Shake, rattle, & roll. Fork spring swap?

My '93 750 is starting to show signs of fork spring/old oil stress.

The handlebars shake and rattle over just about every bump and the front end dives more than it should when coming to a slightly aggressive stop.

I bought the bike with 40k on the odometer and I'm really not sure if a fork service has ever been done on this bike (the condition it was in [trashed] when I bought it would indicate not).

I want to do a full fork service but I'm not sure if replacing the springs is really neccissary unless they don't measure to spec.

I only weigh 165lbs and I ride semi-aggressive and I think the stock springs should be adequate for my size but I'm not 100% sure.

I checked with sonic springs and their prices are fair. �I could afford new springs but I don't know if I should go with progressive or single rate springs should I end up swapping them.

Does anyone with my weight/riding style have any experience with either of those types of spring and what weight/brand oil are you happy with?

Thanks!

progressive rate springs ( a compromise) and factory valving (a compromise) even when new or freshly serviced are ok to compensate for the broadest range of potential buyers.

Now that your bike has an owner, set the suspension up for your weight and riding style.

Sonic, racetech, ohlins, springs are all great as long as it is for your weight and riding style.  You should revalve and play with your shim stack at the same time.  simply changing the fork oil wt can help some areas and harm others regarding your suspension doing it's job....

If you are not comfortable digging in to the valves and shims yourself (it can be intimidating but Hispanic Slammer has some excellent stuff archived for these mods) your are not far from Jamie Daughtery in Indiana and he can help your sort the best steps based on your budget.

Reading up on what JD has to say about the issue in general is inspiring and at the same time daunting.  

I wish I was better educated in the engineering behind all of the factors involved, appears to be somewhat complicated and I don't have the cojones to try a rebuild without some more help.

I will try to get in touch with him, thanks for the reply!