Classic & Motorcycle Mechanics CBX Stripdown

CBX Stripdown - page 4
(Vol. 51 - January 1992)

STRIPDOWN

THERE are four essential special tools you will need.
1: Primary gear holder. Part No 07924-422-0000.
2: Sprocket holder. Part No 07725-001-0101.
3: Engine stand (make it yourself - the genuine Honda one is about £100). Use 25x25mm square tube for the stand, 400mm long. Put two brackets on it 150mm apart, 60mm long, and drill two holes 40mm along the bracket. Holes are 10 mm diameter.
4: Clutch nut removal tool. Part 07916-422-0000.

Before you remove the engine put the bike on its sidestand when draining oil out because that drains the oil from the cylinder head and makes stripdown cleaner.
With the engine out of the frame, bolt the engine to the simple stand you have made up (see diagram opposite page). Without this little device the whole lot will constantly topple forward.
Start by removing the two bolts holding the rev counter drive (8 mm spanner). Use a good quality spanner or you will round off the edges (pic two). Remove the rev counter drive housing which should contain O-ring and oil seal (pic three).
Remove the rev counter drive gear (seen in picture three) and thrust washer. Often the thrust washer is missing. If your rev counter flutters about the omission of this washer is the probable cause. NB: If the rev counter drive is not removed at this stage there is every chance the cam cap will be broken when the cam cover is removed.
Remove the cam shaft end covers (pic four) using impact screwdriver if necessary. There are eight screws in total. Incidentally, it's a good idea to keep all cylinder head parts in a separate bag or box.
Remove the cam cover (pic five) by undoing the bolts evenly starting from the outside (10mm spanner). Loosen each slightly, then remove the central ones first. There are eight bolts in total, the long ones in the middle, the shorter ones outside.

Remove cam box rubber gasket. This can be re-used if in good condition (pic six).
Remove spark plugs (18 mm spanner) and inspect them. This engine showed every indication of running well, the plug colour on the porcelain being tan coloured. Plugs are NGK DR8ES-L R (resistor) with 0.6 - 0.7 mm gaps.
Inspect camshaft lobes. In this engine they are excellent - as good as you will ever find. This is what John expects to see from an engine that has had its engine oil regularly changed.

SECTION:	HOME PAGE	Whipping out the Engine	Preparation and top end strip	Starting on the Bottom End	Stripping the Bottom End	Putting it Together