battery is easiest way to go. for future refrence. one of the guys on here suggested using steel cable for pull start rope. i recently tried it and like it alot. works really well. only need to use the 1/8" stuff and you can put more on to keep yourself from hitting end of rope which causes most breaks.
also for future refrence. all parts are important. the manufacturers save money any way they can so every part is there for a reason. next time you know you are missing something just get it.
Trikes: All Honda: 84 250r, 85 86 and 87 250sx, 84 and 85 125m, 79 82 84 and 85 110's, 73 us 90 and 77 atc90, 75 atc70
Cycles: Honda: 71 cb100, 78 cb750 coming soon cb750 trike. Yamaha: 67 yds 3 (250cc, 2cyl, 2 stroke), 82 750 SECA
Other toys: Chenoweth VW sandrail dune buggy, old race go kart, racing mower, 76 Arctic Cat Pantera 440 snowmobile
KEEP IT ON ALL 3 OR AT LEAST 2 AT A TIME