Organic and sculpted
Single-Cylinder 400cc DOHC Engine
- Bounding box
- 67.6 × 120 × 49.5 mm
- Engine
- Organic B-rep
- Parameters
- 0
- Published
- October 29, 2026
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The prompt
Single-cylinder 4-stroke motorcycle engine, 400cc class, liquid-cooled, DOHC 4-valve. Generic/unbranded design — no logos, text, or badges anywhere. Dimensions: 89mm bore, 64mm stroke, ~399cc displacement, conrod ~112mm center-to-center. Parts: cylinder block (slight forward lean, finned, 4-6 head bolt bosses) + cylinder head (DOHC, 4 valves, spark plug boss, intake port ~40mm, exhaust port ~34mm) + domed cam cover (blank, no text) + piston (89mm dia, domed crown, 3 ring grooves, pin boss) + I-beam conrod + single-pin crankshaft with 2 counterweights + split crankcase with sump and engine mount lugs + simple domed clutch cover + exhaust header stub with 2-bolt flange. Material: cast aluminum, matte/sand-cast texture for block/case, brushed aluminum for covers, steel bolts (black oxide). Restrictions: no brand names/logos/decals anywhere, no exact replica of any single manufacturer's casting design, no electronics/wiring, realistic proportional wall thickness and fin spacing, M6-M10 bolt sizing throughout.
Parameters
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