Help

It looks like a 250R rear shock. It will fit the rear of a Blaster by installing using the same method as installing the 400ex rear shock.
 
i run that same (looking) trx250r shock on my black bike, at almost 17", it will not work on a stock swingarm without relocating the bottom shock mount. (unless you like the trailer park airshock camaro look ?)

the KOR 400ex bushings do work for the smaller diameter bolt, but need mounted on the outside of the frame mounts, and the shock bushing shaved down to fit between the mounts

when first installed on the +4 swinger, it raised my grab bar 6" higher than normal, thats unexceptable.
i relocated the shock mount back and lowered it back down to 1" above normal.
i do really like the longer travel and plushness of those shocks and is well worth doing what is needed to make it work
 
I didn't think so but the top does look like a 250r wonder if I can make it work is a little over 17 too long. Do you think this thing is oem or aftermarket
 
17 is way too long for the standard shock mount location
didn't take notice of the bottom mount, appears to have heim joints ?
the body, spring and rezzie looks identical to my 250r shock.