The stock springs were around a 50 lbs. As they age and set compressed they may be down to 45 or even 40 lbs. I replaced mine on my 75 with a 750 kit with a set of 70 lb. NOS Kibble white springs.
I have done a few things to the clutch. Mostly clean up and remove burrs. With these springs, a well lubed cable and worm mechanism, proper adjustment and as few bends as possible, it has a two finger clutch. It's a bit tough with two fingers but it can be pulled. This clutch set up is not the easiest thing to use. I have pulled the clutch lever on many bikes. Most of the bikes from the same time period and same cc's pulled about the same. The 74 Kawasaki H1 500 I had It took both hands to pull the clutch when I first started riding it. My hands got stronger after awhile.
Most new bikes, last 10 years or so, have gotten much easier to use. Some don't feel like they are hooked to anything.
On cable lube the spray can stuff you use with as clamp on device are not worth the effort to use. They don't lube well last long.
Use the motor oil/funnel method described in the repair manual. It takes time but works very well and lasts a good long time.
Leo
