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  1. TW 125 needle shim & general modification help needed

    Performance and Customization
    Hi! I recently decided that I should modify my bike, to get better performance out of it. Right now I get about 95km/h of speed, but I'd like to go up to 110km/h, at least. I've heard some things about a needle shim mod , and I'm wondering if this could be done for the TW125? I'd also like to...
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