I recently turned my 86 Vulcan 750 in just to get checked out since buying some months ago. I was told the Master cylinder is not keeping pressure so they wanted me to purchase the entire assembly, $276.00. I was told Kawasaki discontinued this part any suggestions on where to purchase this part? They are also charging 75.00/per hour, Is this easy enough to change out for a beginner? The shop also said that it could be the viewing window being sealed with epoxy, Could this be the problem?
Lots of gaskets and such that make up the master cylinder, so it could be a number of places. Might be a wrong assumption, but are you losing fluid along the way?
You can buy a master cylinder rebuild kit (I saw one on eBay recently - I'll see if I can find it); you can also purchase used MCs on eBay; I also have a used one off an '85 that I could sell you for $35 shipped.
As far as changing out the MC, it's not too difficult for a beginner, and there are plenty of folks here who could walk you through it. A couple of things to keep in mind:
1. Brake fluid is ridiculously corrosive, so you'll want to cover any and all painted parts. Or even non-painted parts.
2. The front brakes are a closed system - once you empty out the old brake fluid, you'll pull the master cylinder off. Put the new one on, and the you'll do the brake bleed/refill as has been posted elsewhere here. It's messy and you need to be patient, but it's a straightforward process.
3. How do your brake calipers look? Jsut wondering if there's somewhere else in the system that might be the source of the trouble.
4. Where are you located? There might be one of us nearby who could lend a hand, if you need it.