Ttr125l playbike build

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Ttr125l playbike build

This is a discussion on Ttr125l playbike build within the Bigger Minis Forum forums, part of the General Talk category; Hey guys just saying what's up and showing you all my playbike this is an evolving thread trying to innovate the TTR a little bit ...

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Thread: Ttr125l playbike build

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    greenducky55's Avatar

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    Ttr125l playbike build

    Hey guys just saying what's up and showing you all my playbike this is an evolving thread trying to innovate the TTR a little bit and help others out.
    About me im a respiratory therapist, my mechanical knowledge has come from self learning between shop manual/ write ups and just tearing things apart and trying to make them new again. ive been inside and out this motor 5 times now so hopefully some of my tricks ive picked up can help others.

    2001 TTR125L
    Engine: (forever evolving haha)
    Weisco hi comp piston stock bore
    Hotcams Stage 1 cam
    BBR old style exhaust
    YZ80 carb with uni pod
    BBR rev box

    Suspension:
    2001 YZ80 forks
    -race tech gold valve
    -.38 Cannon race craft fork springs
    2009 TTR 125le shock
    -Fast 50's shock spring
    -race tech gold valve
    -Electric start conversion

    Misc:
    Bbr frame cradle
    bbr chain guide
    2009 ttr125le rear hub
    prowheel pitbike rim and spoke set
    yz80 front brake
    Renthal CRF150 adult bend bars
    senge graphics

    Future:
    -4 valve head (in progress)
    -232cc big bore (in progress)
    -Powdercoated frame
    -Anodized parts
    -Wave front rotor
    -Rear disc brake in stock swinger
    -New graphics
    -Antigravity 4 cell

    Some pics:
    Click image for larger version. 

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    Last edited by greenducky55; 11-21-2015 at 10:48 AM. Reason: Updated specs and about me

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    greenducky55's Avatar

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    Click image for larger version. 

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    Got some in action pics from a while back. On the home pc

  3. #3
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    Jarret53's Avatar

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    Defiantly one of the nicest TTR125s I've seen

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    keshon's Avatar

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    Very nice, I need to do something with mine

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    Thanks guys it's still a work in progress. May have to bump up the spring rates in the forks or stiffen up the valving some more it's kind of a trial and error. Still need to shave the flywheel of some weight. Overall its still fun to go play around but I just want a little more out of her. Debating after she's done buying an x5 to be a little more serious with

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    you wouldnt by chance have the stock 2001 rear spokes you would like to sell? I broke half of the spoke out of mine and i dont really want to play 50 bucks to get new spokes.

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    No I actually got rid of my stock spokes when I changed rims as they won't work for me anymore.

    have a new vid of me playing on the ttr starts at about 4 minutes

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    some action pice i promised
    Click image for larger version. 

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    Long time no post. Just had the motor torn apart again for a broken counter shaft. So now im adding a few little upgrades to it.
    Bought an electric start harness, bottom end with bad crank, e start motor ect, basically everything to make the bike electric start since kick starting it i killing counter shafts and kicker gears.
    Also added, Adult bend bars, bar risers, BBR shfter, YZ80 carb, uni pod filter, tall seat foam, gripper cover, Added a LE aluminum swingarm probably missing a few things but it is what it is. slowly ticking off everything i want in this bike. next step is making the motor crazy! just need the $$

    Bike prior to this tear down and after replacing counter shaft Painted the frame black as well
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    Heres what the last counter shaft left as carnage as well
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    Internals of both motors
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    Bottom end assembled
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    Waiting on a fe more part to come in and ill have it filly assembled

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    So got the motor all rebuilt. Still burning alot of oil even with new seals and a good ring gap. Thinking may just be time for an overbore. It may just be time to to build a 4valve motor I think I've researched enough now to go for it.

    A few tips for those of you that want to convert to e start. And are too stubborn like myself to just buy a bike that already has it.

