Yamaha XT 550 5Y3 spare parts

Yamaha XT 550 5Y3 spare parts-Rally rally genes for the street

With the XT 550 (5Y3) Presented Yamaha in 1982 Single-cylinder enduro, the Dakar technology in an everyday package pressed: four-stroke-Sohc with a 4-valve head, progressive Monocross-swing, 12-volt electrics-and for the first time in Large series endurosis segment a vacuum-CV carburetor double system that Response behavior and top performance. The result: 45 hp at 6,500 min⁻¹, 5.1 kg · M torque and 144 kg Dry weight - enough to Paris → Dakar-DNA on To make serpentines like dirt roads noticeable. Four decades later Lives the myth, but piston rings, decorative mechanics and ydis plastic Sugagen require loving care. This Category description provides a 360 ° overview of Yamaha XT 550 5Y3 spare parts, Maintenance intervals, Upgrades and sources of supply - practical in our Motorize workshop, where more than twenty 5Y3 engines since 2005 were revived.

1 | Genesis & type codes

The XT series started in 1976 with the legendary XT 500 (1E6). 1982 followed the XT 550 Under the type code 5y3. Compared to the 500, Yamaha bore and stroke enlarged to 92 × 83 mm, Integrated one Yamaha Dual Intake System-Trascher battery (Ydis) and donated 46 mm more travel on the rear. 1983 came XT 600 (43f)-Many 550 components fit plug-and-play: Cylinder head, clutch, alternator. Special features of the 5Y3:

2 | Motor & intake-four valves, a carburetor duo

The 558 cm³ SOHC one-cylinder uses a gear/chain hybrid transmission to the camshaft, torsion stiff crank with 78.5 mm hub cone gap and forged pistons with 10.0: 1 compression. The YDIS system Combined primary CV carburetor (Ø 32 mm) and secondary slide (Ø 26 mm)- vacuum and Depending on the load, the second slide opens for full load. Core parts, which should never be missing during the rebuild:

Practice setup: Requirements 125 HD / 35 LD, needle 4J13-3, swimmer stand 6 mm. With an open supertrapp, 128 HD + secondary nozzle 75 is recommended. Oil: 10W-40 ester / 2.1 l incl. Filter-every 3,000 km. Valve game: Admission 0.05 mm, outlet 0.10 mm every 5,000 km; Tax chain tensioner Automatic, yet check every 10,000 km.

3 | Electrics & ignition-CDI power for one-kick starts

12-V lighting machine 180 W, controller/ rectifier A1T. CDI box 5Y1-85540-10 delivers 13 ° V. OT idle, 38 ° at 5,500 min⁻¹. Typical source of error: Pickup cable rubs on the liminated lid; Tension > 1 V leads to misfires. Upgrades & replacement:

4 | Chassis & brakes-monocross gene for gravel & asphalt

36 mm telegabel with 255 mm travel, at the back Monocross I -Progressive lever and Kyb spring bone, 220 mm Away. Brakes: front Ø 267 mm single disc with 2-pistons Nissin saddle, back Ø 150 mm aluminum drum. That can be improved Setup with progressive fork springs (Wilbers 601) and steel flex line.

5 | Maintenance plan & wear

6 | Typical weaknesses & workshop solutions

7 | Sensible upgrades-rally flair without original loss

• ✓ 41 mm Keihin FCR - +4 hp, better Response behavior, Map 128/38, TPS on CDI module.
• ✓ Oil cooler-kit off-road racing -7 series, 10 ° C less oil temp.
• ✓ DC-CDI Ignitech - variable Ignition curve, Launch-Limiter.
• ✓ Excel rims 1.85 × 21 / 2.50 × 18 – 600 g lighter, high-strength 7000er aluminum.
• ✓ Enduro-Lima 200 W -LED set, GPS tracker, heating handles without burglary.

8 | Parts supply & scene

Yamaha continues to list pistons, control chain, clutch hub and Seals rates. Used parts: xt550.de-Forum, Horizons Unlimited. 3-D printed air filter box lid, Laser-cut pinion trees and Plastic tank replicas (Acerbis 22 L) keep the rally look fresh. Stainless steel dampers (SR Racing Enduro) save 1.4 kg; ABE included.

9 | Conclusion-XT 550 5Y3: off-road cult that needs partial love

The XT 550 5Y3 Is the link between the puristic XT 500 and the long -stroke XT 600. Your snot Response, the sonorous single -cylinder drums and the agile Monocross-Heck still inspire-provided that ydis system, Tax chain and electrics are in top shape. With our XT 550 spare parts -from Viton-Ansugricht over Iridium spark plugs up to the swinging-needle camp kit-stays her 80s single cylinder ready for forest paths, gravel pits and Spontaneous alpine passes. Kick, Ride & Smile - with the right ones Parts.

Now browse - and your XT 550 treat all spare parts that you fit for Make the next kick start!