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On the later years the XS650 used the BS 34 carbs. Very similar to the BS34 carbs the XS400 used. www.amckayltd.com/carbgide.pdf is a worth while read. Much of what it says applies to the BS34's used on the XS400. pec for jetting and float height you will need to get from the repair manual for...

A bit of searching in the TECH section my find the proper wiring diagram for your bike. If the wires you are asking about being the same color, yes they most often connect together. Some places the colors may change from one side of a plug to the other. Such as on the TCI pick ups. The diagram...

I think the 20 ohm as mentioned was a typo. most digital meters have a 200 ohm as the lowest scale. When you do any ohm checking it's best to use a scale above what you expect to get. the primary on most coils is less than 5 ohms so the 200 ohm scale will give good results. Secondary are often...

Old tires can be dangerous tires. They do get hard which reduces grip. They also are more prone to blowouts. On a sport bike if you ride it much I think the tires will wear out before they get old. A lot of those tires are very soft to improve grip but this soft a tire wears out quickly. Some as...

You might try around at highway speeds. This will allow the sidewalls to flex more. This extra flexing heats the tire uomore than at standard pressure. The heat lets the tire soften up and stretch a bit. You will know when it seats, The ride will smooth out. It may take a few minutes. Once it...

A few tips. Car oils of lighter weights are energy conserving oils. These have friction modifiers that make wet clutches slip. Often have a starburst on the label. These are anything less than 20w50, some 10w40 oils are this way too. These are ATV/motorcycle oils that are lighter weights as in...

Tubes usually fit several tire widths. Like it fits a 80-110 19. If you buy local just tell the guy behind the counter the size of your tires. If ordering online you might want to contact the seller to be sure you order the right tubes. The load index is a rating that shows how much weight a...

Generally speaking checking in the TECH section is a good place to start looking. For those who don't know where the TECH section is look up near top of page. See the TECH. click it. Leo

On your tire is a thin ridge just out from the rim. This ridge should be the same distance from the rim all the way around. If not then the bead is not seated right. While up on the stand set something along side the tire. This something should be able to hold a piece of heavy wire, A coat...

Yes. If your wiring is pretty much stock then Yes you need the safety relay. Power flows through the safety relay to the start relay/solenoid, they are the same thing. If you have a wiring diagram for your year, you can trace the red/white wire backwards from the starter relay to the safety...

I like the stock units with LED bulbs. I don't think any of the aftermarket LED turns look good on a vintage bike, Leo

Another thing, the superbright flasher can run LED lights as well as regular bulbs. up to 150 watts of lights. Leo

The stock bulbs for the tail/brake is an 1157. These are two element bulbs. The stock turns use an 1156, single element bulbs. Most LED bulbs use the same numbers. You can buy LED bulbs most anywhere regular bulbs are sold. Even Wal Mart. Online I use www.superbrightleds.com They have many bulbs...

If that is a ground for the start button hooking it up should not blow a fuse unless there is a problem with the starter relay. At the start relay unplug the blue/white wire. Try turning the key on, If the fuse don't blow your problem is with the start relay. Perhaps an internal short that...

I might try buffing the paint. A bit work that way may bring the color back. Maybe not all the way but very close. Leo

It sounds like you got the center stand use figured out. I just want to add that when you put your foot on the stand and your hand on the frame by the seat, you push down with your foot at the same time as you lift with your hand works well. Trying to do it with just the lift with your hand or...

One thing I have found is if you start at one end of the bike and work to the other end, inspecting every connection in the wiring. Cleaning and tightening with a tiny dab of dielectric grease to prevent corrosion will often fix things that can be troublesome. When you first get a bike going...

From looking at that pic the ring is not factory. If a PO has added that wire there is no telling what it is for. Can you trace this wire to where it goes? The other end will tell us a lot about what that wire is for. Leo

The headlight, if low beam works but no high beam, it's probably a blown bulb. You can pull the bulb and check to see if blown by jumping from the battery. Check the wire colors on the plug to the headlight. Black wire is ground, yellow is high beam green is low beam. Just jump the same way. On...

Your basic ideas are not correct. The charging system, the regulator, rectifier, field coil and stator and the wiring to hook it all together just charge the battery. That's it. Everything else runs off the battery. The starter does draw the most amps. Thus is only for a short time. The field...