When converting a 160 series TwinSpark engine to suit a 105 chassis, by fitting a modified 105 timing gear you can preserve the use of the mechanical drive tachometer, instead of converting it to an electronic type.
A standard 105 timing gear with helical tachometer drive gear is too long to fit within a TwinSpark timing case, we disassemble a 105 timing gear and machine both the shaft and spacing boss on the smaller gear for a perfect fit within the TwinSpark timing case.
GTA style cross-drilled and back-cut timing gears also available.
Shipping AUD15.00 Australia-wide. Please contact us for international shipping options.