Sorry fixed the website addy for the install and I meant ratio not ration
You need an Electronic Ratio Adapter, you need it to correct your speedo the ERA will run you from about $130-150 depending on which brand you go with, anyway check out these sites:
www.abbott-tach.com
Install:
www.lx.net/jlynch/abbott.html
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Yours in SPEED=======D
Mandy aka GTGRL00