Honda Spree and Elite 50 Forums

I am about to drill my exhaust and add a paper air filter. Everything else is stock. What size jet should I get. The honda store says they only have an 85. What model would have a 90. Can I drill them? What size in Inches is the 85 or 90?
Thanks for the help.

Go see adv. tech docs on jet to bit sizes.

Perfect. Thanks. Any recommendations for a starting jet for intake and exaust mod?