Binod Sah, 28, of Lahan-1 was hit by the Indian jeep coming from opposite direction.
The jeep fled after the accident and the police said they are searching for it.
Motorcyclist killed in road accident
Lamichhane claimed that the cooperative fraud case was used as a pretext to launch political retaliation against the party, which intensified after the Nepali Congress-led government came to power.