16
Spark plug
Maintaining the spark plug in good condition makes for reduced
fuel consumption and optimum engine performance. It is prefer-
able to remove the spark plug when the engine is hot (obvious-
ly after switching it off) as the carbon formation and the colour of
the insulator provide important information on carburation, lubri-
cation and the general condition of the engine.
NOTE:
spark plug is black: mixture is “rich”
spark plug is light brown: mixture is correct
spark plug is white: mixture is “lean”
To avoid serious hand burns, wear protective gloves and
perform the operation with great caution.
To perform the check, simply remove the spark plug cap and un-
screw the spark plug using the spanner provided. Carefully
clean the electrodes using a wire brush. Blow the spark plug
with compressed air to prevent any residues from getting into to
engine.
Using a thickness gauge, check that the spark gap is 0.6-0.7
mm. If necessary, correct the distance by bending the earth
electrode.
Also check that the insulator is not cracked and the electrodes
are not corroded. If that is the case, immediately replace the
spark plug.
Perform the check by referring to the indications provided in the
table Maintenance in Chapter 3.
Lubricate the spark plug thread and, when the engine is cold,
screw in the spark plug by hand until it stops and then tighten it
with the spanner.
NOTE:
Always use NGK DCPR 8 E spark plugs.
Workshop manual RR 4T - 400 - 450 - 525
04_Inghilterra_059311 27-12-2007 18:10 Pagina 16
Содержание RR 4T - 250
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Страница 5: ...Pag 5 GENERAL INFORMATION 1 01_Inghilterra_059311 27 12 2007 17 52 Pagina 5 ...
Страница 14: ...14 Workshop manual RR 4T 400 450 525 01_Inghilterra_059311 27 12 2007 17 52 Pagina 14 ...
Страница 15: ...SPECIAL TOOLS 2 02_Inghilterra_059311 27 12 2007 17 57 Pagina 1 ...
Страница 20: ...6 Workshop manual RR 4T 400 450 525 02_Inghilterra_059311 27 12 2007 17 57 Pagina 6 ...
Страница 21: ...TIGHTENING TORQUES SPECIFICATIONS RECOMMENDED PRODUCTS 3 03_Inghilterra_059311 27 12 2007 18 00 Pagina 1 ...
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Страница 31: ...MAINTENANCE 4 04_Inghilterra_059311 27 12 2007 18 10 Pagina 1 ...
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Страница 59: ...BODYWORK AND FITTINGS 5 05_Inghilterra_059311 27 12 2007 18 14 Pagina 1 ...
Страница 66: ...2 Workshop manual RR 4T 400 450 525 63_Inghilterra_059311 27 12 2007 18 17 Pagina 2 ...
Страница 67: ...ENGINE SECTION REMOVING THE ENGINE FROM THE VEHICLE 6 63_Inghilterra_059311 27 12 2007 18 17 Pagina 3 ...
Страница 77: ...Pag 13 ENGINE SECTION DISASSEMBLING THE ENGINE 6 64_Inghilterra_059311 27 12 2007 18 22 Pagina 13 ...
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Страница 91: ...Pag 27 ENGINE SECTION OVERHAULING THE ENGINE 6 65_Inghilterra_059311 27 12 2007 18 28 Pagina 27 ...
Страница 117: ...ENGINE SECTION REASSEMBLING THE ENGINE 6 66_Inghilterra_059311 27 12 2007 18 32 Pagina 53 ...
Страница 135: ...ENGINE SECTION INSTALLING THE ENGINE ON THE VEHICLE 6 67_Inghilterra_059311 27 12 2007 18 38 Pagina 71 ...
Страница 137: ...CARBURETTOR 7 07_Inghilterra_059311 27 12 2007 18 44 Pagina 1 ...
Страница 139: ...3 7 Carburettor Release 01 Date 09 2007 CARBURETTOR KEIHIN FCR M X 39 07_Inghilterra_059311 27 12 2007 18 44 Pagina 3 ...
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Страница 151: ...Pag 1 FRONT SUSPENSION WHEEL 8 08_Inghilterra_059311 27 12 2007 18 49 Pagina 1 ...
Страница 153: ...3 8 Front suspension wheel Release 01 Date 09 2007 08_Inghilterra_059311 27 12 2007 18 49 Pagina 3 ...
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Страница 169: ...Pag 1 REAR SUSPENSION WHEEL 9 09_Inghilterra_059311 27 12 2007 18 53 Pagina 1 ...
Страница 174: ...6 Workshop manual RR 4T 400 450 525 09_Inghilterra_059311 27 12 2007 18 53 Pagina 6 ...
Страница 175: ...Pag 1 BRAKING SYSTEM 10 10_Inghilterra_059311 27 12 2007 18 56 Pagina 1 ...
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Страница 183: ...Pag 1 ELECTRICAL SYSTEM 11 11_Inghilterra_059311 27 12 2007 18 59 Pagina 1 ...
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