20 Most Recent 2006 Yamaha Ybr 125 Questions & Answers

Its a faulty ignition switch. There are two contacts that switch, one is on the power to starter, which is why it cranks, the other is power to the ignition/ECU. Fit a new ignition switch to cure the problem.

Hi les
Not much to start with here unfortunatly mate. A free flow muffler will help top end speed, change the factory airbox to a K&N style pod air filter, other than that, hugging the tank at top speed :) If you do change these parts, you may also need to increase the main jet size to richen up the mixture for better tuning of the motor with the better flowing parts. This bike has a top speed of 100kmp and produces 10 hp, so you may only expect to get at best less than 1 extra neddy, and perhaps another 5 km/hr.... I suggest upgrading to a bigger machine of you feel the need for speed :)
If its 125's you are into, test drive a Honda CBR 125R 6 speed fuel injected 13.4 horsepower, and good for 120km/hr
regards robotek

does the motor star or just spin if it starts change the spark plugs please give more info thank you