Recently bought a yamaha beartracker and found that it was more powerfull than another beartracker i already owned so decided to swap carb from one i bought which was an original mikuni carb to other one which has a cheep chineese one in it but it did not like it at all and was bogging under load at full throttle ( leaning out) so just changed it back to original chineese one and it was happy again. Just tought it was strange that 2 identical bikes did not like each others carbs. It also was nothing to do with retricted fuel on one bike as there is plenty of flow on both bikes. Anybody any ideas?
