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I barely get over 13V above 3500 rpm and higher. My regulator is stock mechanical, but does not have the adjustment screws to vary the output. Battery is one year old, will hold a full charge overnight. My rotor slip rings are clean, resistance between the rings is 6.5 "hot"(after a 5 mile...

So a little back story. I've had my '74 a little over 10 years now, riding semi regularly for 9 of those (did a quickie teardown/restore/paint/polish when I first got it). Been following the forum all that time, and have gleaned scads (technical term) of information and help over the years on...

First, kudos to all who give so generously of their time and expertise on this forum. Unlike social media, this platform seems to support a certain level of professionalism and fact based, data driven information that is very hard to find in many forums. The technical writing and general...

'74 TX, all stock. Out for a ride and noticed turn signals not working. Pulled the flasher, dead. Picked up a new flasher, put it in, 3 flashes(heard the flasher, no indicators or signals) and the main fuse popped. Replace fuse (30amp). Pull the flasher, key on, all good. Replace the...

Thinking of taking my bike back to a more stock appearance, investing in some decals, etc. Anybody know of a current product that is a reasonable facsimile? Rattle can through conventional spray rig, I'm not set up for HVLP or anything exotic, my shop technology stops circa 1980. If not a...

So I started on the process last week, and finished up over the weekend. Interesting exercise, there are a few things going on in there that aren't addressed in any of the data I've found on this repair. I'll run through my experience pic by pic. Here's the hub prior to any work, note the broken...

When I had the cover off last year I noticed I had a broken cushion spring. Didn't lose any bits, it appears to have broken neatly in 2 pieces. So I've got the basket off and I'm about to start drilling the original rivets. I've got the Mikes kit in hand. Anybody else done this? Any tips...

So my bike is a '74, though it has had various tins and other peripheral parts replaced prior to my getting it. The hollow threaded stud broke on the right rear blinker, so I need to either run one down or get a whole unit. My question comes from looking at the various exploded views and pics...

When I had my engine apart, I did the standard starter bendix spring squeeze trick, prior the starter had been doing the standard "kick-out" issue associated with the weak spring. Results were ambiguous, at best. But I bought a bike with a kick starter for a reason, so I didn't really worry...

So here are the particulars- '74 TX w/stock carbs(or at least 74-75 style). Left side is a dream, idles steady, quick response(I can open the throttle plate on each carb individually, they are not tied together). Right side does not fire at all at 1200 rpm. If I open the throttle on the right...

Items #2, 3 and 6 in the side cover diagram below. Don't need to be pretty! Thanks! http://www.cmsnl.com/yamaha-xs650-b-1974-1976_model8524/partslist/F-05.html#results

I've been having all sorts of issues with the carbs on my '74. The needle in the right side carb would lift higher than the jet tube and prop the slide full open during hard pulls, the bike doesn't like to idle(I knew I had a buggered up pilot jet on the right side), had some issues with floats...

Started out bright and early this morning for what should have been a beautiful Sunday back country ride to a vintage Japanese bike show in southern PA, 'bout 120 miles round trip. I've been looking forward to taking my bike to this show for the first time since I started putting it together 2...

Twice now I've had the right side needle lift high enough to come out of the jet orifice and jam the slide open. Only happens after a particularly aggressive launch through the gears. The needle is at the factory recommended 4th slot. Any ideas on what is going on? Bike runs great, plugs are...

So I've got about 450 miles on the bike and top end rebuild, and other than some minor annoying issues, the bike has been 100% dependable, starts on 1st or 2nd kick. Took it around the block last night and about a mile from home it shuts off like someone turned off the key. I dick around a...

I've been trying to get the right side carb dialed in on my '74, just can't seem to get it happy, so I went in for a very thorough cleaning of the bowl and jets, peeled off the gasket carefully with a razor blade(flakes of silicone were everywhere, not good), and took my first good look at the...

So I'm about 150 miles into a fresh top end rebuild, just re-torqued the head bolts, getting ready to do 1st oil change and valve adjustment. Bike is running great, but is a bit lean based on the plugs and a wee bit of hunting at steady throttle. Idle is pretty stable, but once in a while will...

Picked this '74 TX650A last March and spent the summer making it pretty and doing the usual, fork seals, clutch pushrod seal, output shaft seal, swingarm bushings, and a lot of polishing and painting. Got it on the road around October and found I was using an excessive amount of oil and leaving...

I've got everything 'cept the cover you remove to change out the elements. Didn't think I needed 'em, but the elements shake out of position and float around behind the side covers. I'm not too worried about authenticity in there, so if I need to I'll just fab something up, but if anyone has a...

I'm putting my top end back together, and have run into an interesting issue. During disassembly, it appears I ended up with an extra short pin for the centrifugal advance rod. I did not take the points cam end apart. The long pin goes in the camshaft, the short pin goes into the advance rod to...