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Tin Type Primary

  • 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 fine chain 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
  • 2-Year limited warranty

     

Benefits

  • Quiet: Reduces chain noise
  • Modern: Modern starter integration possible
  • Clean: With redesigned parts, we have made sure that our TTP, leaks much less than the original
  • Wet or Dry: Can be run dry with Shovelhead era clutches and a 1970-E84 4-speed

Tin Type Primary Instructions

 

  • 1970-E84 Big Twins and custom 4-speed builds
  • 1970-79 ratchet top 4-speeds (top or bottom pull)
  • 1980-E84 turtle top 4-speeds (non-starter TTP version only)
  • Jockey top 4-speeds
  • BAKER 4-speed & BAKER 6-into-4

     

    Primary Finish Options
    The TTP comes in 2 different finishes

     

     

    Run it WET or DRY
    Can be run dry with Shovelhead era clutches and a 1970-E84 4-speed. Chain oiler feed and return provisions are on the back side of inner primary similar to factory locations. Remove 1/8” NPT plugs and install fittings (provided). For a cleaner look with better clutch function, heat dissipation, and dependability the TTP can be run wet with primary oil with the Splined Shovel clutch in conjunction with the BAKER splined 4-speed mainshaft. Splined 4-speed mainshaft available to convert any existing 1970-E84 transmission or it can be specified in a new BAKER 4-speed build. Splined Shovel clutch is highly recommended for 93+ inch engines to avoid trouble down the road.

     

    TTP Inner Primary Fittings

    Inner Internal Design

    Internal Design
    The internal design of the Tin Type Primary has been beefed up around the mainshaft bearing with a structural web design unlike the original 1970’s inner, which is prone for breaking. Modern fine tooth chain tensioner setup ensures quiet operation along with maintaining proper chain adjustment. Keeping your primary chain lubricated is a chain oiler fitting positioned just above and rearward of the adjuster. We added O-Ring counter bore pockets around the stud holes. These O-Rings provide a leak-free sealing solution over the old silicone trick. Provided with the TTP are self-locking flanged nuts for a proper squish of the O-Rings, worry free setup.

     

    Primary Drive Configuration Options:
    – 24 tooth motor sprocket, 37 tooth clutch sprocket, and stock 82 pitch primary chain (PN 40007-36B), for a 1.54 primary ratio.
    – 24 tooth motor sprocket is maximum size that fits within the TTP envelope
    – 22 tooth motor sprocket, 35 tooth clutch sprocket, and 80 pitch primary chain (available through BAKER) for a 1.59 primary reduction. 35 tooth clutch sprocket available with BAKER splined Shovel clutch.
    – 23 tooth motor sprocket, 38 tooth clutch sprocket, and stock 82 pitch primary chain (PN 40007-36B) for a 1.65 reduction. 38 tooth clutch sprocket available with BAKER splined Shovel clutch.

     

    BAKER Highly Recommends
    The use of a Harley ‘H-D’ 1.4kw starter for proper operation. If you are running the stock Shovelhead clutch double check the ring gear for wear. These were a 3-piece design that were riveted together and were prone for ring getting worn on the inside. Replace with a 1-piece ring gear, weld on finding in your local distributor catalog.

     

    TTP Fitment / Compatible With:
    – 1970-E84 Big Twins and custom 4-speed builds
    – 1970-79 ratchet top 4-speeds (top or bottom pull)
    – 1980-E84 turtle top 4-speeds (non-starter TTP version only)
    – Jockey top 4-Speeds
    – BAKER 4-Speed
    – BAKER 6-INTO-4
    – BAKER TTP-200A, Clutch release arm kit
    – Alternator style motor cases
    – Shovelhead clutches and BAKER splined clutch
    – 1990-2006 1.4kw H-D starters with ¼-20 or 10-32 shaft
    – Traditional tin derby and inspection covers or BAKER TTP covers
    – 1955-64 splined non-compensator motor sprockets
    – Stock 40007-36B primary chains
     TTP is not compatible with Factory Mid Controls

     

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

    New PN Old PN Description
    TTP-6N4K-310006 3100-TTP-R-6N4 Media blasted TTP assembly w/ hardware, Kick Only – Old 6N4
    TTP-6N4K-310002 3100-TTP-P-6N4 Show Polished TTP assembly w/ hardware, Kick Only- Old 6N4
    TTP-S6N4-310106 3101-TTPS-R-6N4 Media blasted TTP assembly w/ hardware, Starter Version- Old 6N4
    TTP-S6N4-310102 3101-TTPS-P-6N4 Show Polished TTP assembly w/ hardware, Starter Version- Old 6N4

     

    TTP Part Numbers for 4-Speed & BAKER 6N4 Transmissions with the 1.000” diameter mainshaft:

    New PN Old PN Description
    TTP-310006 3100-TTP-R Media blasted TTP assembly w/ hardware, Kick Only
    TTP-310002 3100-TTP-P Show Polished TTP assembly w/ hardware, Kick Only
    TTP-S-310106 3101-TTPS-R Media blasted TTP assembly w/ hardware, Starter Version
    TTP-S-310102 3101-TTPS-P Show Polished TTP assembly w/ hardware, Starter Version

     

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

     

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

     

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

    Note:
    The old style 6N4 with .983″ diameter mainshaft does not use a snap ring to retain the race adapter and bearing. The seal is pressed directly on top of the bearing for clearance for the older style bottle gear assembly on the transmission. See the below images for mainshaft identification; old VS new:

     

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

     

    .983″ STEPPED MAINSHAFT INSTALLED ON TRANSMISSION
    PN 996040-8

     

    .983″ STEPPED SHAFT WITH 1.000″MAINSHAFT SIDE BY SIDE
    COMPARISON

    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).

