World's Largest Aftermarket Motorcycle Parts and Accessories Superstore!


Shop Cyber Monday Deals Extended
Shop Cyber Monday Deals Extended

Baker 6-into-4 Complete Transmission

Select your motorcycle to guarantee fitment! Select A Motorcycle


Free Ground Shipping

Read Reviews

J&P Part: 620-929

– Order in the next to ship today


Baker 6-into-4 Complete Transmission

Fitment Note: Fits up to Early 1984. Will NOT fit Late 1984 models

• Includes kicker assembly

• Mainshaft permits re-use of stock primary drive

• Roller detent shift drum with reduced inertia, and gear dog teeth with lead-in rampimg produces significantly smoother shifting

Made In The USA This product was proudly made in the USA

Important Product Notes

Product Specs

Drive Side: Left

Finish: Polished

Manufacturer Part Number: K6402P

Sold in Units: assembly


Select your motorcycle to guarantee fitment! Select A Motorcycle

Fitment Note: Fits up to Early 1984. Will NOT fit Late 1984 models

Click (+) to view all compatible models

Harley-Davidson® Models

Disc Glide Willie G Special FXDG : 1983
Electra Glide Anniversary FLH : 1978
Electra Glide Classic FLHC : 1979–1981
Electra Glide Classic Side Car FLHCE : 1979–1981
Electra Glide Fat Bob FLHFB : 1970
Electra Glide FLB : 1970
Electra Glide FLBF : 1970
Electra Glide FLH : 1970–1978, 1981
Electra Glide FLH-74 : 1980
Electra Glide FLH-80 : 1978–1980
Electra Glide FLHB : 1970
Electra Glide FLHF : 1970–1975
Electra Glide Heritage FLH : 1981
Electra Glide Police FLHP : 1981
Electra Glide Police FLHP-74 : 1979–1980
Electra Glide Police FLHP-80 : 1979–1980
Electra Glide Police FLP : 1971–1972, 1974–1975
Electra Glide Police FLPF : 1971–1972
Electra Glide Sport FLHS : 1977, 1980–1981
Low Rider FXS : 1977–1978, 1981–1982
Low Rider FXS-74 : 1979–1980
Low Rider FXS-80 : 1979–1980
Low Rider FXSB : 1983–1984
Sturgis Belt FXB : 1980–1982
Super Glide Electric Start FXE : 1974–1984
Super Glide Fat Bob FXEF : 1980–1984
Super Glide Fat Bob FXEF 74CI : 1979
Super Glide Fat Bob FXEF 80CI : 1979
Super Glide II FXR : 1982–1983
Super Glide Kick Start FX : 1971–1978
Super Glide Low Rider FXRS : 1982–1983
Super Glide Sport Glide FXRT : 1983
Touring Electra Glide Classic FLHC : 1982
Touring Electra Glide Classic FLHTC : 1983
Touring Electra Glide FLH : 1982–1984
Touring Electra Glide Special Edition FLHX : 1984
Touring Electra Glide Sport FLHS : 1982–1984
Touring Electra Glide Standard FLHT : 1983
Touring Tour Glide Classic FLTC : 1981–1983
Touring Tour Glide FLT : 1980–1983
Wide Glide FXWG : 1980–1984

Customer Reviews

Overall Rating:
5/5 based on 1 rating

5 by

When I broke into the Harley world, having always had "metric" bikes...I wanted something different...which I found in an '84 Softail. First year Evo motor...almost the last year for a 4 speed with a kickstart. I thought it was so cool...but I soon found out it was hard to keep up with the 5-speed bikes...and if I did the vibration was so was so bad I could see nothing in my mirrors. And it is almost impossible to keep a 4-speed from leaking out the main seal for more than a year. I have been looking at this type of transmission since they came out with the 5-speed in a 4-speed case, but when I saw the Baker 6-in-4 with a kicker, I just had to have it. Now, nowhere did it actually say it would fit my bike, but being a machanic buy trade I figured I could make it work, so I bought it. It was almost a bolt in...I just had to cut the mounting studs so they would not hit the shocks.The inner primary had to be clearanced to clear the sprocket nut, but that was in the the directions. At the same time I went from a 51 tooth rear sprocket to a 48 to really help out on the top end. The difference is is like having a new bike...I can see out my mirrors at 80...the 5 speed bikes have a hard time keepin up with me :) Now for the downside...this trans is 1.5 inches wider than the 4 speed, so the exhaust you are running now may or may not work...mine did after a few whacks with a ball peen hammer. The kickstart arm they sent with the trans is the offset style...which puts it WAY too far out with the trans being wider...I replaced it with the straight style which puts it back to where it was with the offset syle on the old trans. The biggest problem I have had is keeping the bugs off my teeth because I am always smiling while riding it.

Load More Reviews

Shipping Note

Additional oversized shipping charges will be applied for expedited shipments within the contiguous U.S. Shipping charges outside the contiguous U.S. are calculated by weight and dimension during checkout.

Fast Free Shipping on Orders at $99.99 & Over
Free Tech
120 Day

Select Your Motorcycle

Live Help

Get Help From Our Industry Experts

Call Us 24/7 1-800-318-4823

Help / FAQs