The Ref ·
How to read a motorcycle spec sheet without getting played
Peak power sells bikes, but it is the fourth most useful number on the page. A field guide to the specs that predict how a bike actually rides.
Manufacturers write spec sheets the way estate agents write listings. Nothing on the page is false, but the type size tells you what they would rather you not compute. Here is the order in which the numbers actually matter.
1. Power to weight, not power
A 75 hp single in a 156 kg supermoto will destroy a 95 hp twin carrying 30 more kilos out of any real-world corner. Divide peak power by wet weight before you get impressed by either number alone. It is the first thing our scoring engine computes, and it is weighted higher than raw power for exactly this reason.
2. Torque, and where it lives
Peak torque tells you less than the rpm it arrives at. 39 Nm at 7,000 rpm rides completely differently from 40 Nm at 5,500. The lower and flatter, the less you work the gearbox in traffic and the more relaxed the bike feels two-up.
3. Wet weight, with a full tank
Watch the footnotes. Some brands quote dry weight, some quote wet without fuel, some quote ready to ride. We normalise everything to wet weight with a full tank in our data, because that is the bike you actually push around a car park.
4. Suspension adjustability
The word WP or Showa on the fork leg means little by itself. What matters is whether you can adjust it: a non-adjustable fork is set for a 75 kg test rider and that is the end of the conversation. Fully adjustable units can be set for your weight, your roads and your pace. Our methodology scores this with a public tier table.
5. Service and valve intervals
The cheapest bike to buy is often the most expensive to own. A 42,000 km valve interval, like Yamaha's CP2 engine, is thousands of euros of avoided labour versus a 20,000 km interval over a bike's life. It is the least sexy line on the sheet and one of the most predictive of total cost.
Every comparison on this site runs these exact priorities through a fixed formula, so you can check our math instead of trusting our taste. Start with any comparison and click through to the score breakdown.