     

    Cover Kits

    Optional Derby Covers & Accessories:
    The TTP does not come with the derby and inspection covers, these must be purchased separately. Made out of Billet 6061-T6 Aluminum

     

    New PN Old PN Description
    TTP-310202 3102-TTP-P Inspection & Derby Cover Kit – Show Polished
    TTP-310206 3102-TTP-R Inspection & Derby Cover Kit – Media Blasted
    TTP-200A TTP-200A TTP Clutch Release Arm Kit

     

    Clutch Cable Kit TTP-200A

    Notes
    Kit PN TTP-200A is needed in order to run your stock style clutch cable setup, features a 10 degree release arm to clear a modern starter along with a clutch cable extension ferrule, so no modification to your stock setup is necessary.

     

    Recommended Upgrades
    – BAKER 4-Speed Transmission
    – BAKER 6 INTO 4 Transmission
    – The Splined Shovel Clutch; highly recommended for Big Horsepower applications and durability

     

    TERM AND CONDITIONS                                                                                         

    • BAKER Drivetrain reserves the right to change prices, terms or policies at any time without notice.
    • Orders can be pre-paid using Visa, MasterCard, American Express, Discover or PayPal.
    • All orders not pre-paid will be sent C.O.D. certified check or money order only unless pre-approved for company check acceptance.
    • Any orders from outside the USA must be pre-paid in US funds via wire transfer; a $30 transfer fee will apply.
    • Prices shown are F.O.B. Haslett, MI.

    LIMITED WARRANTY POLICY

    BAKER™ transmission assemblies, transmission kits, primaries, and oil pans are guaranteed to the original purchaser to be free of manufacturing defects in materials and workmanship for a period of 5 years from the date of purchase or up to 50,000 miles. BAKER™ clutches, kicker cover kits, belt drives, F6F kit, reverse systems, covers and accessories are guaranteed to the original purchaser to be free of manufacturing defects in materials and workmanship for a period of 2 years from the date of purchase or up to 24,000 miles - whichever occurs first. If the product is found by BAKER™ to be defective, such products will, at the option of BAKER™, be replaced or repaired at cost to BAKER™. 

    In the event warranty service is required, the original purchaser must call or write BAKER™ immediately with a description of the problem. If it is deemed necessary for BAKER™ to make an evaluation to determine whether the transmission assembly or transmission kit or accessory is defective, the entire transmission assembly, whether originally purchased as an assembly or kit, must be properly packaged and returned prepaid to BAKER™ with a copy of the original invoice of purchase. If after an evaluation has been made by BAKER™ and a defect in materials and/or workmanship is found, BAKER™  will, at BAKER™  option, repair or replace the defective part of the assembly. 

    WARRANTIES FOR "INSIDER SPECIAL" PRODUCTS

    Due to the uniqueness, low price and assembly outside of typical production process of products indicated as Insider Special products, purchasing these Insider Special products include a warranty so to guarantee the original purchaser to be free of manufacturing defects in materials and workmanship for a period of 1 year from the date of purchase or up to 12,000 miles. We have provided extended options for you to purchase below. 

    RETURNS AND EXCHANGES

    Any merchandise returned for any reason (exchange, credit or modification) must be accompanied by a Return Goods Authorization (RGA) number or it will be refused. Call BAKER™ to obtain this number prior to returning goods for any reason. There is a 15% re-stocking fee for all returned items. BAKER™ is not liable for any shipping charges. 

    ADDITIONAL WARRANTY PROVISIONS

    NOTE: Limited warranty does not cover labor or other costs or expenses incidental to the repair and or replacement of BAKER™ products.

    This warranty does not apply if one or more of the following situations is judged by BAKER™ to be relevant: BAKER™ OEM transmissions; (these are subject to the OEM manufactures warranty only), Improper installation, accident, modification (including but not limited to use of unauthorized parts, transmission oils or lubricants), racing, high performance application, mishandling, misapplication, neglect (including but not limited to improper maintenance), or improper repair. 

    BAKER™ shall not be liable for any consequential or incidental damages arising out of or in connection with a BAKER™ transmission assembly, transmission kit, component or part. Consequential damages shall include without limitation, loss of use, income or profit, or losses sustained as the result of injury (including death) to any person or loss of or damage to property.

    BAKER™ transmissions, transmission kits and accessories are designed exclusively for use in American V-Twin motorcycles. BAKER™ shall have no warranty or liability obligation if BAKER™ parts are used in any other application.

    If it is determined that a BAKER™ product has been disassembled during the warranty period for any reason, this limited warranty will no longer apply unless you were instructed to do so by a BAKER Drivetrain technician for diagnostic purposes.

    The words H-D®, Softail®, FXR®, Dyna®, FLT®, FLH®, Sportster®, and Buell® are registered trademarks and are for reference only.



    Tin Type Primary
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    Web Product ID: 7888481923
    Baker Drivetrain Team Illustration