Proper piston-to-valve clearance is especially critical in applications with high-compression pistons, large-duration cams, and high rpm. For these reasons, it’s imperative to check piston-to-valve clearance whenever an engine is built, or either the cylinder heads or valvetrain are changed. In order to check clearance, you will need Play Doh, or similar modeling clay, an inexpensive dial caliper and a pair of solid lifters. Add 0.030 inches of minimum clearance to each valve if the engine is equipped with aluminum rods since they tend to stretch more than steel.
Most piston to valve issues happen at 10 degrees before top dead center (BTDC) A handful of Play Doh, or similar modeling clay, is flattened out across the valve reliefs on top of the pistons (about 1/4-inch thick). This will be one complete revolution of the camshaft (the cam spins half the speed of the crank) and assure you of an accurate impression in the clay from both the intake and exhaust valve. With a razor blade or knife, cut the clay in the middle of each valve relief and peel one half off the piston top.
2015 Honda BeAT FI Technical Specifications
On the topic of chassis characteristics, responsible for road holding, handling behavior and ride comfort, the Honda BeAT FI has a Backbone frame with front suspension being Telescopic fork and at the rear, it is equipped with Mono Shock – Unit Swing .
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