Valve and springs check (Aprilia Shiver 750)

0

Caution! Replace the valves one at a time. Do not mix the components. each valve must be inserted into its seat, which is marked prior to removal.

Caution!

• The seat (1) on the valve head cannot be reground. if required, replace the valve.
• Grinding with abrasive paste is allowed; valve stem end regrinding is not allowed.

Clean off any combustion residues from the valves.

Check the seat (1) on the valve head with a ruler flush.

The surface of the seat must not be concave; replace the valve if necessary.

Check the clearance between the stem and the valve guide:

• inlet: 0.013 - 0.040 mm (0.00051 - 0.00157 in);
• limit: 0.080 mm (0.00315 in)
• outlet: 0.025 - 0.052 mm (0.00098 - 0.00205 in);
• limit: 0.100 mm (0.00394 in)

Check the valve eccentricity:

• valve stem (3) maximum eccentricity allowed: 0.05 mm (0.00197 in)
• valve head (4) maximum eccentricity allowed: 0.05 mm (0.00197 in)

Check that the fixing grooves (5) of the valve cotters are in proper conditions.

Valve springs

Carry out a measurement and a visual inspection of the valve springs for damage, distortion or loss of tension.


Measure the spring length at release position.

• Valve springs: minimum wear limit (6) 42.5 mm (1.673 in).
• Valve springs: minimum wear limit (7) 38 mm (1.496 in).

See this article in russian language

Removing the valves and valve springs Yamaha FZ1 Fazer (2006-2015)
Fuel cut valve — operation check Kawasaki ZX6R/ZX600J (2000-2002)
Relief valve check Honda VTX 1800 C (2001-2008)
Checking valve clearances Ducati ST2 (1997-2003)
Valve clearances Triumph Rocket III (2004-2018)

Article about repair motorcycles «Aprilia Shiver SL 750» (2007-2016): «Valve and springs check»: https://motoinstruction.ru/en/Aprilia/Shiver/SL750/engine/repair/114599 <a href="https://motoinstruction.ru/en/Aprilia/Shiver/SL750/engine/repair/114599">Valve and springs check</a> - article about repair motorcycles «Aprilia Shiver SL 750» (2007-2016) from section «Engine repair». [url=https://motoinstruction.ru/en/Aprilia/Shiver/SL750/engine/repair/114599]Valve and springs check[/url] - article about repair motorcycles «Aprilia Shiver SL 750» (2007-2016) from section «Engine repair».