IronHead

Kawasaki DOHC inline-four restoration — 738cc KZ750 family: KZ750 B1 (1976), KZ750 Twin (1982), KZ750E (1980-1982), KZ750H (1980-1983), and KZ750R (1981-1983). Covers the oil-fed cam chain tensioner body (the source of every Kawasaki four tick), the 1979 points-to-CDI trigger pickup transition on the KZ750H / KZ750R, the three-phase alternator with full-wave Reg-Rec, the bench-side cover that follows the failures of the last KZ rebuild cycle, the year-by-year differences across the 1976-1983 KZ750 stack, the wiring schematics for the pre-1979 points / 1979+ CDI / lighting & signal buses, and a printable PDF.

• 738cc DOHC 66.0 x 66.0 mm bore/stroke
• Cam-chain tensioner 4-6 mm load range
• 1979 points-to-CDI trigger pickup transition
• Kawasaki 57001-1179 tensioner body tool

Kawasaki 748cc air-cooled three-cylinder two-stroke restoration - the 1969-72 H2 short-stroke (50.0 x 60.0 mm), the 1972-73 H2A badge refresh with the wider Mikuni VM26SC venturi, the 1973-74 H2B with the revised ignition trigger pickup and the optional oil-injection delete, and the 1974-75 H2C / KH500 continuation on the same 748cc floor with a tighter CDI air-gap window. Includes the pre-mix oil pump calibration band (factory recommendation 32:1 mineral under run-in, 40:1 after break-in), the Mikuni VM26SC triple-carb sync band (+/-2 cmHg - looser than the four-stack / the three-cylinder pulse cadence discourages a tighter window), the CDI trigger pickup air-gap window (0.6-0.8 mm H2 / H2A narrows to 0.4-0.6 mm on H2B / H2C / KH500 - a wrong air-gap lands a no-spark fault after the 3000 rpm transition), and the per-year H2 / H2A / H2B / KH500 diagnostic matrix riders actually hit (pre-mix fuel knock, CDI misfire above 3000 rpm, Mikuni VM26SC pilot overdraw, exhaust-port carbon lock).

• 748cc 3-cyl two-stroke, 50.0 x 60.0 mm
• Pre-mix oil pump calibration CDI trigger air-gap
• Mikuni VM26SC triple-carb sync band
• H2 / H2A / H2B / KH500 model-year deltas

Honda SOHC inline-four (K0-K8), disc-brake era. Factory tolerances, model-specific tools, and sequenced teardown/reassembly for the engine, gearbox, carbs, and electrical harness.

• Cam chain deflection 8-12 mm cold
• Intake valve clearance 0.05 mm cold
• Quad-carb sync within +/-1 cmHg
• Factory K0-K8 model-year deltas

Kawasaki DOHC inline-four restoration - the 1973 Z1 903cc flagship single-year catalogue. Launch spec: 903cc short-stroke bore, Mikuni VM28SC round-slide carburettor quad, twin-points contact-breaker F-mark ignition at 10-12 deg BTDC, three-phase alternator with full-wave Reg/Rec, oil-fed cam-chain tensioner with 4-6 mm load range, telescopic fork at 155 mm oil level, and the disc-brake front spec that defined the late-1970s Japanese sports-four. Includes the diagnostic matrix riders actually hit (oil-fed tensioner rattle, points drift, charging ripple, Mikuni pilot mis-match, fork-oil-level cold-start dive) and the parts-sourcing sheet (OEM Kawasaki 11004-002 / 11005-008 / 11009-033 / 11012-022 + aftermarket Z1 Enterprises / RPM / Vape / Mike's XS).

• 66 mm bore x 66 mm stroke 903cc
• Mikuni VM28SC 28 mm pilot sync
• Points ignition F-mark 10-12deg BTDC
• Cam-chain tensioner 4-6 mm load range

Honda SOHC parallel twin (1968-1973 K0, K1, K2, K3, K4, CB350G), four-stroke 325cc. Factory tolerances, model-specific tools, year-by-year diff matrix, diagnostic matrix, parts-sourcing sheet, common-pitfalls closer, and the 14-item takeaways block.

• Cam-chain deflection 4-6 mm cold
• Intake + exhaust clearance 0.05 mm cold
• Twin-carb sync within +/-1 cmHg
• K0-K7 bore map + auto-tensioner service

Honda SOHC parallel twin (1965-1974), 444cc. The first Honda twin with shim-under-bucket valve adjustment. Covers the K0-K3 curly-spring tensioner era, the K4-K7 blade-tensioner era, the K7 TCI ignition crossover, and the model-specific tooling for the 70mm bore / Keihin twin-carb layout.

• 70 mm bore across the entire 1965-1974 K-code run
• K0-K3 curly-spring -> K4-K7 blade-tensioner crossover
• K4+ shim-under-bucket first (0.05 / 0.08 mm cold)
• K7 TCI step + twin Keihin 30 mm carbs