I have no mods to the engine and it's as quick as a modded bike. lol. 14 teeth is a must for off road. If you do mainly tarmac miles I wouldn't bother. Again, if you do mainly off road, you don't need a power mod anyway, it has plenty power for that.

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Touratech big guard. Yamaha handlebar guards. Pivot Pegz. Yam main stand. Camel Toe. 30 mm risers. 14 tooth front sprocket. Big balls. Old and not wise.