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Differences & Similarities between 135cc RX series

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  • karthikdattag
    replied
    Originally posted by jd666 View Post
    @kartik - you can see it in my profile, i have put up the pics in an album.
    JD, i have gone through the Pics of Cylinder kit as well as the Con-Rod assembly in detail. I am afraid, these are not the original ones. The RX-K OE Cylinder has '4Y201' marking on it & even the Con-Rod should have '4Y2' marking on one side & 'YAMAHA' on other side, else it is something else.

    I remember "sunnyboi", had previously confirmed this in this very forum. I have even checked with my Tuner who has been importing these things for quite some time now & he too has a similar opinion.

    I would leave this matter to other seniors who have the exp with RX-K parts.

    Leave a comment:

  • aargee
    replied
    Originally posted by jd666 View Post
    Guys the VM28 round slide, is currently running needle position second from bottom, and total notches are 5. Currently pilot jet is 20, and main is 165.
    If I'm not wrong, your plug should show a jet black color; put your needle one step above or rather in middle. You'll need to fiddle with airscrew (allow less air) when you make this adjustment. Incase, your plug is not in jet black color, pls let me know.

    Leave a comment:

  • jd666
    replied
    @kartik - you can see it in my profile, i have put up the pics in an album.

    Guys the VM28 round slide, is currently running needle position second from bottom, and total notches are 5. Currently pilot jet is 20, and main is 165.

    Any suggestions???

    Leave a comment:

  • aalop143
    replied
    nice info karthik ,keep going on .........

    Leave a comment:

  • karthikdattag
    replied
    @ Arun, Thanks a lot.

    @JD, 4Y201 OE RX-K bore, wow. Can you post some pictures of this?

    Leave a comment:

  • jd666
    replied
    ^^ will check needle position and update. thanks for the heads up guys!!

    Leave a comment:

  • BigBore
    replied
    Originally posted by jd666 View Post
    yes it is a 4Y201 RX-k block. running a flatslide 28mm. what main jets/pilot jets do u recommend??
    Which flatslide are you using? If using a "TM28 Smoothbore" then the stock jets come with 15 pilot jet and 180 main jet. Will recommend upgrading the pilot jet to 20.

    Leave a comment:

  • BigBore
    replied
    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.
    Try running on 180 main jet & pilot jet 17.5 if using VM28 on the 5 Speed block!

    Leave a comment:

  • BigBore
    replied
    Great info Karthik! Keep it up!

    Cheers!

    Leave a comment:

  • aargee
    replied
    JD, check your needle position before jetting, unless you've lots of money Lol

    Leave a comment:

  • jd666
    replied
    yes it is a 4Y201 RX-k block. running a flatslide 28mm. what main jets/pilot jets do u recommend??

    Leave a comment:

  • karthikdattag
    replied
    Originally posted by aargee View Post
    No argument too; jetting involves atleast Rs 200, fiddling with needle is FREE. Its one's choice whether to explore FREE options & then spend or viceversa!!! I speak my own experience
    Ah, so you are talking about adjusting the needle.Thats also a good idea.

    Leave a comment:

  • aargee
    replied
    Originally posted by karthikdattag View Post
    No argument here, but jetting is something which comes more with practical experience & thereby we deduce some thumb rules.
    No argument too; jetting involves atleast Rs 200, fiddling with needle is FREE. Its one's choice whether to explore FREE options & then spend or viceversa!!! I speak my own experience

    Leave a comment:

  • karthikdattag
    replied
    Originally posted by SriramEfunds View Post
    Great info Karthik. I thought you had similar post in 2 stroke thread too.

    Hope we can direct any newbies with regards to some elementary questions!
    Yes, i had a similar post, but that was stock & this is a fully blown setup. LOL.

    Now for sure we can direct the newbies to this one, if it is related to RX series.

    Leave a comment:

  • karthikdattag
    replied
    @ All Seniors, thanks a lot for your wishes. I will definately try to work out much more details on other RX series as well. All of your Inputs are most welcome.

    Leave a comment:

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