250 fzr carbs

Yamaha FZ 25 discussion forum:


250 fzr carbs

250 fzr carbs 
colin jewsbury said 2010-04-17 12:36 
 
i have used a 250 fzr motor in my homebuilt honda 162 replica.not using airbox,it was runnig fine on four bellmouths with filter pads inside. now i have fitted the open megga exhausts it starts and ticks over but is very iffy on pickup.any suggestions on main jet sizes/mods would be most welcome.i cannot afford rolling road/dyno jetting,so any tips would be most welcome.regards colin 
 
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