Jims
Jims, fat-5 transmission
Jims, fat-5 transmission
Couldn't load pickup availability
The JIMS Fat-5 Overdrive are 5-speed transmissions with wider gears to handle the extreme peak loads on the transmissions with todays high power engines and big tires with a lot of traction. These peak loads rise far above the loads for what standard gears were designed to endure. The JIMS Fat Gear transmission are equipped with gears that are 18% up to 53% wider; depending on the load each gear set must carry. Gear ratio''s are: 1st 2.94:1; 2nd 1.93:1; 3rd; 1.31:1; 4th 1.00:1; 5th 0.886:1 overdrive (stock is 1:1). Note: Custom application. Because of the width of the gears this transmission is +.560" (13mm) wider than stock at the transmission cover. This may interfere with exhaust and/or oil filler spout. Necessary modifications must be made.
Share

Why buy from Forty5°
-
Not sure it fits?
Ask on WhatsAppPick your bike at the top of the page to see which parts are listed for it. For anything not listed, send us your VIN on WhatsApp and we'll confirm the fit before you order.
-
Workshop installation
Book a serviceHave us fit it. Book installation at parts intake — same-day on most jobs, master techs only.
-
Founder-led aftersales
Get in touchQuestions after fitment? You'll speak to the people who installed it. We answer email and WhatsApp Tuesday to Sunday, 11am–7pm.