Baker Drivetrain Tin Type Primary Installation Instructions

Baker Drivetrain Tin type Primary

Features

Billet 6061-T6 aluminum inner and outer primary housings available in steel shot blasted or show polished finish
Available in kick only and 1.4kw 1990-2006 style starter configuration
Starter type includes jackshaft and related hardware
Modern chain fine tooth adjuster shoe and L-bracket included
O-ring sealed locking flanged nuts for transmission-to-inner primary studs
Nostalgic slotted screws, gasket, and related hardware included
Zero Leak drain plug with magnet standard
Chain oiler and suction hardware included
Inner primary is reinforced for strength around the mainshaft bore
Works with stock style derby and inspection covers

Optional Related Hardware

Aluminum Derby and Inspection cover kit, pn3102-TTP-P Show Polished and pn3102-TTP-R Shot Blasted
Splined 4-Speed mainshaft and Splined Shovel Clutch (diaphragm type), recommended for 93+” motors, pn9P401
Clutch release arm kit, pnTTP-200A (use with stock style mechanical cable)

Fitment

1970-E84 Shovelhead® 4 Speeds
BAKER 6N4
Custom Applications (Alternator/Stator Motors)
Not Compatible With Factory Mid Controls

Tools, Resources, Required Parts

Factory Service Manual For Your Motorcycle
Factory Parts Manual For Your Motorcycle
Common Hand Tools (Allen Wrenches, Sockets, Screwdrivers etc.)
½” Impact Gun, 1 1/2” Socket (Motor), 1 7/16” and 1 3/16” Socket (Clutch)
Torque Wrench (ft-lbs. and in-lbs.)
Clutch Hub Puller, pn 95960-41A or Equivalent
Dial Calipers or Equivalent (Chain Alignment)
Straight Edge (Chain Alignment)
Blue Loctite® (242 Removable) or Equivalent
Red Loctite® (271 Permanent) or Equivalent
Permatex® Silicone Sealant or Equivalent
Pipe Thread Sealant (Loctite® 567) or Equivalent
Motor O-Ring (pn11147A)
Motor Sprocket Kit with Shims (1955-64 Splined Non-Compensator)
1990-2006 1.4kw H-D® Starter pn 31553-94B (Starter Versions Only); With New Cable & Boot

TIN TYPE PRIMARY MAINSHAFT DIAMETERS

TTP Part Number And Fitment For Mainshaft Diameters

TTP Part Numbers for the old style 6N4 with the .983” diameter mainshaft:

PN 3100-TTP-R-6N4, Media blasted TTP assembly w/ hardware, Kick Only -6N4 w/ .983” Shaft
PN 3100-TTP-P-6N4, Show polished TTP assembly w/ hardware, Kick Only -6N4 w/ .983” Shaft
PN 3101-TTPS-R-6N4, Media blasted TTP assembly w/ hardware, Starter Version -6N4 w/ .983” Shaft
PN 3101-TTPS-P-6N4, Show polished TTP assembly w/ hardware, Starter Version -6N4 w/ .983” Shaft

TTP bearing & seal placement for the current, 1.000” diameter and .983” diameter mainshafts:

4-SPEED AND NEW STYLE 6N4 W/ 1.000” MAINSHAFT R16DDUCE BEARING, 200 RRRI SNAP RING AND 56-5101 SEAL

OLD 6N4 W/ .983” MAINSHAFT 16005 BEARING, 56-1068A ADAPTER SLEEVE, NO SNAP RING AND 56-5101 SEAL

Old .983” & Current 1.000” diameter mainshaft images:

Note:

We had a couple part numbers for the stepped .983″ mainshaft; PN 996040-8 & PN 6N4-70xxxx. (xxxx= month / year). The last stepped .983″ mainshaft were made in 2008 (PN 6N4-70xx08).

