Malossi HTQ Primary Gearbox (z=15/40) – longer gear ratio for your Suzuki Katana 50

If you have modified your engine or are running a tuning cylinder, noticeably more power is delivered – and this can be converted into more top speed. The problem: the original final drive ratio is usually chosen so that the stock engine can pull it without problems. As soon as more HP is available, the engine quickly "tops out" at higher speeds – the RPMs increase, but the top speed hardly does.

This is exactly where the Malossi HTQ primary gearbox comes in: the gears and intermediate shafts are not only processed to a first-class standard, they bring the final RPMs to a bearable level and allow the top speed to increase significantly. Perfect if you want to meaningfully lengthen the gear ratio of your Suzuki Katana 50.

And don't worry about the myths that the engine will no longer start well with a longer gear ratio: usually, slightly stiffer clutch springs are sufficient to compensate for this. On the contrary – if the gearbox is too short for the available horsepower, you are wasting valuable power because the engine could actually pull significantly more.

Advantages & Features

• Longer gear ratio for more potential top speed
• Reduces excessively high RPMs at high speeds (engine "does not top out")
• First-class workmanship of gears and intermediate shafts
• Ideal in combination with a tuning cylinder or modified engine
• For better acceleration, often only slightly stiffer clutch springs are necessary

Technical Data / Details

• Manufacturer/Series: Malossi HTQ
• Version: Primary gearbox
• Number of teeth: z = 15 / 40
• OEM numbers (for comparison purposes only): 67 9433, 679433

Compatibility (Vehicles)

• Suzuki Katana 50 AC (Air) (from year 1999)
• Suzuki Katana 50 AC (Air) (up to year 1999)
• Suzuki Katana 50 LC (Water) (up to year 1999)
• Suzuki Zillion 50 (up to year 1999)

Tip: This gearbox is the right choice if you want to get more actual top speed out of your Suzuki Katana 50 (AC or LC) with a tuning setup, without the RPMs exploding unnecessarily.