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Thread: Differences & Similarities between 135cc RX series

  1. #1
    Rusted karthikdattag's Avatar
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    Thumbs up Differences & Similarities between 135cc RX series

    Dear All,

    I am listing down some basic differences & similarities between 4-speed & 5-speed RX135 (Includes RXG & RX-Z), which will help people to differentiate & learn more about these legendary series once produced in India.


    1. Bore Kit (a.k.a Piston-Cylinder Kit / Barrel / Block)

    4-Speed - '4TL00' with OEM "ART" STD piston '4Y201', Rating: 12BHP @ 6500RPM
    5-Speed - '4TL10' with OEM "ART" STD piston '4Y201', Rating: 14BHP @ 7500RPM


    Note1: To check the originality, the LH side of Cylinder (Gear shifter side) has ‘4TL00’ or ‘4TL10’ marking along with ‘132cm3’ (which is the displacement) and the RH side (Crank Kicker Side) has the batch of manufacturing, for ex., E1, E2, E3 or E4 (All of them have exactly similar performance, people who swear by performance of E1 being the best, is all crap.) Also if nothing is mentioned or some other type code is mentioned, then the Cylinder is a fake, except for '4Y201' which is the original block of RX-K.

    Note2: The Cylinder packing has the following description on it:


    1. RX135 4-Speed / RXG / RX-Z 4-Speed: "Cylinder Kit RXG"
    2. RX135 5-Speed / RX-Z 5-Speed: "Cylinder Kit 5-Speed"

    Note3: Displacement calculation

    For Std RX135 being a single cylinder engine, we have the following inputs,

    Bore Dia = 58mm
    Bore Radius = 58/2 = 29mm
    Bore Radius Squared = 841mm2
    Stroke Length = 50mm
    Pi = 22/7 = 3.142857 (Corrected upto 6 decimals)
    Number of Cylinders = 1

    Displacement in mm3 = Stroke x Bore Radius Squared x Pi x No. of Cylinder
    = 50 x 841 x 3.142857 x 1
    = 132157.143

    Displacement in cm3 = 132157.143/1000
    = 132.157 (Corrected upto 3 decimals)



    2. Piston Kit

    The OEM Piston kit for Indian RX135 series are from "ART" Japan. For Indian models piston sizes from STD to 0.5mm are available (in steps of 0.25mm). On careful observation of the piston, one can identify if it is original or not. Simply turn the piston upside down & inside we can see "ART" & "4Y201" clearly written. This is the proof for original piston. The piston kit essentially comprises of

    Piston (STD/0.25mm/0.5mm)
    Piston Rings
    Piston Pin
    Clips

    Note: The pistons are the same for RX135 4-Speed, RX135 5-Speed, RXG, RX-Z.




    3. Carburettor Assembly

    The OEM Carb assembly for RX135 is Mikuni / UCAL Mikuni. The Carb assembly are different for both 4-Speed & 5-Speed versions.

    4-Speed: '4TL 01' with Main Jet = 165 & Pilot Jet = 17.5
    5-Speed: '4TL4 20' with Main Jet = 135 & Pilot Jet = 15.0

    These are VM type of Carburettors manufactured by Mikuni & both are 22mm. Additonally VM24 & VM26 are used for RX available in South-East Asian countries (Like Singapore, Indonesia & Malaysia) and in South American Countries (Like Peru, Argentina & Brazil). The details of these are given below:

    VM24: '2YA 00' with Main Jet = 145 & Pilot Jet = 20.0
    VM26: '55K 00D' with Main Jet = 210 & Pilot Jet = 22.5

    These carbs (VM24 & VM26) are direct fit to Indian RX135s with some minor jetting changes required based on the Power output of the engine.

    Note: The type code is mentioned just above the 2-T oil Inlet in the carb, with that the originality can be confirmed.



    4. Head Assembly

    The heads are also different for 4-speed & 5-speed. The type code is mentioned below:

    RX135 4-Speed: '4TL5' written on inner side (Top) of Head (For OE fitting Catalytic Converter type)
    RX135 4-Speed / RXG: '4TL00' written on inner side (Top) of Head (For OE fitting Chrome Silencer)
    RX135 5-Speed: '09L' written on inner side of Head



    5. Clutch Bell Assembly with Primary drive

    The clutch bell assembly are the same for 4-speed & 5-speed RX135 (Including the number of Clutch plates), but it is different for RX-G. Below are the differences mentioned:

    RX135/RX-Z 4-Speed/5-Speed: Main Bell = 74 Teeth
    Primary Drive = 19 Teeth

    RX-G : Main Bell = 71 Teeth
    Primary Drive = 22 Teeth



    6. Chain Sproket

    The sproket (Front & Rear) are all different for entire RX series. Detailed info given below:

    4-Speed: 16T / 34T
    5-Speed: 15T / 38T
    RX-G : 15T / 37T



    7. Gear Box
    The Gearbox are obviously different for 4-speed & 5-speed. Details below:

    4-Speed:
    1st = 35/11 = 3.182
    2nd = 30/15 = 2.000
    3rd = 26/19 = 1.368
    4th = 23/23 = 1.000