EXPLODED VIEW, TTP STARTER VERSION

Starter Version Shown; Figure 1

ITEM	QTY	PN	DESCRIPTION
1	$	60645-GAS	Gasket, Inspection Cover
2	$	60572-36	Inspection Cover
3	10	91790A539	1/4-20 X .625” Oval Screw S.S.
4	$	60555-36	Derby Cover
5	$	60640-GAS	Gasket, Derby Cover
6	10	91790A542	1/4-20 X 1.000” Oval Screw S.S.
7	1	60510-S36	Outer Primary
8	1	60635S-GAS	Gasket, Primary
9	1	5304-37PP	E-Clip, 3/8”
10	1	39976-01	Shoe, Tensioner
11	1	3068-DSSC	Tensioner L-Bracket
12	1	37024	3/8-16 Nylock Nut
13	1	33082	Washer, 3/8”
14	2	31C75KFC	5/16-18 X .750 FHCS Black
15	1	3069-DSSC	Tensioner Plate
16	1	21818	3/8-16 X 1.250” Bolt
17	2	31C100KCSS/P	5/16-18 X 1.000” SHCS S.S.
18	1	91030A455	Flanged Motor Nut
19	2	26751	1/4" X .750” Solid Dowel
20	2	ZPN292216	Lock Tab
21	2	13056	5/16-18 X 1.125” Hex Bolt
22	1	5346K15	1/8” NPT Barb Fitting
23	1	99-1058	Splined Washer, Starter Jackshaft
24	1	54446-004	Spring, Starter Jackshaft
25	1	732407-E	9 Tooth Starter Jackshaft
26	1	25C50HFB8Z	1/4-20 X .500” Hex Bolt W/Flange
27	1	.203x.546x.048N	Washer, Starter Bolt
28	1	10F50KCS	10-32 X .500” SHCS Black
29	1	37KKPFS	3/8-18 Socket Pipe Plug
30	4	37FNGFOC	3/8-24 Locking Flanged Nut
31	1	22H-S05M-CLR	1/2-20 Hex Zero Leak with Magnet
32	4	2418T135	O-Ring, Buna -110
33	1	60625-S36	Inner Primary
34	2	31588	1/8” NPT Plug
35	2	63533-41A	1/8” NPT Nipple
36	*	R16DDUCE	Bearing, Inner Primary
36	*	16005 / 56-1068A	Bearing & Adapter, Primary (Old 6N4 Only)
37	1	200RRRI	2” Internal Snap Ring
38	1	56-5101	Seal, Inner Primary
39	1	37R75PDO	3/8” X .750” Solid Dowel
40	1	PAP2525P10	Permaglide Bearing
41	1	25R100PDP	1/4" X 1.000” Dowel
42	1	12035B	Oil Seal, Starter Jackshaft
43	1	TTP-125	Collar, Starter Jackshaft
44	1	60630-S36	Starter Ear Standoff
45	1	31R100PDOS	5/16” X 1.000” Solid Dowel
46	2	31C175KCSS/P	5/16-18 X 1.750” SHCS S.S.
47	2	31C125KCSS/P	5/16-18 X 1.250” SHCS S.S.
48	2	6100	5/16” Washer
49	1	9213K17	1/4-20, 1” H, 1” W – Dampener
50	3	9213K14	1/4-20, ½” H, 1” W – Dampener

Note:

Add a “P” and the end of the part number for polished parts or an “R” at the end for raw blasted parts. Example: 60630-S36P (polished starter ear standoff). Item # 37 does not come in the kit if you are using with an old style 6N4 transmission with a .983” stepped mainshaft.
* = Customer preference; if you are using on a 4-Speed, 6N4 Transmission or old style 6N4 with .983” mainshaft.
$ = The Derby and Inspection Cover kit is sold separately (pn 3102-TTP-P / 3102-TTP-R).

