Royal Enfield Interceptor 650 - Service manual > Cylinder Barrel

Cylinder Barrel Bore ID

• Check cylinder bore to piston working area for scoring, seizure marks and/or excessive wear.
• Measure the cylinder bore at the top, middle and bottom at the rings working area using a bore gauge.
• Measure at both across and along the gudgeon pin axis.

Bore Taper Limit

• Measure the cylinder taper at three levels: Top (a), Middle (b), and Bottom (c) in the X and Y axis.

Piston OD

• Measure and record both LH and RH cylinder piston OD at three levels - Top, Middle, and Bottom using Micrometer.

Piston Pin Bore ID

• Measure both LH and RH cylinder piston pin bore (a) inner diameter using inside micrometer (b).

Piston Pin

• Measure the diameter of the piston pin (a).

Piston Ring End Gap

• Position the piston rings at their respective locations at the top of the cylinder barrel and ensure they are seated "squarely" inside the cylinder barrel.

• Measure piston rings end gap (a) using feeler gauge (b).

Crankcase

Connecting Rod Small End ID

• Measure the connecting rod small end inner diameter (a).

Connecting Rod Bend and Twist

• Support connecting rod suitably and firmly at the big end and measure bend/twist at the small end using a suitable scale.

Connecting Rod Journal Bearing Clearance.

• Measure clearance between crankshaft journal connecting rod big end and bearings.

Balancer Shaft Run-out

• Place the balancer shaft in V-blocks.
• Rotate the balancer shaft and measure run-out with a dial gauge at the machined surface (a) and (b).

Balancer Shaft Face Out

• Place the balancer shaft in V-blocks.
• Rotate the balancer shaft and measure the web face out with a dial gauge at the specified place (a) and (b).

Balancer Shaft Journal Bearing Clearance

• Measure the clearance between balancer shaft journal and balancer shaft journal bearing.

Crankshaft Face Out

• Place the crankshaft on V-blocks.
• Rotate crankshaft and measure face out with a dial gauge at the specified place.

Crankshaft Run-out

• Place the crankshaft on V-blocks.
• Rotate the crankshaft and measure run-out with a dial gauge at the machined surface.

Crankshaft Journal Bearing Clearance

• Measure crankshaft journal to crankshaft journal bearing clearance.

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