
Danger
CautionCaution
CautionCaution
CautionCaution
CautionCaution
An arrow marked 1 on the exhaust cam sprocket and the cam chain pin should
point flush with cylinder head gasket surface (See Fig.1 and Enlarged Fig. of A)
INTAKE: 0.20
EXHAUST: 0.20
Break-in
Tappet Clearances with Engine Cold
Tappet clearances must be adjusted to the specifications supplied below.
The starter motor must be used intermittently to prevent starter motor damage.
During the break-in procedure, heavy loading action such as sudden starts and
rapid acceleration should be avoided.
During normal start-up after camshaft break-in has been completed engine oil
must reach normal operating temperature before applying load to the engine.
1. Put in a specified amount of new engine oil.
(Reference) Use engine oil higher than API-SF grade and SAE 10W-40~15W-50.
2. With the spark plugs removed spin the crankshaft to lubricate the engine by using the electric starter.
3. Leave the machine for several minutes and check the oil level. If the level is low add suitable amount of oil.
4. Install the spark plugs.
5. Start the engine. Inspect work for oil leakage. Once the engine has reached operating temperature adjust idle.
6. Up to 100km, engine RPM should not exceed 4000RPM
7. Until 200km, engine should not exceed 5000RPM, and up to 300km engine RPM should not exceed 6000RPM.
8. Once the break-in procedure has been completed, check tappet clearances and adjust as necessary. Check that
there are not irregular noises from the engine. If an irregular sound is heard disassemble the engine and inspect.
After the installation
Quality control is implemented in all products. If, however,
any defects or failure should be found please notify
Yoshimura Japan (Yoshimura-RD in the US) through the
selling dealer. Necessary technical service or replacement
will be made. Prices and Specifications are subject to
change without notice.
YOSHIMURA JAPAN Co., LTD
6748 Nakatu, Aikawa, Aiko, Kanagawa 243-0303 Japan
Phone +81-46-286-0321 FAX +81-46-286-1919
YOSHIMURA-RD of America Inc.
5420 Daniels Street Suite A, Chino, CA 91786
Phone 1-800-634-9166 FAX 909/591-2198
Enlargement of Fig. Of A