▁the ▁accident , ▁with ▁the ▁most ▁common ▁explanation ▁suggesting ▁that ▁a ▁sp ill ▁left ▁on ▁the ▁track ▁during ▁the ▁ 3 5 0 cc ▁race ▁( when ▁Walter ▁Villa ' s ▁Ben elli ▁le aked ▁on ▁the ▁pen ult imate ▁lap , ▁but ▁the ▁ur ge ▁to ▁collect ▁championship ▁points ▁led ▁the ▁r ider ▁to ▁continue ▁racing ▁despite ▁the ▁leak ) ▁likely ▁caused ▁the ▁bi ke ▁to ▁slide . ▁While ▁it ▁has ▁been ▁as cert ained ▁that ▁race ▁officials ▁did ▁neglect ▁to ▁order ▁clean ▁up ▁of ▁the ▁track ▁prior ▁to ▁the ▁ 2 5 0 cc ▁race — one ▁r ider , ▁John ▁D od ds , ▁made ▁his ▁concerns ▁known ▁to ▁authorities , ▁only ▁to ▁be ▁met ▁with ▁thre ats — P as ol ini ' s ▁fall ▁and ▁the ▁damage ▁sust ained ▁by ▁his ▁vehicle ▁are ▁consistent ▁with ▁an ▁engine ▁problem , ▁likely ▁a ▁se iz ure ▁of ▁the ▁p ist ons . ▁ ▁The ▁Duc ati ▁Pas o ▁In ▁ 1 9 8 6 , ▁Duc ati ▁Motor ▁Hold ing , ▁then ▁under ▁the ▁ownership ▁of ▁C ag iva , ▁introduced ▁the ▁Duc ati ▁Pas o , ▁named ▁after ▁Pas ol ini ▁and ▁designed ▁by ▁Mass imo ▁Tamb ur ini , ▁co - found er ▁of ▁B im ota . ▁ ▁Motor cycle ▁Grand ▁Prix ▁results ▁ ▁Point s ▁system ▁from ▁ 1 9 6 4 ▁to ▁ 1 9 6 8 : ▁ ▁Point s ▁from ▁ 1 9 6 9 ▁on wards : ▁ ▁( R aces ▁in