Manifolds, exhaust and emission control systems

All models utilise a light alloy inlet manifold which on carburettor models is coolant heated to improve the atomisation of the fuel/air mixture.

The exhaust manifold is of cast iron construction and incorporates a heated air box as part of the air inlet system on carburettor models.

See also:

Air Charge Temperature (ACT) sensor - removal and refitting
Removal 1 The ACT sensor is screwed into the CFI unit. 2 Disconnect the battery negative lead. 3 Remove the air cleaner assembly. 4 Disconnect the ACT sensor wiring plug (see illustration). 1 ...

Weber 2V carburettor automatic choke unit - adjustment
XR3 models 1 Remove the air cleaner as described in Section 2. 2 Disconnect the electrical lead to the automatic choke. 3 Unscrew and remove the three screws which hold the automatic choke housi ...

Speedometer cable - removal and refitting
Removal 1 On models fitted with a trip computer, remove the speed sender unit. 2 Remove the instrument panel. 3 Pull the cable through the bulkhead into the engine compartment, and where applicab ...