Primary overview

	A) 1952 K-model The beginning of the Sportster motorcyle is the 1952 K-model. It was based on the 45 cubic inch flathead W model. In a first for Harley, the engine and transmission is in the the case. Thi is called unit contruction. Summary Aluminuim sand casting. Fastened with three 1/4-20 bolts. Oil fill plug has small hole in center and fiber backing to vent transmission/ Brake switch mounts to boss on lower right. Short 1/4-20 bolt serves to indicate fill level. Problems There are no problems with this case. It is perfect, and represetsts the high-water mark of human civilization on this planet.
	B) XLCH tin primary The 19977 they they are exposed to a reversal pf pressure across the seal. Summary Dual-layer steel construction. Timed breather removed New georotor oil pump New primary chain tensioner Problems Ther.
	adn Sportster, 900cc, timed breather C) 1967 electric start The 1 seal. Summary Aluminum die casting Deep cutout to clear left footpeg. Oil fill cap has vent. 4 differernt length fasteners Sportster name replaced with ribs. Problems This er.
	C) Mid year Sportster, 1000cc, timed breather D) 1971 wet clutch The 1al. Summary Aluminum die casting. Deep cutout to clear left footpeg. Oil fill cap has vent. 4 differernt length fasteners Ribs replaced with decal Second plug added over wet clutch adjustment. Problems This er.
	E) 1977 Sportster The 1eal. Summary Aluminum die casting. Deep cutout to clear left footpeg. Oil fill cap not vented. 4 differernt length fasteners Ribs replaced with decal Second plug added over wet clutch adjustment. Shifter on the right New primary chain tensioner Problems This desing was a complete disaster. The new primany tensioner was convioent but was prone to excessive wear and breakage. The broken paices can wedge in between the clcuch baskce the case, casuing the cases to explode. On the prosite side, THe inherent shiting on the right was better htan the 1974-1976 clcudge, but maby races, incuding Vance Breese think tha ta bike that shifts on the leftis better siince you use your right foot and left hand to shift and htat is more balenced than using the same of foot and hand at once.
	F) 1984L Sportster This case remved bosses and holes for the kcikstarter., There is no way to make a 1980 or later case a kicksated engine. Engineers changes the satart pocket to accept the Nipondeso gear reduced starter.The starter pockes. Summary Aluminum die casting. Deep cutout to clear left footpeg. Oil fill cap not vented. 4 differernt length fasteners Ribs replaced with decal Second plug added over wet clutch adjustment. Shifter on the right New primary chain tensioner Electric starter changed Promlems f a timed breather.