jjacob
Member
UPDATE
Both engine and transmission have been completely stripped.
ENGINE
The engine I am rebuilding is a very late 650 (1987-88?) with the wasted spark ignition (distributor, but no cap and a dual outlet coil). Engine condition is very good, only found the following worn out on engine.
-Oil pump gears show 0.4mm (0.016in) backlash between gears, should be 0.15mm (0.006in).
-Camshaft has one lobe that is excessively worn.
Rest of the engine is in great shape. Looks like oil was changed often as there is virtually no scoring anywhere.
-Going to reuse the pistons and cylinders and just hone.
-New rings
-0.5mm copper head gasket
-New 30/70-70/30 camshaft and cam followers.
-New rod and main bearings
-New oil pump gears
-34mm intake valves, stock exhaust valves, new guides and springs. Will have the cylinder head rebuilt with hardened valve seats and I will do a little mild porting and polishing. Will have the head ever so slightly skimmed to true up.
Will install an oil filter and cooler arrangement. Not sure how I want to do this. I'll make a separate post to discuss this.
TRANSMISSION
Transmission looks very good. Zero play in all gears and axles, nice and tight. Shows typical wear and chips on first and reverse and the layshaft.
-install new 3 gear kit
-new clutch kit
Much thanks to all those who came before me. I have read your valuable posts which help. Special thanks to Tom - The Hobbler, whom emailed me multiple times giving the best of advice and information.
John
Both engine and transmission have been completely stripped.
ENGINE
The engine I am rebuilding is a very late 650 (1987-88?) with the wasted spark ignition (distributor, but no cap and a dual outlet coil). Engine condition is very good, only found the following worn out on engine.
-Oil pump gears show 0.4mm (0.016in) backlash between gears, should be 0.15mm (0.006in).
-Camshaft has one lobe that is excessively worn.
Rest of the engine is in great shape. Looks like oil was changed often as there is virtually no scoring anywhere.
-Going to reuse the pistons and cylinders and just hone.
-New rings
-0.5mm copper head gasket
-New 30/70-70/30 camshaft and cam followers.
-New rod and main bearings
-New oil pump gears
-34mm intake valves, stock exhaust valves, new guides and springs. Will have the cylinder head rebuilt with hardened valve seats and I will do a little mild porting and polishing. Will have the head ever so slightly skimmed to true up.
Will install an oil filter and cooler arrangement. Not sure how I want to do this. I'll make a separate post to discuss this.
TRANSMISSION
Transmission looks very good. Zero play in all gears and axles, nice and tight. Shows typical wear and chips on first and reverse and the layshaft.
-install new 3 gear kit
-new clutch kit
Much thanks to all those who came before me. I have read your valuable posts which help. Special thanks to Tom - The Hobbler, whom emailed me multiple times giving the best of advice and information.
John
Last edited: