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Thread: TS125 Powered Bucket

  1. #46
    Join Date
    12th February 2004 - 10:29
    Bike
    bucket FZR/MB100
    Location
    Henderson, Waitakere
    Posts
    3,896
    It's like trying to have an intelligent discussion with a piece of would

  2. #47
    Join Date
    5th January 2007 - 14:58
    Bike
    motocompo
    Location
    Buttfuck nowhere
    Posts
    5,146
    Quote Originally Posted by speedpro View Post
    It's like trying to have an intelligent discussion with a piece of would
    Quoting that in case you edit.

  3. #48
    Join Date
    1st May 2019 - 20:57
    Bike
    kr250
    Location
    alexandra
    Posts
    8
    Quote Originally Posted by TZ350 View Post
    .

    A Honda RS125 NF4 expansion chamber works well and is relativly easy to fit.

    Attachment 341632

    I have got them from this auction site, they ship internationally:- https://www.jauce.com/

    Attachment 341633 Honda RS125 NF4 pipe. The header bolts up hard to the cylinder and the main body is held to the header with springs.

    The NF4 pipes are reasonably easy to fit. Mostly they just require a new header flange to bolt them to the cylinder.

    Attachment 341634 The later model NX4 pipe is lighter, more traditional type of racing pipe and has a much steeper header. Because of the header angle it is a bit harder to fit, but some cut and tuck will sort that.

    Both pipes work well, even on a low tuned engine and work better as the tune is improved. I have successfully used these pipes on my builds from when I started at 18hp to a best ever 32 hp.

    It is an interesting phenomenon that the same tuned length has suited both 18 and 32 hp but its easy to understand when you think about the exhaust heat and how it affects the tuned length.

    The same tuned length for lower hp and lower rpm == higher hp and higher rpm.
    Hi can someone give me the specs to make the rs125 chamber thanks

  4. #49
    Join Date
    18th May 2007 - 20:23
    Bike
    RG50 and 76 Suzuki GP125 Buckets
    Location
    Auckland
    Posts
    9,964
    Quote Originally Posted by eddie View Post
    Hi can someone give me the specs to make the rs125 chamber thanks
    Click image for larger version. 

Name:	RS125R Tune-Up.pdf 
Views:	79 
Size:	388.5 KB 
ID:	341787 .................

  5. #50
    Join Date
    20th January 2010 - 14:41
    Bike
    husaberg
    Location
    The Wild Wild West
    Posts
    10,355
    Quote Originally Posted by eddie View Post
    Hi can someone give me the specs to make the rs125 chamber thanks
    there is a fair few more here as well.
    but stick with the NF4
    https://www.kiwibiker.co.nz/forums/s...post1131093900
    Quote Originally Posted by Katman View Post
    I reminder distinctly .




    Kinky is using a feather. Perverted is using the whole chicken

  6. #51
    Join Date
    1st May 2019 - 20:57
    Bike
    kr250
    Location
    alexandra
    Posts
    8
    Thanks thats been a big help , going by the parts book it has a short header pipe not included in the drawings do you have the spec for that also?
    I see in the parts book it has an air box are they an improvement on an older race engine

  7. #52
    Join Date
    17th February 2019 - 22:52
    Bike
    Gsxr250/TS125ER Bucket racer
    Location
    Nelson
    Posts
    19

    New Paint and other work during Nelson Off Season

    We had a couple of months off racing over winter so I have had some time to get a few improvements ticked off my list.

    https://scontent.fakl8-1.fna.fbcdn.n...68&oe=5DE10921

    https://scontent.fakl8-1.fna.fbcdn.n...a8&oe=5DD5F5AD

  8. #53
    Join Date
    17th February 2019 - 22:52
    Bike
    Gsxr250/TS125ER Bucket racer
    Location
    Nelson
    Posts
    19
    Quote Originally Posted by TZ350 View Post
    No.... a TF or TS is a perfectly legal Bucket engine...

    Attachment 341616

    This TF/TS 125 at 22rwhp in a NF4 chassis proved to be competitive and very reliable.
    Awesome looking bike, do you still race it?

  9. #54
    Join Date
    18th May 2007 - 20:23
    Bike
    RG50 and 76 Suzuki GP125 Buckets
    Location
    Auckland
    Posts
    9,964
    Quote Originally Posted by jthespanner View Post
    Awesome looking bike, do you still race it?
    No, not my bike. It belongs to Rick 52

  10. #55
    Join Date
    24th July 2008 - 18:01
    Bike
    Honda RS 125 1992
    Location
    Taupo
    Posts
    717
    Great bike with lots of results, very reliable with good usable power, no longer a Bucket.