EXPLODED VIEW, TTP KICK VERSION

Kicker Version Shown; Figure 2

ITEM	QTY	PN	DESCRIPTION
1	$	60645-GAS	Gasket, Inspection Cover
2	$	60572-36	Inspection Cover
3	10	91790A539	1/4-20 X .625” Oval Screw S.S.
4	$	60555-36	Derby Cover
5	$	60640-GAS	Gasket, Derby Cover
6	10	91790A542	1/4-20 X 1.000” Oval Screw S.S.
7	1	60505-K36	Outer Primary
8	1	60650K-GAS	Gasket, Primary
9	1	5304-37PP	E-Clip, 3/8”
10	1	39976-01	Shoe, Tensioner
11	1	3068-DSSC	Tensioner L-Bracket
12	1	37024	3/8-16 Nylock Nut
13	1	33082	Washer, 3/8”
14	2	31C75KFC	5/16-18 X .750 FHCS Black
15	1	3069-DSSC	Tensioner Plate
16	1	21818	3/8-16 X 1.250” Bolt
17	2	31C100KCSS/P	5/16-18 X 1.000” SHCS S.S.
18	1	91030A455	Flanged Motor Nut
19	2	26751	1/4" X .750” Solid Dowel
20	2	13056	5/16-18 X 1.125” Hex Bolt
21	2	ZPN292216	Lock Tab
22	1	5346K15	1/8” NPT Barb Fitting
23	4	37FNGFOC	3/8-24 Locking Flanged Nut
24	4	2418T135	O-Ring, Buna -110
25	1	22H-S05M-CLR	1/2-20 Hex Zero Leak with Magnet
26	1	60620-K36	Inner Primary
27	2	31588	1/8” NPT Plug
28	2	63533-41A	1/8” NPT Nipple
29	*	R16DDUCE	Bearing, Inner Primary
29	*	16005 / 56-1068A	Bearing & Adapter, Primary (Old 6N4 Only)
30	1	200RRRI	2” Internal Snap Ring
31	1	56-5101	Seal, Inner Primary

Note

Add a “P” and the end of the part number for polished parts or an “R” at the end for raw blasted parts. Example: 60630-S36P (polished starter ear standoff). Item # 30 does not come in the kit if you are using with an old style 6N4 transmission with a .983” stepped mainshaft.
* = Customer preference; if you are using on a 4-Speed, 6N4 Transmission or old style 6N4 with .983” mainshaft.
$ = The Derby and Inspection Cover kit is sold separately (pn 3102-TTP-P / 3102-TTP-R)

Tin Primery Type Preparation

Dissasembly

1. Starting with the basics and for your safety, DISCONNECT BOTH BATTERY TERMINALS (FAILURE TO DUE SO COULD RESULT IN PERSONAL INJURY). Always disconnect the negative terminal first.

2. Remove the battery, battery tray and then drain your primary and oil tank. On some models it is necessary to remove foot pegs / floor boards in order to remove the outer primary.

Removing Clutch Hub Assembly | Figure 3

3. Remove your stock outer primary cover; refer to your Factory Service Manual to remove your stock clutch assembly and related primary components using the proper safety precautions and tools. Clutch hub puller tool pn 95960-41A is used to remove the clutch hub off of the transmission shaft, figure 3

4. Remove the oil tank, starter and inner primary following your Factory Service Manual.

5. Loosen your transmission mounting plate nuts.

6. With all these components removed your bike should like figure 4.

Striped Down | Figure 4

Tin Type Primary Prep:

BAKER DRIVETRAIN SHIPS THE TTP READY TO INSTALL WITH THE OIL DRIP AND RETURN LINE FITTINGS. RUN THE TTP LIKE A MODERN WET PRIMARY FOLLOW STEPS 3 - 6.

1. The TTP “Tin Type Primary” is shipped assembled; if you purchased the cover kit, remove the derby, inspection covers and then outer primary cover with gaskets.

