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Here is VC engine without cylinder head cover. You can clearly see that exhaust camshaft has only one cam per cylinder but intake camshaft has three cams per cylinder: primary wider cam for low&mid RPM mode and two secondary cams for high RPM mode. |
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Here you can see valve clearance adjustment in progress. Removed parts are all over garage floor. |
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One more view. |
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Here are valve shims. Primary shim from Bandit is on the right and secondary shim for high RPM rocker arm is on the left. The big one in the center is shim for Fiat Punto 1.1 engine - feel the difference :) |
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Here you can see that every intake valve in VC engine have two shims: one primary shim and one secondary shim. So we have total of 8 primary shims and 8 secondary shims. Exhaust valves have no shims, they are adjusted with screw and nut. By the way conventional Bandit 400 engine (non VC) has no shims at all, all 16 valves are adjusted with screw and nut. |
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This picture is here to shows how high RPM mode is activated. Mode 1 = low&mid RPM mode which is used from idle RMP up to 7800RPM. The engine is in Mode 1 when you first open it. Mode 2 = high RPM mode. It's used from 7800RPM up to RPM limiter. To measure gaps for secondary rocker arms you need to set the engine into Mode 2 manually. |
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The same picture, larger view. |
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This picture shows how to measure gaps for primary shims. Engine must be in Mode 1. |
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Here I switched engine into Mode 2 and blocked pinions by piece of wire to avoid moving back to Mode 1. |
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This picture shows how to measure gaps for secondary shims. Engine must be in Mode 2. |
