Will a Grizzly H3051 Riser Block Kit, work on a 14" Reliant Mod. DD90 ???

The block might fit but besides the block, the bar for the guides and guards need to fit as well. Also add in a new spring which you will probably need. It will be a crap shoot. You might get lucky and everything fit just fine. You might end up with an unusable kit.

I put a riser block on my HF saw and am lukewarm about it. I just don’t use the extra height that much. If I were to do it over again, I wouldn’t have put it on. If you are putting big wood through it, there are stability issues and frankly, I would also prefer a larger table that comes with the big saws.

-- Woodworking shouldn't cost a fortune: http://lowbudgetwoodworker.blogspot.com/

Hard to say if will or will not. Grizzly has two riser kits. Without knowing measurements who can tell?

http://cdn0.grizzly.com/manuals/h3051_m.pdfhttp://cdn0.grizzly.com/manuals/h3051_m.pdf

http://cdn0.grizzly.com/manuals/h7316_m.pdf

Fine Woodworking did a review back in 2002 on your bandsaw, “One of the lowest-priced saws and a near twin to the Central Machinery, the Reliant is the only saw in the test with four speeds.” Did not say anything about a riser kit, other than saying motor bogged down while resawing if stock pushed too fast.”
Save your money for new used bandsaw.

-- Bill