I gots is TW heads. I don't know. Normally combustion chamber volume isn't added to the published displacement of a motor, but maybe Yamaha is in fact doing the "Spinal Tap" thing.



    For those of you who aren't old enough to get the reference:



    http://www.youtube.com/watch?v=hN5SCRvhMtk



    Spinal Tap was a spoof film about a fictitious rock and roll band. Some of us old farts actually found this entertaining at the time. Go figger.



    I can explain it to you, but I can't understand it for you.

    Powdercoated '87 frame, extended swingarm, YZ fork legs, ATV tire, 14/55, XT350 tank, spliced quick-release seat, disc brake conversion, beeg headlight, beeger rack, Lizrdcooler, Lizrdventz and bunch of other stuff all covered in invisible ink.

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  9. #8
    Senior Member uktw125's Avatar
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    Quote Originally Posted by ronnydog View Post
    I talked to a factory rep and he said the 5cc is in the higher comp in the 230?



    Ronnydog


    Your factory rep. has some funny ideas. My TTR230 cylinder has 223cc cast into the barrel and the Yamaha web site lists the TTr230 as 223cc.



    http://www.yamaha-motor.com/sport/pr...4/0/specs.aspx

  10. #9
    Senior Member ronnydog's Avatar
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    Quote Originally Posted by uktw125 View Post
    Your factory rep. has some funny ideas. My TTR230 cylinder has 223cc cast into the barrel and the Yamaha web site lists the TTr230 as 223cc.



    http://www.yamaha-motor.com/sport/pr...4/0/specs.aspx


    So what is the dif in your 230 and the 225 in cc's?

  11. #10
    Senior Member uktw125's Avatar
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    Quote Originally Posted by ronnydog View Post
    So what is the dif in your 230 and the 225 in cc's?
    There is no difference, as said before it's a marketing thing.

    TTR225 and TTR230 are both 223cc and both 9.5-1 comp. ratio. I think they may have different carbs, if this is a big enough change for Yamaha to consider it a new model I don't know.

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