Questions & Answers for: Yamaha XT 125 X ht 70

...125r only goes 50mph and should go 70mph what would cause this First, Why should it go 70.. it might be geared down for take off or off road riding...will the engine rev to the max rpm at 50mph??

ht lead connection is tight any suggestions would be appreciated Hi, Anonymous and the usual suspects are: 1. Fouled spark plugs. 2. Severely discharged or a damaged battery, should have 12.5 volts or