Yamaha ttr230 User Manual

ENGINE
INSPECTION AND REPAIR
4-34
CAMSHAFT CHAIN, GEAR, CHAIN GUIDE
AND TENSIONER
Out of specification => Replace assembly.
2. Check:
• Rocker shaft hole 1
• Shaft contact surface 2
• Adjuster surface 3
Wear/dots/scratches/blue color =>
Replace and inspect the lubrication
system.
3. Measure:
• Shaft-rocker clearance
1. Check:
• Camshaft chain
Cracks/ warping => Replace chain and
gear.
2. Check:
• Camshaft gear
Damages/wear => Replace gear and
chain.
1 ¼ tooth
2 Correct
3 Link roller
4 Gear
Shaft-rocker clearance
0.009~0.037 mm
Shaft-rocker clearance =
Internal rocker diameter a
- External shaft diameter b

Yamaha ttr230 Specifications

General

Engine Type	223cc air-cooled SOHC 4-stroke; 2 valves
Bore x Stroke	70.0mm x 58.0mm
Compression Ratio	9.5:1
Ignition	CDI
Transmission	Constant-mesh 6-speed; multiplate wet clutch
Final Drive	Chain
Rear Suspension	Single shock; 8.7-in travel
Front Tire	80/100-21
Rear Tire	100/100-18
Length	81.3 in
Width	31.5 in
Seat Height	34.3 in
Wheelbase	54.5 in
Ground Clearance	11.6 in
Front Suspension	Telescopic fork
Rear Brake	Drum