If Abnormal Noises Are Heard In Engine; If Engine Overheats - Suzuki RV50 Service Manual

3. Check to see that engine
compression is correct
(Turn engine with kick
starter).

If Abnormal Noises Are Heard in Engine

If Engine Overheats

If engine overheats during high speed r unning after it is broken. in, check to see whether the oiling system is
in good condition, the brake is dragging, or cylinder cooling fins are dirty. Inspect the following points.
Description
1. Check to see if oiling system L Improperly adjusted oil pump
functions properly.
12
* If engine compression is low
1. Cylinder and piston rings worn
2. Piston rings stick on piston
3. Cylinder head gasket damaged·
4. Cylinder base gasket damaged
5. Piston damaged
6. Spark plug improperly tightened
7. Spark plug gasket faded
8. Cylinder head improperly tightened
9. Gas leakage from crankcase
10. Cylinder or cylinder head damaged
11. Oil seals damaged
Check Points
1. Too big a clearance between piston
and cylinder
2. Too big a clearance between piston rings
and grooves
3.
Piston rings stiff with carbon
4. Con-rod big end worn
5. Con-rod small end bearing worn
6. Piston rings damaged
7. Ignition timing too advanced
8. Defective primary pinion and gear
9. Crankshaft bearings worn
10. Defective transmission gear
11. Defective transmission bearings
Check Points
------- ---
control lever
2. Air in oil lines
3.
Oil tank breather pipe chocked
4.
Incorrect oil used
Repair or replace
Repair or replace
Replace
Replace
Replace
Tighten securely
Replace
Retighten securely
Repair or replace
Replace
I
Replace
Remedy
Repair or replace
Replace piston
Clean
Replace
Replace
Replace
Adjust
Replace
Replace
Replace
Replace
Remedy
-------- - --
Adjust
Remove air
Rectify
Use recommended oil