Shares in Harley-Davidson slumped 5% in pre-market trading on Tuesday after the company reported lacklustre fourth-quarter results and issued disappointing guidance.
The company reported fourth-quarter net income of $8.31m versus $47.2m in the same period of 2016. Revenue fell to $1.23bn compared with $1.11bn in the prior year.
Harley-Davidson shipped 241,498 motorcycles in 2017, at the lower end of its forecasts of 241,000 to 246,000 units.
Retail sales in the US, its largest market, declined 11.1% to 23,195 units, compared with 2016.
The iconic motorcycle maker also lowered its forecasts for 2018, projecting shipments of between 231,000 and 236,000.
"Our actions to address the current environment through disciplined supply and cost management position us well as we drive to achieve our long-term objectives to build the next generation of Harley-Davidson riders globally," said chief executive Matt Levatich.