1968

1968 T100R improvements included use of twin concentric carburettors & on some specifications the use of the 8" single leading shoe front brake.

Colour Aquamarine & Silver

1968 season bikes commenced with Engine number H57083 & saw the introduction of UNF threads on the front forks

Mid-season changes:

From Engine Number H57098: Blue-spot rear suspension dampers 29mm AHV

From Engine Number H57100: Increased thickness rocker boxes

From Engine Number H57470: Front fork sintered bronze bushes replaced the briefly used sintered iron bushes

From Engine Number H57842: Modified chain adjuster trunnion, shorter on left side

From Engine Number H58191: Permatex 300 gasket sealing compound introduced

From Engine Number H58797: Ignition location holes in crank flywheel changed to 15/64in diameter, Dunlop K70 tyre fitted on Tricor bikes, holes & grooves deleted from oil pump plungers (interim)

From Engine Number H58798: 12 point 'star' (UNF) nut used to secure cylinder barrels to crankcase

From Engine Number H60232: Knee grip rubber 'stick-on' material & thickness change

From Engine Number H60570: holes & grooves deleted from oil pump plungers (final)

From Engine Number H60620: Safety rail added to twinseat on JoMo bikes

From Engine Number H60832: ditto for TriCor bikes

From Engine Number H63307: Front fuel tank mountings: UNF studs & self-lock nuts (Cleveloc) replace bolts, oil tank & crankcase filter change to steel. Rocker oiling system: undrilled rocker arms & ball pins. 1/16in dia hole drilled in swingarm oil seal cover plate allows air to escape when greasing. 'Stat-o-seal' washer for petcock sealing. Cylinder head bolt torque 18lb-ft. Frnt fender lengthened on T100R. T100C coupled upswept exhaust pipes. Strengthened connecting rods. Felt lubrication wicks added to 6CA contact breaker. Exhaust cam taper amended to suit Lucas A/R unit

Between Engine Number H63307 to H63764: May be fitted with a 0.0015in oversize swingarm spindle.

Between Engine Number H63370 to H65056: Last of thin wall cylinder barrels used

From Engine Number H65011: Timing pointer added to primary chaincase & strobe mark on alternator rotor.

From Engine Number H65450: Battery vent tube secured with adhesive