2. The inner primary has the mainshaft bearing, seal and chain tensioner assembly installed, if you have a starter version TTP the starter ear standoff, permaglide, seal and collar are installed and ready for installation; no disassembly of these items are necessary

Steps 3 – 6 are for running the primary like a sealed modern wet setup

3. Remove the 1/8” NPT line fittings from the back of the inner primary. For your reference refer to Figure 1 or 2.

4. Install the two 1/8” NPT plugs (pn 31588) using pipe thread sealant; snug both plugs. Figure 5 shows the primary with plugs installed.

1/8” NPT Plugs Installed | Figure 5

5. Remove the 1/8” NPT barb fitting (pn 5346K15) on the inside, inner primary, for your reference refer to Figure 1 or 2.

6. The primary will vent through the transmission like a stock 5-speed setup. If you have a clutch nut with a seal installed, the seal must be removed also a flat (length wise) on the release rod added (like a 5-speed clutch release rod). This will ensure proper venting of the primary by letting air to pass through the mainshaft.

Tin Type Primary Installation

Primary Installation:

1. Clean the motor O-Ring area making sure it is free of debris and oil using brake cleaner or equivalent; install the new motor O-Ring.

2. Lubricate the mainshaft seal on the back of the inner primary with a little bit of motor oil or primary fluid.

Plug Off Dripper Line | Figure 6

IF YOU ARE RUNNING THE STOCK OIL DRIP AND RETURN LINES FOLLOW STEPS 3 – 5. PROCEED TO STEP 6 IF YOU ARE RUNNING THE TTP AS A MODERN WET PRIMARY.

3. Plug off / shut off the oil drip feed from your oil pump following your Factory Service Manual. The oil pump dripper feed will no longer be used to oil your primary. There are two ways to do this; pinch and solder the end to seal it off or heat up the dripper nipple and pull it out of the oil pump then tap the hole using a 1/4-28 and installed a 1/4-28 set screw, figure 6.

T Fitting Installed | Figure 7

4. Route the breather “T” line off of the motor, “T” goes in between the motor and oil tank which is routed to the TTP chain dripper, figure 7. Tighten the line to the inner primary first.

5. Install the inner primary onto the motor and transmission, routing the dripper line to the “T” fitting.

6. Install the rear suction line to the primary and secure both the suction and dripper line using a hose clamp.

7. Install the four O-Rings (pn2418T135) provided over the transmission studs; push the O-Rings on until they are seated into the inner primary pockets.

8. Using blue Loctite® install the motor bolts, lock tabs and self locking transmission flanged nuts; snug.

9. Torque the primary down following the sequence shown in figure 8. Torque motor bolts to 200-220 in-lbs and the transmission to 33-38 ft-lbs.

10. Check to see if the transmission needs to be shimmed using feeler gages; if there is a gap between the transmission case and the mounting plate shims must be installed to maintain proper alignment.

11. Torque transmission mounting plate bolts to 33-38 ft-lbs.

Torque Sequence| Figure 8

For Starter Version Primaries Only

If you’re using a stock oil tank setup there are a few steps that need to be taken so you can mount up your starter.

1. Remove the stock oil tank dampener mounts from the frame and battery box. BAKER supplies new dampeners that move the oil tank to the right an ¼” for starter clearance, figure 9.

Stock Shown With 2 New | Figure 9

2. Install the new dampeners; two ½” long dampeners go on the left side of the frame, one 1” long dampener goes on the right. The extra ½” long dampener mounts to the battery tray.

Tapping Out Connector | FIGURE 10

3. The 1.4kw H-D® starter will have to be modified by turning the solenoid connector 90 degrees clockwise.

Connector Rotated 90 | Figure 11

Remove the starter end cap and plunger. The connector body is a press fit into the housing so some slight heat on the housing might be required (DO NOT HEAT THE CONNECTOR, SHIELD IT WITH A PIECE OF METAL).
Using a small punch and mallet gingerly tap from the inside out. Once popped out, rotate 90 degrees and reinstall the connector using a rubber mallet and some patience, tap into place until the connector is seated. Refer to figures 10 and 11.
Re-install the plunger and push it in all the way; make sure that the plunger does not contact the connector wires, if it does lightly bend out of the way.
Re-install the cap with seal using blue Loctite® , snug bolts.

