'16 yz250 stock shock spring

Did you ask him?

Spring might be marked. Or check mxa specs on rear spring.

Should have a black paint mark on it

Went back to steel i think

They stopped doing Ti springs like in 2008 i believe...its steel...and it a 5.1rear spring , front fork springs are .45....pretty light for most riders.....i went with 2009 yz250f oem springs i found on ebay .45 fork springs and 5.3 rear Ti spring still needs a revalve but as long as the breaking bumps dont get to big the bike rides descent....be sure your sag is 100-108mm, fork height between first ring 5mm to as much as 10mm, balance the frame first...i run mine at 106mm and 7mm...see where your High Speed compression is (17mm nut surrounding the flat blade Low Speed compression) on the rear shock...turn it all the way in the back it out 1.75 -1.50 turns...set the Low speed compression at about 9-11 turns out from all the way in....put rebound at about 9-12out....Forks C; 9 out...R; 11 ....or use the reviews specs in MXA magazine for the yz250....if your over 160lbs with gear and are pretty fast the bike will feel soft, also the steel springs feel better in the rear....the Ti spring is very critical couple clicks can make it to busy...steel is much more consistant when making adjustments...getting reay to send my suspension off to GreameBrough and ditch the Ti spring...

i have a 5.7 spring here if you want it for let me know, i also have .46 fork springs

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The 2016 yz 250 springs are steel. The forks are .44kg 454mm. The shock is a 4.9kg.