Look on the right margins: cb750faces.com is Marcel. He's a sponsor of the site. My understanding he also does other models...
Going thru the front brake system involves two rebuilds, the master cylinder (if needed) and the caliper (if needed).
If you are simply pursuing thorough maintenance, and don't have a known performance issue, then a quality flush/bleed of the entire front system is a good idea. Many replace the factory rubber brake lines with new, rubber or stainless lines. Member here (slingshot-cycles.com) makes bolt-in lines from either material, including new hard lines to connect the caliper on the fork lower. Even offers member discounts (code sohc4).
If there's a problem with the system, disconnect the caliper from the mounting arm, and use the brake lever to drive the piston out (separate the two halves of the caliper). Inspect for pitting on the surface. There's also an O-ring/seal that is frequently replaced. The groove the seal sits in needs to be VERY clean. Replacement pistons are available, also phenolic units which are an" upgrade" from Godferrey (member here).
The MC rebuild kit is commercial available. Hardest part is generally removing the circlip internally. Once free, you can clean (common requirement, did you notice?) and replace with new parts.
A couple of suggestions: the Services Offered or Parts For Sale section is a good place to locate some of these vendors. You'll notice by the number of times their "thread" has been read whether their long standing and well known. Use this a basis of endorsement comfortably.
All the repairs listed above are very straightforward and you will be very capable of performing them. If you get stuck, open a thread and post your issue. You can also use the Search function above, to find "MC rebuild" "caliper rebuild" "heavy clutch" to find good diagnosis and remedy solutions.
Your clutch could be a poorly lubricates cable, could also be "stuck" clutch plates. These bikes use a wet clutch and prefer to have warm oil on them to help them function best. If the bike has been sitting a while, they could easily be "grumpy". Lube the cable, then raise the rear wheel, shift bike into higher gear, (motor off) and try rotating the wheel to help loosen them up. If safe, run the motor, and shift through some gears, operating the clutch. But be SAFE doing this.
You may also need to adjust the clutch cable per the manual to determine whether this is a part of your issue.
Okay, weekend is here, get to work and have that thing running by Sunday afternoon!
