Jackpiner Speedometer Ratio ?

[Bob]

Anyone know what the speedometer ratio is on my '72 Jackpiner with the original Enduro Kit ?

[Mark Annan]

1.42  A Penton manual for a '72 Jackpiner says so. I will hazard a guess ads say that all later model Pentons with a front wheel speedometer drive use the same ratio.  The early Steel tank Pentons need a 1.35 speedo if you sre trying to use the integeral front wheel driver.