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Fits Triumph 500 & 650 Pre-Unit (T100
M Part number is 57-4402
Experiencing Transmission problems
82-8024 & F8024
M Part number is 99-7054
Lucas Type Auto Advance Unit Springs (1 PAIR) - 54415642 14-0702 Fits Triumph 500 & 650New Lucas Type Auto Advance Spring Set. It is crucial that your auto advance springs are in good working order. In detail, if your springs become worn and loose tension, it will cause erratic idle especially when the RPM's are decreasing. This new auto advance spring set has the right tension which will allow your motorcycle to rev smoothly throughout the RPM range and smoothly at idle. Works with most Triumph, BSA, & Norton singles, twins and triples