TAKE YOUR TIME WHILE REMOVING AND ROTATING THE SOLENOID CONNECTOR. DO NOT FORCE TO ROTATE THE 90 DEGREES AS IT WILL BREAK. DO NOT OVER TIGHTEN THE CAP SCREWS AS THEY WILL BREAK.

4. Install the splined washer (pn99-1058) onto the starter splined shaft, then the jackshaft spring (pn54446-004) onto the starter splined shaft.

5. Slide the jackshaft collar (pnTTP-125) into the inner primary starter ear, figure 12.

Collar Installation | Figure 12

6. Install the starter assembly using two 5/16-18 X 1.250” and washers (pn31C125KCSS/P and pn6100) with blue Loctite®, be careful not to drop the spring and splined washer off of the starter shaft while sliding into position. Just snug the bolts for now

7. Apply a small amount of oil around the starter jackshaft (pn 732407-E); install the jackshaft through the inner primary into the starter. You might have to spin the jackshaft around to line up the splines so the jackshaft goes onto the starter and fully seats.

8. Once the jackshaft is seated install the provided 10-32 X .500” with washer (pn10F50KCS and pn.203x.546x.048N) or 1/4-20 X .500” (pn25C50HFB8Z) with blue Loctite® . Holding the jackshaft with a pair of pliers, torque bolt to 60-80 in-lbs.

9. With the jackshaft in place torque the starter bolts to 200-220in-lbs.

CHECK TO MAKE SURE THAT AFTER THE JACKSHAFT IS INSTALLED AND THE STARTER IS TORQUED THAT IT PULLS OUT, SPINS FREELY AND SNAPS BACK INTO POSITION. IF THE SHAFT BINDS OR WILL NOT PULL OUT FREELY IT WILL NOT FUNCTION PROPERLY. THIS CAN CAUSE COMPONENT DAMAGE; THIS IS COMMON ON SOME CHROME STARTERS DUE TO CHROME BUILD UP ON THE STARTER FLANGE. SOME CHROME STARTERS NEED TO BE SANDED TO REMOVE CHROME BUILD UP BEFORE THEY WILL FIT CORRECTLY.

10. After you verified that the jackshaft functions properly, install the 3/8” pipe plug (pn 37KKPFS) using pipe thread sealant and snug.

11. If you are using the stock mechanical clutch cable and lever setup you must:

Ferrule Installation | Figure 13

Remove the stock release arm and replace with BAKER pnTTP-200A (sold separately).
Install the BAKER release arm, then slide on the cable extension ferrule (comes in the kit pn TTP-200A), figure 13 and hook up the cable to the new arm. Hold off on adjustment at this time.

Primary Installation Cont:

12. Install the new motor sprocket and shims (must be purchased separately) along with clutch and chain. A 24 tooth motor sprocket is the maximum size that will fit the TTP.

CHECK THE PRIMARY CHAIN ALIGNMENT TO ENSURE CHAIN LIFE AND PREVENT COMPONENT FAILURE. CHAIN ALIGNMENT MUST BE WITHIN .:3:” (0.76MM) FOR PROPER ALIGNMENT.

Chain Aligment

With the clutch, chain and sprocket installed; install the clutch nut and flanged motor nut (pn 91030A455); snug at this time.
Snug the chain adjustment so that the chain is taunt.

Checking Chain Aligment | Figure 14

Place a straightedge across the chain sideplates. With a dial caliper, measure the distance from the straightedge to the gasket surface of the inner primary. When taking the measurement, measure as close to the motor sprocket as possible. Record this measurement. Figure 14
Repeat the procedure near the clutch sprocket.

The two measurements taken will be the spacer thickness needed or subtracted (if required). H-D® offers a wide range of motor sprocket spacers to accommodate your needs.

