GMR Performance

Motorcycle Shop Details

GMR Performance in Newton, Iowa, stands out as a premier destination for motorcycle enthusiasts seeking top-tier performance upgrades and expert maintenance. People who visit this motorcycle shop consistently praise the owner Steve’s exceptional knowledge and honest approach, particularly noting his ability to transform stock bikes into high-performance machines through precise dyno tuning and custom builds. The facility features an impressive dyno setup with advanced diagnostic equipment, while maintaining an exceptionally clean and organized workspace that sets it apart from typical motorcycle repair shops.

Motorcycle Shop Reviews

People who visit this motorcycle shop highlight the exceptional quality of work, particularly for Harley-Davidson motorcycles, with many reporting significant performance improvements after service. Visitors frequently mention the shop’s honesty and transparency, noting how they often receive money-saving recommendations rather than unnecessary upgrades. The shop’s expertise in dyno tuning and engine builds receives particular praise, though some visitors have noted occasional communication challenges when trying to reach the shop by phone.