ENGINE TUNE-UP - Comp ress ion Pressu re 2 -15 Fig. 2-52 4. Check the engine speed. If not at spe cif ied rpm, adjust by turn ing the TP adjusti ng screw. TP setting speed 1200 rpm I Fig. 2-53 Reconnect the TP diaphragm ho se. Open thr ott le valve slightly and release it. Engine should r eturn to id Ie speed. ~ ~ : Fig, 2 -54 COMPRESSION PRESSURE EJ 1. Warm up the engine. 2. Remove all spark pl ugs. 3. Disconnect the h igh tension cord fro m igni tion coil to cut-o ff the secondary circuit. Fig, 2-55 I nsert a compr essi on gauge into the spark ~ 4 . plug hole, open the th r ottl e valve fu lly, and measure the compression pressure while cranking the engine with starter moto r.
Compression Pressure 10.5 kg/cm 2 (149.3 psi) Limit 8.0 kg/cm 2 (113.8 psi) (at 200 rpm)