1. oil the cable.
2. grease the perch.
3. do hand excersises and stretching to improve circulation and strenght.
4. when riding RELAX.
5. last resort get and "easy pull lever or device" they make many models.
not all prove to be the answer though.
those things will work.
if all this above fails buy a 500, sit down, and forget the clutch :)
The hydro clutch makes the pull HEAVIEr on many bikes. The best and cheapest option is to get a motion pro T2 grey bale, get a motion pro cable luber and use alot of wd-40 as lube. Get a cr lever and perch
(better leverage ratio) and grease, clean and lube it often. I do it every ride and sometimes after I crash!!! Really, most heavy and inconsistent pulls are do to a lack of clutch maitenence. Take some advil too before you ride. It thins the blood out and really relievs the cramps that you are encountering when you ride.