GOAL: BE ULTRALIGHT!
one master list, four trips — less weight = more experience
| Engine | 149cc air-cooled SOHC single, 22mm carburetor, 9.5:1 compression, 5-speed, 17T/49T sprockets |
|---|---|
| Power | ~12 hp claimed at crank; ~10.8 hp measured at rear wheel (sea level) |
| Fuel tank | 10.6 L (2.8 gal) |
| Fuel economy | ~30–34 km/L typical (70–80 mpg) → ~300 km range; carry the bladder past 220 km without a Pemex |
| Engine oil | SAE 10W-30, API SJ+, JASO MA. Capacity 1.0 L at change (1.2 L after rebuild). Burns oil — CHECK LEVEL EVERY GAS STOP |
| Curb weight | 128–129 kg (282–284 lb), full tank |
| Max weight capacity | 155 kg (341 lb) — rider + all gear + accessories, per Honda service manual |
| Tire pressure | 22 psi front + rear up to 90 kg load; 29 psi at maximum weight capacity |
| Top speed | ~105–110 km/h solo at sea level; loaded + altitude cuts this hard |
| MAX | MED | UL | NKD | |
|---|---|---|---|---|
| Mounted racks + armor | 22.9 | 22.9 | 22.9 | 22.9 |
| Cargo (this checklist) | 69 | 52 | 46 | 10 |
| Left for the rider | 63 kg | 80 kg | 86 kg | 122 kg |
| Margin, 75 kg rider aboard | −12 kg OVER | +5 kg | +11 kg | +47 kg |
Read that MAX column honestly: with Mav's 75 kg aboard, the full MAX build is ~12 kg OVER Honda's rated capacity before adding fuel in the Rotopax, water, or food. The bike will still move — Mexican XR150s haul families of four — but brakes, suspension, bearings, and tire ratings are past spec. Ride it like it's overloaded, because it is.
| Altitude | HP | Realistic cruise, loaded |
|---|---|---|
| Sea level (coast, Sonora lowlands) | ~12 | 85–95 km/h |
| 1,000 m | ~10.8 | 75–85 km/h |
| 1,500 m (foothills) | ~10.2 | 70–80 km/h |
| 2,000 m (sierra towns) | ~9.7 | 60–70 km/h |
| 2,500 m (Creel, high passes) | ~9.1 | 50–65 km/h; steep grades 2nd–3rd gear at 30–40 |
| 3,000 m (highest crossings) | ~8.6 | 45–55 km/h; plan double time on climbs |
Cruise speeds assume MED-level load. MAX load or headwind: subtract another 5–10 km/h. The carb runs richer up high — expect rougher idle and worse fuel economy above 2,000 m.
Full MAX build — on lighter tiers, skipped items just stay home.
drag to spin · scroll or pinch to zoom · tap a compartment to open it · switch tiers above and watch the bags come off
Keys: arrows = fwd/back/up/down · A/D = left/right · X/Y/Z = rotate (Shift = reverse) · −/= size · Shift = big steps. Export downloads a file — send it to Claude to make your edits the new default.