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Thread: Its done and running!!!

  1. #1
    Senior Member vanillagorilla1's Avatar
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    Its done and running!!!

    Well been plugging away on this for 7 months or so, but I finally buckled down and wrapped it up. I have some tuning to do I imagine and need to chill for a while till its got a few miles on it, but she runs like a top. Im hoping the gearing is a good choice, but I suppose I will get that worked out as well. it is 15-50 now and seems great so far in the first 5 miles I drove it this morning. So here goes. By the way I cant tell how much lower it is for sure yet (read below), but 6th is a fair bit taller gear.

    this is a video and should be clickable.

    Untitled by dolphaxel, on Flickr
    https://flic.kr/p/vvcdJs

    I meant to get some base numbers but forgot. So if anyone has a stock bike as far as motor and gearing with a tach I would like a few numbers to compare. Something like this
    [email protected]
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    What im after is how close am I to the stock 1st and how much drop do I have on the top end. Thanks
    Last edited by vanillagorilla1; 07-09-2015 at 09:26 AM.
    TW-Brian and Hidebound like this.
    93 tw. running like clockwork
    225 6 speed complete!
    82 honda gl500 silver wing. sold to a new home 11-24-17
    03 ducati monster 800sie. full rebuild and a danger to the public Hidden Content for sale

  2. #2
    Senior Member TW-Brian's Avatar
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    Congratulations Vanilla!

    Refresh my memory please, what are the mods that you made to your engine?

    Brian

  3. #3
    Senior Member Fred's Avatar
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    Can't you just look at the factory specs for gear ratios in each gear, factor in sprockets and tire diameters of course, to get your answer empirically? Simple math.
    2003 TW200 "Betty Boop"
    2006 TW200 "Nibbler", a.k.a. “Mr.Gizmo"
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  5. #4
    Senior Member vanillagorilla1's Avatar
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    Quote Originally Posted by TW-Brian View Post
    Congratulations Vanilla!

    Refresh my memory please, what are the mods that you made to your engine?

    Brian
    Brian, its a 2001 ttr225 motor. So it should have the wider 6 speed. in addition to the gained bore and stroke I did the high compression piston. It also has an oil cooler bolted on. I think thats it for the big stuff, but I did do a new con rod, big end bearing, valves, springs, seals, hardware, ect. should be a solid ugly duckling.

    Quote Originally Posted by Fred View Post
    Can't you just look at the factory specs for gear ratios in each gear, factor in sprockets and tire diameters of course, to get your answer empirically? Simple math.
    thanks fred, Ive done the math thing and think I know whats what, but I wanted a little back up to be sure I did all the math right.
    93 tw. running like clockwork
    225 6 speed complete!
    82 honda gl500 silver wing. sold to a new home 11-24-17
    03 ducati monster 800sie. full rebuild and a danger to the public Hidden Content for sale

  6. #5
    Senior Member TW-Brian's Avatar
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    Quote Originally Posted by vanillagorilla1 View Post
    Brian, its a 2001 ttr225 motor. So it should have the wider 6 speed. in addition to the gained bore and stroke I did the high compression piston. It also has an oil cooler bolted on. I think thats it for the big stuff, but I did do a new con rod, big end bearing, valves, springs, seals, hardware, ect. should be a solid ugly duckling.
    Cool!

    I am still a few weekends from (hopefully) firing up my TW226 6-speed project. I'll be interested to hear how yours performs.

    Are you using a TW or TTR carb?

  7. #6
    Senior Member vanillagorilla1's Avatar
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    Im just using the tw carb. I have the old style carb which I think I remember hearing someplace that was the easier one to tune, but I could be imagining things. when I ran it this morningit actually seemed to have better pick up than my 200 which seems odd because it was tuned to the 200, but what ever. I gotta say first impression is that its gonna be awesome!
    mrgoodsmith likes this.
    93 tw. running like clockwork
    225 6 speed complete!
    82 honda gl500 silver wing. sold to a new home 11-24-17
    03 ducati monster 800sie. full rebuild and a danger to the public Hidden Content for sale

  8. #7
    Senior Member RockyTFS's Avatar
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    Quote Originally Posted by vanillagorilla1 View Post
    .....
    What im after is how close am I to the stock 1st and how much drop do I have on the top end. Thanks
    This should answer your questions:
    Gearing Commander: Motorcycle Speed and Drive Train Calculator (Online and Stand alone)
    Fred likes this.
    Rocky
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  9. #8
    Senior Member jtomelliott49's Avatar
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    I totally love the upgrade you, TWBrian, and others have done to the lowly TW. Has anyone done a 250cc upgrade?
    Tom in Wichita

    78 Moto Guzzi SP1000
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  10. #9
    Senior Member TW-Brian's Avatar
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    Quote Originally Posted by jtomelliott49 View Post
    I totally love the upgrade you, TWBrian, and others have done to the lowly TW. Has anyone done a 250cc upgrade?
    Checkout what macbig2k1 has done:

    https://tw200forum.com/forum/performa...tml#post199128

  11. #10
    Senior Member lbxr's Avatar
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    I am thinking that you may not need to add any more fuel than an already richened up 200 uses...Also I doubt that the early carb is easier to tune than the later cv carb. Perhaps the main reason Yamaha went to the cv carb is because it is much more tolerant of lean settings....you can not just yank the cv carb wide open right off idle like you can with the early carb. Well you can, but the slide will open at its own pace...slowly to avoid stalling. For this reason I think the cv carb is probably easier to tune as abrupt throttle openings are buffered. I do think the early carb makes more power down low and pulls harder right off idle. I much prefer the early carb for off road, but I have no issues with the cv carb for the most part, but given a choice I do prefer the early carb...
    littletommy and Kf6rqb like this.

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