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DT125R FORUM

Yamaha dt 125 2003

Scheduled Pinned Locked Moved Welcome New Owners!
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  • D Offline
    D Offline
    Dirt_Trail125
    wrote on last edited by
    #1

    Hello everyone. First time posting on here 🤦‍♂️but in need of some experienced information needed on helping me get the most of my dt. It's a fantastic machine for what it is and in incredible condition. But I'm 33 and need it to be more punchy on the power level. It is fully standard I'm only the second owner and like I said standard 😩. There has been no mods done to the bike at all. Any suggestions greatly appreciated 👍

    NINJAN 1 Reply Last reply
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  • CalumC Offline
    CalumC Offline
    Calum
    wrote on last edited by
    #2

    Hello & Welcome,

    2003 models are the worst for restrictions. Down to the point where the CDI is restricted.

    A zeeltronic, aftermarket exhaust, bigger carb, some carbon reeds and you'll be golden.

    Make sure you get yourself a 3MB cylinder head, likely to be the restrictive 3BN head on yours. Could get the 3BN machined to take the restriction out, get the barrel ported at the same time.

    Always Originate, Never Pirate!

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  • NINJAN Offline
    NINJAN Offline
    NINJA
    replied to Dirt_Trail125 on last edited by
    #3

    @Dirt_Trail125 Hi and welcome, post some pics of your new toy for us all to see. There is also a guide for derestricting the DTR here;

    https://dt125r.co.uk/topic/578/derestricting-guide

    Those should be your first steps, just removing the rev limiter alone will make a big difference. simply follow the steps in the guide. 😉

    SEDUCED BY THE DARK SIDE!!!

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  • Louis-DT-WRL Offline
    Louis-DT-WRL Offline
    Louis-DT-WR
    wrote on last edited by
    #4

    Do you have the powervalve operating? On a 2003 it should but, but I know peoplile to remove the servo and lock the valve open

    1 Reply Last reply
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