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DannoXYZ · December 30th, 2019, 08:05 PM

There are actually two versions of 400, one where rear-shock attaches to frame similar to 250R/300. And more advanced version where shock attaches to engine. I think U.S. bikes are ones that attaches shock to engine. Ninja 400 shock will fit just fine if you get triangular knuckle as well.

However, it's not any stiffer than new-gen 250R or 300 shock because 400 is lighter than both of them. Rented one last year for Thunderhill and it's definitely better handling than previous 300 I tried 2-yrs ago. I suspect most of this is in 23-lbs less weight than 300 (and the 20 I lost).

Good solution in between recycled 250/300/400 vs. full-race shocks such as Ohlins or Penske is Progressive Suspension 435.
https://www.progressivesuspension.co...shock-kawasaki

Or as previously mentioned, GSX-R or SV650 shocks of eBay. Will need to get some sleeves to fit larger holes in 250 frame and knuckle. No mangling of frame or shock needed.
https://www.ninjette.org/forums/showthread.php?t=214238

December 30th, 2019, 08:05 PM	#16
DannoXYZ ninjette.org certified postwhore Name: AKA JacRyann Location: Mesa, AZ Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot. MOTY - 2018, MOTM - Nov '17	There are actually two versions of 400, one where rear-shock attaches to frame similar to 250R/300. And more advanced version where shock attaches to engine. I think U.S. bikes are ones that attaches shock to engine. Ninja 400 shock will fit just fine if you get triangular knuckle as well. However, it's not any stiffer than new-gen 250R or 300 shock because 400 is lighter than both of them. Rented one last year for Thunderhill and it's definitely better handling than previous 300 I tried 2-yrs ago. I suspect most of this is in 23-lbs less weight than 300 (and the 20 I lost). Good solution in between recycled 250/300/400 vs. full-race shocks such as Ohlins or Penske is Progressive Suspension 435. https://www.progressivesuspension.co...shock-kawasaki Or as previously mentioned, GSX-R or SV650 shocks of eBay. Will need to get some sleeves to fit larger holes in 250 frame and knuckle. No mangling of frame or shock needed. https://www.ninjette.org/forums/showthread.php?t=214238