7. Crankcase mods for racing.
Metal has to be removed in the camfollower block bores this is because unlike triumph they are on an angle and need a bit of meat removing. Once the barrel goes on, temporarily put in the cam followers and make sure they are free to do their thing without binding or jamming.

brick on a stickbri

Cams supplied by nourish racing are z cam inlet and 320 deg exhaust. Dave advised me that should give the results i was looking for.I.E. mid range to top end grunt , torque over the range without a kick at top end.However these "hairy" cams are significantly bigger than the triumph ones and bigger than the clearance in the cases subsequently they bloody well wont revolve. Tip if you dont have one already buy a rotary grinder.Its like a big dremmel. Using the grinder i releived the cases intil the cams did revolve.

Subtle relife gives the cams a bit of elbow room.

Once all the grinding has been finaly sorted time to put the new bearings in. When heated the cases expand more than the old bearings. So simply heat up cases then pick up 6 inches or so and drop onto wooden surface. The old bearing drop out. while the heat is still in the cases quickly remove your new bearings from the freezer (having unwrapped them and deposited them at least half hour previously) they should just plop into place.