  11. #56
    Join Date
    17th February 2019 - 22:52
    Bike
    Gsxr250/TS125ER Bucket racer
    Location
    Nelson
    Posts
    19

    OK So I might be getting carried away now

    Right,

    Well after building up my GSX250 frame with the TS125 engine I was a bit disappointed how much it weighed all up.

    94 kg wet according to the scales at my local Kart track.

    Time to redo this much better-er!!

    So I found on TradeMe an old RG250 Gamma alloy frame and I decided to swap as much as I can off my GSXR Chassis and build my super bucket.

    Parts purchased so far.

    RG250 Frame
    KLX300 swing arm
    RM85 complete ignition setup including flywheel and CDI
    KLX250 rear axle and chain adjusters
    KLX250 rear brake setup

    Parts I already have and will be adding to the mix
    GSXR750 Ohlins rear shock
    GSXR1100 rear suspension linkages
    GSXR250 Front Forks
    2 Sets of GSXR 250 Wheels (one with slicks fitted, others for wets)
    2 XJR1200 front brake Discs (one for each wheel set)
    GN250 Front Brake Master
    TS125 Engine


    My reasoning for using the KLX swing arm is because the TS125 engine mounts like most dirt bikes and the rear engine mount is the axle of the swing arm. I built vertical gussets on the GSXR frame and I won't be repeating that mistake 2nd time round.

    The KLX had a larger diameter swing arm axle then my TS125/GSXR had so I turned some top hat spacers to adapt the KLX swingam into the RG250 frame. Width wise the KLX swing arm is perfect!!! it's like it was destined to go into an old Gamma frame. Gotta love how Suzuki (Kawasaki KLX250 = DRZ250) keep parts and dimmensions common across many models.

    Moving onto rear wheel mounting.... The KLX has a much larger diameter axle than a GSXR250. I got the SKF bearing catalog out and tried to source a bearing to adapt GSXR wheels onto the KLX axle.... no joy the bearing I need doesn't exist/isn't common and I couldn't be bothered to strip down the rear wheel to get them machined out to make a bearing fit.

    Plan B, I cut down the KLX axle and welded a short piece to each side cam shaped chain adjuster, RH side also catches the KLX caliper hanger, LH side only catches the swingarm and is welded to its own chain adjuster. I then turned both axle adapters on the lathe to true them and ran a 16.2mm drill bit through the centre to allow a standard GSXR250 rear axle to fit through the center. Boom GSXR rear wheel on standrd size bearings in a KLX swingarm.

    I just need to center the rear wheel in the swingarm next. After some measuring I need to loose 16mm off the chain side somehow. I have purchased a FXR150 sprocket carrier as I'm hoping it will be a little narrower then a GSXR250 item. Hopefully this arrives soon and I can get the rear wheel fitted.

  12. #57
    Join Date
    17th February 2019 - 22:52
    Bike
    Gsxr250/TS125ER Bucket racer
    Location
    Nelson
    Posts
    19

    P.S. Weight's

    The GXR250 Frame, rear shock and Swingarm weighed 23.65 kg on the scales at work.

    RG250 frame, KLX 300 swingarm, Ohlins rear shock 14.21 kg

    9.44 kg down already!!!

    I still have a few other parts I made out of steel last time I intend to redo out of alloy this time. Lets see how this all goes....

  13. #58
    Join Date
    17th February 2019 - 22:52
    Bike
    Gsxr250/TS125ER Bucket racer
    Location
    Nelson
    Posts
    19

    Frankenbucket V2.0 nearing completion.

    Hello all,

    its been a long time since I have updated this thread.

    It weighs 75kg wet!

    Needless to say I'm totally stoked with how light it has ended up.

    KX85 ignition setup and flywheel is all fitted and works well. The KX85 flywheel weighs around 400 grams and the TS125 flywheel it replaced weighs 900 grams (even after I lightened it on the lathe). Ignition timing is currently set at 22deg Before TDC and it runs well. Standard KX cdi appears to retard timing several degrees as the revs rise.

    I also have just dug out a Trailtech Vapor dash I had left over from an oldd streetfighter project. So now I have a tacho and a shiftlight. dunno how much I need it or if I will even be able to see it while racing. But It ws just gathering dust in my shed previously so why not.

    I still have a few tidying up things to get done (eg covers around ignition system on the frame) but the bike is pretty much ready to go.

    See you on the track, Hopefully a mission to Tokoroa is on the cards sometime soon.

  14. #59
    Join Date
    17th February 2019 - 22:52
    Bike
    Gsxr250/TS125ER Bucket racer
    Location
    Nelson
    Posts
    19

    KX85 Ignition etc.






  15. #60
    Join Date
    18th May 2007 - 20:23
    Bike
    RG50 and 76 Suzuki GP125 Buckets
    Location
    Auckland
    Posts
    9,964
    .
    75kg. that is very good.

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