    Make sure if you buy a used harness it comes with all of the safety switches and the ignition key. Otherwise you will have some homework to do to bypass them or spending a lot of $$ on all the sensors.

    You only need the left side case from a e start model
    Your stock front motor mount will need to be trimmed to clear the starter.
    You will have to weld on the battery box mounts as they won't be on your frame. (This may not be true on 03 and newer models my 01 did not have them)
    Otherwise it's really simple

    Does anyone have any other ideas on why I may Still be burning oil like crazy? Rings are properly aligned, new valve seals. New gaskets. All Dowell pins in place. Compression is low and timing is correct so I am suspecting worn cylinder. Piston has low hours with brand new rings.

    Stay tuned I may just say screw it and go for the 145cc motor with 4valve head

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    I vote screw it, get the 4 valve.

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    I am doing a TTR125 build and I would be curious how you get a 4 valve head to fit/ which model head it would be! great thread so far
    -ALEX MONTEER #423 Hidden Content

    My Bikes
    DIRT:
    2013 yz450F (built race bike)
    2011 Yz450F (practice bike)
    2008 Yz250F (full mod)
    2005 TTR125 (moded yz85 conversion Gf's bike)
    2015 ssr160tx (lots of upgrades coming)

    Street:
    2009 DRZ400SM (full mod)
    2007 SDG 140cc

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    I don't want to say for sure that the head fits but I bought a Zuma 125 head. There is 2 places that currently sell a 4valve kit for the raptor 125 which is the identical motor to the ttr125.
    Firepower minis when I emailed them their price was $800 stock bore
    Precision Motorworx they have a variety of stuff. Aluminum sleeve kit 13:1 piston kit. And the 4 valve head.
    I picked a head based off of the photos they have and searched Yamaha 125 head and compaired pictures. Well see if I got it right. So far the gaskets line up. Still a lot more homework to do. I think Firepower minis is spot on on their price. I'll get a parts list and price list going once I figure it out.

    PMW does amazing work though and have tested it like crazy in gncc racing. They are on top of their game.

    This won't be a direct bolt on mainly because I have not found a 4valve piston the right size to stay stock. So we shall see what happens. I'll keep everyone updated.
    Last edited by greenducky55; 01-11-2015 at 08:48 PM.

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    Quote Originally Posted by greenducky55 View Post
    I don't want to say for sure that the head fits but I bought a Zuma 125 head. There is 2 places that currently sell a 4valve kit for the raptor 125 which is the identical motor to the ttr125.
    Firepower minis when I emailed them their price was $800 stock bore
    Precision Motorworx they have a variety of stuff. Aluminum sleeve kit 13:1 piston kit. And the 4 valve head.
    I picked a head based off of the photos they have and searched Yamaha 125 head and compaired pictures. Well see if I got it right. So far the gaskets line up. Still a lot more homework to do. I think Firepower minis is spot on on their price. I'll get a parts list and price list going once I figure it out.

    PMW does amazing work though and have tested it like crazy in gncc racing. They are on top of their game.

    This won't be a direct bolt on mainly because I have not found a 4valve piston the right size to stay stock. So we shall see what happens. I'll keep everyone updated.
    Definately keep us updated on how that 4 valve head turns out and the cost for it. I have thought up building up a ttr125/yz85 "big mini" because my friend well sell me his complete bone stock ttr125 for $200 so I could build it for cheap, but the lack of motor mods is what has kept me from doing this project. (Before reading this thread I thought the only mods available were the BBR 150cc bore kit and cam which doesn't seem to make that much of an improvement from the reviews I have read). A 4 valve head plus the bbr 150cc bore kit could have some potential...

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    Well I ordered what I believe should be the parts needed for the 4 valve build. Along with extras as well. I'm sure there will be more things to be done. Just don't imagine this being a bolt and go job. I'm sure there will be some machine work involved. Will continue updating as thing arrive. Crossing my fingers this all works.

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