Gearing and battery questions
Hi guys i got some questions, i want to change my bike gearing and i hear the 15/41 is the most lowered sprocket to put on the bike also my bike chain because i ride on highway and i have to rev up to 8k rpm, but also i want to reduce the rpm to don't force the engine, if someone knows a good but economic brand on ebay please share with me the link
Also i want to change the battery because i have with the battery like 4 or 5 years and i don't know what size or amps the battery need to have or that stuff
Ps: my english is bad
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