    5-Speed:
    1st = 35/11 = 3.182
    2nd = 30/15 = 2.000
    3rd = 26/19 = 1.368
    4th= 24/22 = 1.091
    5th = 22/24 = 0.917



    8. Engine

    The engine may be classifed based on Top End (Included Cylinder+Piston & Head) and Bottom End (Includes Clutch Assembly, CrankShaft, Engine Bearings, Crank Kicker, Engine Cases, Clutch/GB Covers, Ignition coil, GearBox Assembly etc as major components). Most of these items are already covered in points 1 to 7 above.

    Note1: The RX135 4-Speed & RX-Z 4-Speed share the same Engine, likewise RX135 5-Speed & RX-Z 5-Speed share the same Engine.

    Note2: The CrankShaft Assembly is the same for RX135, RX-G, RX135 5-Speed & RX-Z.

    Note3: We can identify looking at the Engine number if the Bike was a 4-Speed version or a 5-Speed verion. Check the details below:

    1. RX135 (With Chrome Silencer as OE fitting): 1L5 XXXXXX
    2. RX135 (With Catalytic Silencer as OE fitting): 4TL XXXXXX
    3. RX135 5-Speed: 1L7 XXXXXX
    4. RX-Z 4-Speed: 1L3 XXXXXX
    5. RX100: 1L1 XXXXXX

    P.S: The RX135 5-Speed never came with OE fitted Chrome silencer, the OE fit was the Big Hot-Tube type catalytic converter Exhaust.


    Any comments/additions are most welcome. Hope you all enjoyed this read.

    I request all senior members to help make this thread sticky, so that all the RX enthusiasts are benifitted by this & it would avoid new joinees to ask unwanted questions. I sincerly request the moderator to look into this.

    Thank you.

    -Karthik..
    Last edited by karthikdattag; 01-19-2012 at 10:33 AM. Reason: RX-Z Engine Number format updated
    B7ACKTHORN, maninderz and Mr.Boss like this.

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    Rusted Aryan's Avatar
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    Topic Approved.
    ...in search of that perfect world - My Travel Blog :)

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    @ Mod, Thanks a lot for speedy approval.

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    Good thread.An excellent guide for prospective buyers and newbies.

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    Thought, I'd be the first one to Thank You to have come up with such a toic. I'm going to rate this 5 star right away!!! Neverthless - Thanks

    Quote Originally Posted by karthikdattag View Post
    I sincerly request the moderator to look into this.
    +10000000000000000000...
    Last edited by aargee; 12-08-2010 at 04:05 PM.
    Skill is what keeps you on a Motorcycle
    Awareness + Skill is what keeps you out of harm's way
    ATGATT + Awareness + Skill means you might Live To Ride another day

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    Grrrreeat info there.. this is an absolutely useful guide for anyone to identify their bikes/engines etc. Most of the information here, is news for me as well.

    How about something for the RX100 as well, im sure there will be a lot of members waiting for info on that as well.


    My offerings to the gods of speed -

    - KTM Duke 200
    - Yamaha RXZ 5 speed



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    now i need help. What would be the recommended jets with a VM28, running a 5SPEED BLOCK? Bike is currently running 165 main, and 20 pilot, and it stutters around the 5000rpm mark. Please advise.


    My offerings to the gods of speed -

    - KTM Duke 200
    - Yamaha RXZ 5 speed



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    Rusted aargee's Avatar
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    Quote Originally Posted by jd666 View Post
    now i need help. What would be the recommended jets with a VM28, running a 5SPEED BLOCK? Bike is currently running 165 main, and 20 pilot, and it stutters around the 5000rpm mark. Please advise.
    What's your needle position with 1 being top & 5 being bottom? What's the plug color? If its jet black, then move the needle one position above from the current.
    Skill is what keeps you on a Motorcycle
    Awareness + Skill is what keeps you out of harm's way
    ATGATT + Awareness + Skill means you might Live To Ride another day

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    good work karthik ! nice effort

    Edit: Karthik See if its possible to post following
    * Details Disc Break Set of the RXZ5 speed
    * Difference in electrical between a RX & RXZ Series: Head Lamp,Pilot Lamp,Tail Lamp
    * Difference in Meter Consoles of the Difference RX Series
    Last edited by arvindraju; 12-08-2010 at 04:25 PM.

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    Quote Originally Posted by jd666 View Post
    now i need help. What would be the recommended jets with a VM28, running a 5SPEED BLOCK? Bike is currently running 165 main, and 20 pilot, and it stutters around the 5000rpm mark. Please advise.
    JD, i am assuming yours is a stock 5-speed barrel. For such a big carb, 165 main jet is too big considering the power of your barrel. Try main jet number = 135 & let us know. Retain the pilot jet = 17.5 for now.

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