loosen the top bolt , the two chain tensioners , and the bottom bolt that goes thru the carrer ..... just loosen them dont remove
NEXT push your carrier forward to wont go no more , might require some bashing lol.....
now try to install the chain if its still too short , you will have to add links .........
once the chain is on with a little play you can tighten the chain adjusters to proper chain tension ( sit on the bike or have someone do it ) .... then tighten all up and ride ......
if u have to add more links , add more links
sorry for the typo's im smashed