Sprocket for Adv 390 X 2025
Hey everyone,
I've been riding my 2025 KTM 390 Adventure X and have clocked 18,000 kms. The stock chain and sprockets are due for a replacement. Would love some guidance from fellow 390 Adv X owners before I pull the trigger on parts.
Here's what I need help with:
What is the stock front sprocket tooth count on the 2025 390 Adv X?
What is the stock rear sprocket tooth count?
Has anyone changed the tooth count on either sprocket? What gearing combo are you running and what difference did you notice?
Stock chain spec — pitch (520?), link count, and OEM brand?
Recommended aftermarket chain brands
Sprocket brands that fit without modifications — JT, Sunstar, Supersprox?
At 18k kms, should I replace both sprockets along with the chain?
I ride a mix of city commuting and weekend off-road/gravel. Thinking about going +1 on the rear for more grunt on trails without hurting highway cruising too much — but only if the stock tooth count makes that practical.
Any part numbers, tooth count recommendations, or firsthand experience is super helpful. Thanks in advance! 🧡