2009 TTR125 build

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2009 TTR125 build

This is a discussion on 2009 TTR125 build within the Bigger Minis Forum forums, part of the General Talk category; Picked up a 2009 ttr125 that was blowing blue really bad, turns out it was bored too big for the new piston. So i just ...

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    2009 TTR125 build

    Picked up a 2009 ttr125 that was blowing blue really bad, turns out it was bored too big for the new piston. So i just tossed a BBR 150 kit in it. Along with picking up a yz85 and using the forks.
    have a 17.5 pilot and 110 main but was bogging so i put in a 117.5 and it was better but theres still a big bog on the top end even after playing with the mixture screw. cleaned up the yz85 carb and tossed it on just to see what it would do. Bike runs way better instant power and revs way quicker.

    should I try and jet the stock carb better or jet the 85 carb ? or just buy a yz80 mikuni round slide?

    still undecided about the swing arm swap. it seems worth it because a spring for the yz shock is cheaper than a spring and chain guide for the ttr plus you get the disk of course.

    going to be getting the flywheel machined in the next week or so and hopefully get the carb issues sorted out.

    and what spings are people running in thier 85 forks im 195 lbs.

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    Made some progress on the bike over the last little while. still waiting on a bunch of parts

    bought a yz80 carb and very impressed with the power going to maybe jet it this weekend if my parts are in. if anyone has any jetting they are running that would be great i bought 150 - 190 mains and 17- 25 pilots so hopefully one of those combos will work.
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    welded up linkage mount , rear master (should practice before just laying a bead ) cut and welded frame for shock to fit .Still undecided about buying a bbr cradle or welding the frame solid $199 just seems pretty expensive.
    Ordered .41 springs for the front and 6.8 for the rear. mounted up the yz85 foot pegs they work great and lengthened the brake pedal and added some more teeth to it aswell

    due to the exhaust hitting the resevoir on the shock i am just going to cut it and turn the pipe and reweld it all and put a pitbike muffler on off ebay to keep things cheap till i decide to pull the trigger on a new system.


    Having a tough time with uploading pictures that arnt sidways so ill just wait till i get my parts and hopefully get some more done this weekend
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    Last edited by jliv325; 01-25-2017 at 11:48 PM.
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    Keep us updated!!

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    Are there other options besides welding or the BBR cradle?
    SR160-TX
    P190R
    TTR125LEL
    CB400F (75)

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    Quote Originally Posted by T-Wrecks Racing View Post
    Are there other options besides welding or the BBR cradle?
    I built one out of steel years ago but it did require welding but was still removable. I had a thread on here called "ttr125 build yamasaki" (I think lol) and it has a few pics of the material i used and what it looked like finished

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    Awesome! You're doing exactly what I did with mine (mine's even an '09 as well). Some guys run the shock reservoir on the right side and just run a pod filter, but I wanted to keep the stock airbox and battery setup, so ended up having to cut and re-route my exhaust, too.

    FYI, the new style (15 and up) YZ front fender and numberplate will fit, and give it a more modern look. You have to trim the rear of the f. fender to clear the head pipe.
    1973 ATC70 (restored)
    1981 C70 Passport (original)
    1972 CT70 K1 ("restored" rider)
    1977 CT70
    1978 CT70
    1974 Z50
    1993 CT70: TB117cc w/ Takegawa 5 disc clutch & close ratio 3 speed, Over Ti exhaust, G'craft Aux Tank, Kitaco Kicker
    1994 CT70: Nice 110cc engine, Hotlap Exhaust, G'craft Aux Tank, Kitaco Kicker
    09 TTR/YZ Conversion

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    Here is the thread mr.skywalker did a few years back

    Ttr125 Build (Yamasaki)

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    Nice Mr.skywalker i think if im not going the bbr route , im just going to weld the whole frame together get rid of the bolt in stuff.

    Thanks Motoman287 i definitely saw your build and love your bike thing is so clean. ya i ordered up a new fender and number plate. and im going the same route the bike is "for my gf " to learn on haha so im keeping the estart.

    really trying to keep the cost down now that i have spent most of the money i need too but does any one know a cheap way to get black wheels cant seem to find any kits or anything reasonable and my rims arnt worth powder coating.

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    cheapest i have found a rim and spoke kit is off motosport for $240 wich is just over $300 Canadian

    and one more thing what does everyone think of doing a rev box ? i heard 09 and up have a stronger kick shaft and i will mostly use e start ? is it worth the money ?
    Last edited by jliv325; 01-26-2017 at 11:47 PM.

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    As far as a rev box goes, I can't give much advice. I bought one, and honestly haven't installed/tried it yet. I read the same, that by using the e-start, you shouldn't have to worry about breaking gears.

    On the topic of wheels, this is just a random thought/suggestion, and I have no idea if it would work, or how well. I have never used the stuff myself, but that plasti-dip stuff may work? I have friends who have used it to turn parts on their Harleys black, and another who actually did his rims on a '14 Silverado. I think it'd be fairly cheap, and if you got sick of it, it'd peel right off. That being said, I don't know how well it'd hold up to abuse in the dirt...
    1973 ATC70 (restored)
    1981 C70 Passport (original)
    1972 CT70 K1 ("restored" rider)
    1977 CT70
    1978 CT70
    1974 Z50
    1993 CT70: TB117cc w/ Takegawa 5 disc clutch & close ratio 3 speed, Over Ti exhaust, G'craft Aux Tank, Kitaco Kicker
    1994 CT70: Nice 110cc engine, Hotlap Exhaust, G'craft Aux Tank, Kitaco Kicker
    09 TTR/YZ Conversion

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    put the rev box in !! haha yah the kid who owned the 85 before me sprayed the wheels black so its quite a mess other wise i would just have left them silver. o well maybe i should just order the wheels and get my hubs powder coated. My poor '16 kx450 is stock and this bike is just getting all the attention

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    installed the fork springs and 15wt oil at 100mm hieght along with new seals and the rear shock spring. suspension feels great already . bled the brakes and threw on some parts that came in. still waiting on the muffler to be able to finish the exhaust and get it jetted. still cant decide what i am doing with the frame cradle situation but other than that its getting pretty close.

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    Last edited by jliv325; 01-31-2017 at 09:46 AM.

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    Lookin' good. Just a word of caution on your pipe. If you routed the pipe outward, away from the center of the bike at all, you may want to wrap it. I tried to keep mine tucked in, but slung under the reservoir, but it still sticks out enough that I melted the crap out of my Tech 2's and pants. I bought black header wrap to cover just that section, although I haven't gotten around to installing it yet.
    1973 ATC70 (restored)
    1981 C70 Passport (original)
    1972 CT70 K1 ("restored" rider)
    1977 CT70
    1978 CT70
    1974 Z50
    1993 CT70: TB117cc w/ Takegawa 5 disc clutch & close ratio 3 speed, Over Ti exhaust, G'craft Aux Tank, Kitaco Kicker
    1994 CT70: Nice 110cc engine, Hotlap Exhaust, G'craft Aux Tank, Kitaco Kicker
    09 TTR/YZ Conversion

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    Thanks ,yah after standing up and jumping on the suspension a bit its pretty close.
    Think i will have to do some cutting and reweld it tucked in and under the reservoir.

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    Well a tube bender would have been nice but I am pretty happy with how the cradle turned out.frame should be plenty strong now.

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