ini ▁left ▁Ben elli ▁and ▁joined ▁A erm ac chi , ▁fresh ▁out ▁of ▁a ▁mer ger ▁with ▁Har ley - David son . ▁Much ▁of ▁the ▁ 1 9 7 1 ▁season ▁was ▁lost ▁to ▁testing ▁the ▁A erm ac chi / Har ley - David son ▁ 2 5 0 cc ▁bi ke , ▁which ▁took ▁much ▁longer ▁in ▁development ▁than ▁had ▁been ▁anticip ated . ▁The ▁resulting ▁bi ke ▁was ▁not ▁superior ▁to ▁most , ▁and ▁a ▁number ▁of ▁up - and - coming ▁rac ers ▁increased ▁competition ; ▁among ▁them ▁was ▁Jar no ▁S aar inen , ▁to ▁whom ▁Pas ol ini ▁lost ▁the ▁ 2 5 0 cc ▁world ▁championship ▁in ▁ 1 9 7 2 ▁by ▁a ▁single ▁point . ▁ ▁Death ▁ ▁Pas ol ini ▁lost ▁his ▁life ▁at ▁the ▁Italian ▁Grand ▁Prix ▁in ▁Mon za ▁on ▁ 2 0 ▁May ▁ 1 9 7 3 . ▁He ▁was ▁not ▁able ▁to ▁finish ▁the ▁ 3 5 0 cc ▁race ▁because ▁of ▁mechanical ▁problems , ▁ret iring ▁from ▁the ▁race ▁with ▁four ▁la ps ▁remaining , ▁and ▁fell ▁during ▁the ▁first ▁lap ▁of ▁the ▁ 2 5 0 cc ▁race . ▁Jar no ▁S aar inen , ▁immediately ▁behind ▁him , ▁was ▁unable ▁to ▁avoid ▁him ▁and ▁fell ▁as ▁well , ▁causing ▁a ▁chain ▁reaction ▁ultimately ▁involving ▁twelve ▁rid ers ▁and ▁resulting ▁in ▁Pas ol ini ' s ▁and ▁S aar inen ' s ▁death s . ▁ ▁Much ▁debate ▁has ▁surrounded ▁the ▁probable ▁causes ▁of