If you are within the .030” of chain alignment, loosen your chain, remove the flanged motor sprocket nut and clutch nut.

13. Clean the threads on the clutch and motor nut using brake cleaner or lacquer to ensure they are free of oil.

14. Install motor sprocket nut and clutch nut using red Loctite® .

15. Torque to Factory specifications following your Factory Service Manual.

PRIMARY CHAIN MUST BE ADJUSTED AT THE TIGHTEST SPOT IN THE CHAIN, ROTATE THE MOTOR AROUND TO FIND THIS SWEET (TIGHTEST) SPOT. ADJUSTING THE CHAIN TIGHTER THEN SPECIFIED WILL RESULT IN EXCESSIVE WEAR. ALL MEASUREMENTS ARE TAKEN FROM THE UPPER STRAND IN THE MIDDLE OF THE CHAIN, BETWEEN THE MOTOR AND CLUTCH SPROCKET.

16. Adjust primary chain, figure 15

With engine cold between 5/8–7/8in
With engine hot between 3/8–5/8in.
Torque adjuster screw nut (pn 37024) to 21-29 ft-lbs.

Adjusting Primary Chain | Figure 15

The measurement is not total free play just upward play on the top strand.

17. Install the primary gasket over the 1/4" dowels then install the outer primary.

18. Using blue Loctite® install the 10 outer primary oval slotted screws (pn 91790A542). Snug all of the screws starting from the center working your way outward. Repeat this a couple times to make sure all screws are snug. Tighten screws to 100-110 in-lbs.

19. Adjust the clutch following steps listed in your Factory Service Manual.

20. Install inspection cover and gasket using blue Loctite® on the screws, snug screws (pn 91790A539) then torque to 100-110 in-lbs.

IF YOU ARE RUNNING THE TTP AS A MODERN WET PRIMARY; USING PRIMARY FLUID (pn 99887-84) FILL THE PRIMARY UNTIL IT JUST HITS THE BOTTOM OF THE CLUTCH PRESSURE PLATE WITH THE BIKE LEVEL. 20- 24 fl-oz, see figure 16

Primary Fluid Level | Figure 16

21. Install derby cover with gasket using blue Loctite® on the screws, snug screws (pn 91790A539) then torque to 100-110 in-lbs.

22. If floor boards or pegs were removed to install your primary reinstall them as time per Factory Service Manual.

For Starter Version Primaries

Now that the primary end is all buttoned up we have to do some light wiring before we re-install the oil tank and route the oil lines.

Using the wiring diagram shown in figure 17 for reference, route a new starter cable from the battery to the starter. Make sure in routing of the cable that it does not interfere with the clutch cable release arm or cable. Once cable is tightened down install a cable boot over the connection to protect the lines and accidental grounding.
Light modification is required to the oil tank in order to clear the starter end cap bolt. Using a rat tail file clearance the tank bracket as shown in figure 18.

23. Install the oil tank into the frame; if you have a starter version the oil tank will have to be slide in from the right side of the motorcycle. While sliding it into position, attach the oil feed line and tighten down using a hose clamp.

24. Install the left side tank mount nuts and tighten per your Factory Service Manual.

Starter Wiring Diagram | Figure 17

25. Install the battery tray and the bottom tray bracket to your transmission per your Factory Service Manual.

IF YOU DO NOT HAVE THE TRAY BRACKET, YOU MUST ORDER AND INSTALL ONE FOR STARTER VERSIONS. THIS WILL PROPERLY SUPPORT THE BATTERY FROM SAGGING AND HITTING THE STARTER, LINES AND WIRING.

24. Install the left side tank mount nuts and tighten per your Factory Service Manual.

Notch Oil Tank Bracket | Figure 18

AKER recommends that you follow your Factory Service Manual for service intervals on your primary chain adjustment. Initial adjust your primary chain is 500-1000 miles if new, then every 5,000 miles.