working on an Iron head sportster.
You can add a 24020-51
left-hand thread screw to pinion shaft,
drill a n50 hole in screw
center, before installing it.
This will meter the oil flow
at any rpm range.
It will add more oil to the
top end for cooling and lubrication.
late model 24633-77 vent value to engine. this is a one-way
value it will help make more
power and run great.
a 1 ¾ ex value for more rpm and power, bore out ex port
in head for ex value flow.
Kibblewhite black value are the best.
Tulip shaped value head will
have up to 20% more flow.
Value coating with help stop
Stem galling and deposit build up.
Put seals on all kinds of
When using soft cast iron
guides and bronze guide, if they get worn.
You can always knurl i.d.
and rim to necessary size for clearance.
rocker arms shaft spring, make up and install a spacer
like in the shove head rocker
boxes. Set up end play at .020
ex rocker arm stem and spring oiling hole, you have to drill
through rocker arm and bushing
for positive oiling. A lot of oil hole
is blocked, by the bushing.
Rocker arm with oil hole is only for ex.
spring kit offers more seat pressure then stock spring set.
Kit .500 & .650 is good
Spring coil bind clearance
needs to be .100 more then cam lift
Remove bottom collar, use
spring head shim.
spring pocket cutters.
Need minimum of ½"
from top of guide to bottom of keeper groove.
left front bottom motor mount oil filter system and any
4-thing oil is design to
cleaner and cooler you can make the oil the better it will
for you. Filter oil first and then cool it.
a HI-4 crane ignition, a voes switch and duel 3 ohms coil,
on single fire.6k rpms 4 slope.