1985-1986 Honda Fourtrax 125 TRX125 Shop Manual, Page 237Get this manual
TROUBLESHOOTING
ENGINE LACKS POWER
Probable Cause:
1Ra ise wheels off the ground and WHEEL DOES NOT SPIN
spin by hand(Transmission in neutral) WHEELSPINS FREELY
Brake dragg ing
12) Worn or damaged wheel bearing (3) Wheel bearing needs lubrication 14) Drive chain too tight
2 Check tire pressure with tire
gaugePRESSURE NORMAL
PRESSURE TOO lOW
Punctured tire
12) Faulty tire valve
3 Try rapid acceleration from low
to secondENGINE SPEED DECREASES WHEN CLUTCH IS RELEASED
ENGINE SPEED DOES NOT CHARGE WHEN CLUTCH IS
RELEASED
Clutch slipping
Worn clutch iscp late
(3) Warped clutch discplate