INNTECK Timing Chain for YAMAHA WRF 400, WRF 426, YZF 400, YZF 426 1998-2002

The INNTECK CD1024 timing chain is designed for YAMAHA WRF 400, WRF 426, YZF 400, YZF 426 from 1998 to 2002. The timing chain drives the camshafts from the crankshaft and keeps the valves in sync with the piston. As it stretches, it throws the valve timing out and pushes the tensioner to the end of its travel.

Specifications

• Brand: INNTECK
• Manufacturer part number: CD1024
• Engine: 4-stroke

When to replace it?

• Rattling or chain noise on the timing side, especially at idle.
• Tensioner at the end of its travel.
• Timing marks that no longer line up.

At the intervals in the service manual, and as soon as the tensioner reaches the end of its travel. Check the sprockets and the guides at the same time.

Fitting tips

1. Set the engine at top dead centre on the compression stroke, marks aligned, before removing anything.
2. On most motocross engines the chain is endless, with no master link: replacing it means removing the crankshaft sprocket or a camshaft, as described in the manual.
3. Line the camshafts up with their timing marks again, then put the tensioner back under tension.
4. Turn the engine over two full turns by hand and check the timing again before starting.
5. Refit with a valve cover gasket in good condition.

Spare parts and items to plan

• Cam chain tensioner : see the selection
• Valve cover gasket : ATHENA · CENTAURO
• Valve shims : MOOSE · PROX
• 4-stroke engine oil : MOTUL 10W50 · LIQUI MOLY 10W40 1 L

Frequently asked questions

Should I replace the tensioner?
Check it: a worn tensioner, or one at the end of its travel, must be replaced along with the chain.

Compatibility

Check the exact model and year of your bike in the list below before ordering.

Fits:
YAMAHA WRF 400 2000
YAMAHA WRF 400 1999
YAMAHA WRF 400 1998
YAMAHA WRF 426 2002
YAMAHA WRF 426 2001
YAMAHA YZF 400 1999
YAMAHA YZF 400 1998
YAMAHA YZF 426 2002
YAMAHA YZF 426 2001
YAMAHA YZF 426 2000