Valve Adjustment Kit | Honda CB175 / CB200

Sale!
Valve Adjustment Kit | Honda CB175 / CB200

Valve Adjustment Kit | Honda CB175 / CB200

Original price was: $8.00.Current price is: $4.51.

69 in stock

SKU: K4145 Category:

Description

Valve Adjustment Kit | Honda CB175 / CB200

Valve adjusters rarely go missing on these bikes, but after fifty years they get worn and pitted. A pitted adjuster face or a lock nut that will not hold is how a clearance you just set drifts back out on the ride home.

Why You Need This

The adjuster screw sets the gap between the rocker arm and the valve stem, and the lock nut holds that gap where you put it. Once the face is pitted or the threads are tired, the setting moves. Too tight is what does damage; too loose only makes noise.

We set these every 1,500 miles (2,400 km) as part of the standard tune-up. The order matters, because each step feeds the next: oil change, then cam chain, then valves, then ignition timing.

Specifications

Spec Detail
Replaces OEM Parts 90012-333-000 (adjuster screw), 90206-KM3-000 (lock nut)
Fits Models CB175 K0 (1968), K3 (1969), K4 (1970), K5 (1971), K6 (1972), K7 (1973); CL175 K0, K3–K7 (1968–1973); SL175 K0 (1970), K1 (1971–1972); CB200 K0 (1973–1974), CB200T (1975–1976); CL200 (1974)
Sold As Sold Individually — one adjuster screw with its lock nut

How many you need: these engines have four valves, so four adjusters. Each unit here is one screw with its nut, so a complete set is four.

Valve Clearance Specs

Intake and exhaust run the same number on this family, set cold.

Model Intake Exhaust
CB175 / CL175 / SL175 0.05 mm (0.002 in.) 0.05 mm (0.002 in.)
CB200 / CL200 0.05 mm (0.002 in.) 0.05 mm (0.002 in.)

Installation

Difficulty: Intermediate

Tools needed: 3mm / 4mm square-head valve adjustment wrench, 8mm box wrench for the lock nut, feeler gauge

  1. Start cold. Pull the spark plugs, the tappet hole caps and the stator cover.
  2. Turn the crankshaft until the T mark lines up with the index mark on the stator, with that cylinder on its compression stroke. A finger over the plug hole tells you which stroke you are on — you will feel the air push out.
  3. Slide the feeler gauge between the rocker arm tip and the top of the valve stem.
  4. Break the lock nut loose with the 8mm wrench. The adjuster underneath has a square head, which is what the 3mm / 4mm wrench is for.
  5. Set the gap, then tighten the lock nut while holding the adjuster still. If the adjuster turns as the nut goes tight, the setting is gone.
  6. Re-check the gap once the nut is tight, then rotate the crankshaft 360 degrees and do the other cylinder.

Why a full turn between cylinders. The CB175 and CB200 use a 360-degree crankshaft, so both pistons rise and fall together. That is different from the 350, 360 and 450 twins, and it is why you go a full rotation rather than half.

The trick we use: rather than chasing a perfect 0.002 in. slip fit, set a 0.003 in. blade snug and err loose. If the gauge will not pull back out it is too tight; if it goes in with no drag at all it is too loose.

Related products