wiredgeorge
Administrator
Hard Core Rider!
Posts: 2597
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« Reply #15 on: February 23, 2010, 07:34:51 PM » |
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Those are not smoothbores but are likely VM28SC from a 74 as noted.
As far as the electrical issues, post a new thread in the electrical section. To check an electrical issue and ensure that your battery is charging properly, first check your battery to see if you have sulfated cells. The small/cheap batteries used in a KZ don't last long and especially if the bike is not ridden often. The cells sulfate and won't hold a charge. Take the battery to a place with a battery tester or buy a small (very inexpensive) hydrometer which looks like an eye dropper with colored balls inside the clear part. You draw in fluid from each cell and if any of the balls fail to float, the cell is sulfated and the battery should be tossed. It may not be completely dead but it doesn't hold a charge well.
If the battery is good and fully charged using a less than 1 amp trickle charger for 8 hours, then test your stator. There are three wires coming off the stator and these will all be yellow OR yellow, pink and blue. Each is an AC leg. Use a multimeter and hold one lead to one of the legs and another lead to another leg and test the AC voltage output while the bike is running at about 4K rpm. It WILL run on battery only while the power is disconnected. At 4K rpm each pair of legs should show about 40 Volts AC. If less, the stator may need to be swapped out. It is common for the magnets to get tired and the voltage to be low. Some auto electrical shops rewind stators. If you have a leg with no voltage, toss the stator or have it rewound.
If the stator proves OK (after checking the battery), clean your connections from stator to regulator/rectifier and ensure good grounds for both. The big thick white/red wire needs to have clean contacts... use electrical contact cleaner and dielectric grease after cleaning. If you still have low voltage, replace the regulator and rectifier with a NEW combo unit. They are fairly expensive but worth buying rather than trying to use more tired old electrical junk but don't spend the money till you have tested things in the order suggested.
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