Like you, I try to purchase as much as possible online from the US.

What I've bought:

-Oil
-Tires
-Spark Plugs
-Chains

Parts specific, there aren't many parts for an NSR unless you've done your homework to see what parts from other bikes cross reference.

I will say if you're looking to save some $$, try tygaperformance!

Dana
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2016 Husqvarna 701SM
2021 Husqvarna FS450 supermoto
2014 Honda CRF250R supermoto
1995 NSR250r MC28