I have just checked coupons. The lowest price I could get is $12.41 for 47cc 49cc Mini Moto Centrifugal Clutch (in Banggood). Price history, coupons and price alert are available on this page. Best price?
Condition: This is a new item., Color: Like the picture show, Size: Show in the picture, Note: Hand measurement will have a little discrepancy
Latest coupon and price update (UTC):
Banggood ($12.41)
Banggood warehouse is located in China. Is it expensive? Well, this price is higher than average price ($11.17) We have found one coupon for this product!
Link: Banggood product page
Price without coupon: $13.79
1. ($12.41): BGAMMT03
just apply this code in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGAUTO22, BGe3a2e5, BGdcbfa8, TTSUMMER8, Cuponation9, BGSCM75, BGSCM11, BGCAR639
(these codes were not working in latest coupon update, but you can check them out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – 47cc 49cc Mini Moto Centrifugal Clutch [EU] ($-3)
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Price history (for all/most countries) for 47cc 49cc Mini Moto Centrifugal Clutch is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).