K5-K8 Suzuki GSXR1000 Full Race Gearbox

Comprises input shaft and all loose gears.  Assembles using standard output shaft and all bushes, spacers, circlips and bearings from the Suzuki gearbox.

Clutch nut is a full thread type and retains the standard lock spring washer and is supplied with the gear set.

The two different ratio’s are our own specification and we feel will give a significant benefit over the road bike ratio’s in race use.

To improve gear changing, all gears use only three dogs with sufficient “backlash” to give fast gear changes without the need to compromise as in the standard four dog gears.  All dogs are undercut both in drive and overrun, unlike the road box which is only undercut on the drive faces and not at all on first gear.

1st 15 – 36 2.400:1
} 19.0%
} 15.1%
} 11.8%
} 9.4%
} 6.6%
2nd 18 – 35 1.944:1
3rd 20 – 33 1.650:1
4th 22 – 32 1.455:1
5th 22 – 29 1.318:1
6th 26 – 32 1.231:1
Overall reduction 1st – 6th 48.7%

1st 15 – 36 2.400:1
} 19.0%
} 13.4%
} 9.5%
} 7.5%
} 6.5%
2nd 18 – 35 1.944:1
3rd 19 – 32 1.648:1
4th 21 – 32 1.524:1
5th 22 – 31 1.409:1
6th 22 – 29 1.318:1
Overall reduction 1st – 6th 45.1%

1st 16 – 41 2.563:1
} 19.9%
} 16.5%
} 12.5%
} 9.3%
} 7.4%
2nd 19 – 39 2.053:1
3rd 21 – 36 1.714:1
4th 24 – 36 1.500:1
5th 25 – 34 1.360:1
6th 26 – 33 1.269:1
Overall reduction 1st – 6th 50.5%

K5-K8 Suzuki GSXR1000 Full Race Gearbox

+VAT (if applicable) & Carriage

K5-K8 Suzuki GSXR1000 Race Conversion Gearbox

This is for those people who find the racing first gear too high for clutch starts, particularly in sidecar outfits.

The standard input shaft is used but is mated to a higher output gear.  All other gears and features described above are retained.

Please click here and here for important fitting instructions

Available with Superfinish

1st 16 – 40 2.500:1
} 22.2%
} 13.4%
} 9.5%
} 7.5%
} 6.5%
2nd 18 – 35 1.944:1
3rd 19 – 32 1.684:1
4th 21 – 32 1.524:1
5th 22 – 31 1.409:1
6th 22 – 29 1.318:1
Overall reduction 1st – 6th 47.3%

1st 15 – 36 2.400:1
} 19.0%
} 13.4%
} 9.5%
} 7.5%
} 6.5%
2nd 18 – 35 1.944:1
3rd 19 – 32 1.648:1
4th 21 – 32 1.524:1
5th 22 – 31 1.409:1
6th 22 – 29 1.318:1
Overall reduction 1st – 6th 45.1%

1st 16 – 41 2.563:1
} 19.9%
} 16.5%
} 12.5%
} 9.3%
} 7.4%
2nd 19 – 39 2.053:1
3rd 21 – 36 1.714:1
4th 24 – 36 1.500:1
5th 25 – 34 1.360:1
6th 26 – 33 1.269:1
Overall reduction 1st – 6th 50.5%

K5-K8 Suzuki GSXR1000 Race Conversion Gearbox

Price £1495.00

+VAT (if applicable) & Carriage