The first 65 sportster was supplied with the needle on the carburetor and then changed to a remote needle.

A bushing was added to the crankcase
on the later ones. These parts interchange.

The .65 had 15 head fins and diameter of 1.940"

Early models had deep fins on the head but it proved to be too much cooling so the fins were machined down then the mold was changed to reduce the fin depth.

Part No. 5800
New
Part No.
Old
Part No.
Description
10-5801
5801
Crankcase
11-5801
5816
Head
15-5801
-
Wrist pin w/teflon pads
16-5801
-
Connecting rod
17-5801
5851
Crankshaft
20-5801
-
Prop driver
21-5801
-
Back plate
21-5802
-
Radial mount back plate
24-4090
7832
Prop stud, nut, & washer
25-5801
-
Engine screw set (4 head screws & 4 back cover screws)
25-5831
6823
Muffler screws, 2 each (NOTE: early 65 used longer screws)
26-5801
-
Teflon pads for wrist pins
27-5811
-
O-ring head seal (early model)
27-5880
-
Mixture disk O-ring set
27-5881
-
Carburetor neck O-ring
28-8701
-
Carb draw bar
29-5821
-
Back cover gasket
30-5801
-
Muffler complete with adaptor & screws
30-5890
5810
Muffler body, caps & baffle with stud & nut
30-5891
5811
Muffler Adapter -- old number is 5820
30-5892
5839
Muffler caps & stud kit
30-5893
-
Muffler baffle tube assembly
33-5801
5802
Cylinder & piston
80-5801
5850
K&B Carburetor w/needle attached
(Carburetor complete w/main needle attached)
80-5802
5870
K&B carburetor for remote needle
-
5832
Carburetor body & barrel
83-5622
5622
Carburetor control arm
85-5801
5836
Low Speed Disc w/2 O-ring (needle on carb style)
85-5802
9176
Low Speed Disc w/2 O-ring (remote needle style)
87-5665
5665
Needle valve assembly (on carburetor type)
9255
9255
Remote Needle Valve Assembly
 

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K&B and the oval logo are Registered Trademarks of Model Engine Corp. of America
Registered U.S. Patent Office

No part may be reproduced without written permission from
MECOA/K&B -- P.O. Box 5 -- Sierra Madre, CA 91025 U.S.A.