luvmy40

The one still on mine seems to be held on with a spring from the extension to the lower rear skirt assy. I don't see any screw or clamp.

Ha! No idea! I haven't even looked at mine yet. I'm still getting the top end back together.

Any chance you have an extra turn down you can sell now??? I'm looking for one. Hint, hint, hint...

Outside to inside: Screw(needle) spring flat washer o-ring

I'm not sure how close the carb set up is between the '83 and the '86 models but it just occurred to me that, on my carb bank the bracket you are missing is not the same as the one in place. It incorporates a spring retainer for the throttle linkage and has a cut out for the push-pull throttle cable. It may not be that easy to fabricate.

Yamaha part # 12R-14105-00 is what I got for my '83 The air screw should be that same for any model year/model with these carb bodies the differences should be in the jet sizes.

I just got four sets from my local Yam shop for $6.00/ea. Screw, spring, washer and o-ring.

Check with your local R/C hobby shop for the small e clips and bushings. I picked up a variety pack of clips from one for $3.00 and it had clips for the enricher circuit linkage. That top bracket should be easy to fabricate.

I've got to get her back together and running again, but it sounded like she was only hitting on 3 cylinders at idle and low throttle but every thing sounded good at WOT. I had spark at all plugs and got a good sync but was still missing badly at idle. Three of the coils tested bad on the bike but then tested good at a later date off the bike. I have another set of coils and caps and new wire. I'll put together a set with the best numbers I can. I cleaned the carbs(twice) and got new air screws as the o-rings were in very bad shape and one was missing the spring. The diaphragms all looked good and they pass the swish test. All but one of the 16 valves were out of spec. A couple were severely out. One is near zero clearance. I have the shims to bring them all back to the max speced clearance(hopefully). The TCI connections were hideously nasty. It looked like it had spent a good bit of time under water. I cleaned them up as best I could and will probably revisit them before I put everything back together. My past experience with the Yamaha CDI/TCI boxes is that the bike either runs or it doesn't. I see that may not be the case with the Ventures. I hope to have everything back together for a test run later next week.

Shakin'

OK, the shim removal tool for these bikes is officially the biggest PITA I have ever had to deal with. The Yamaha XJ shim tool is close but there are some very simple work around methods that make it obsolete anyway. The Suzuki GS series shim tool is an exercise in simplicity comparatively speaking. A simple shepard's hook with a cam milled into the sides that can be used in nearly any cam position and rotated manual without turning the crank. Anyway, enough whining. Thanks to Flyin fool for straightening this old dog out on a simple matter that I refused to see! I got all my clearance measurements and a good start on documenting the shim sizes in place. 5 of the sixteen are within tolerance but 2 of those are on the extreme tight side of spec so I will probably change those shims too. One intake valve on cyl. 2 is I'm done for the night, I'll pick it back up tomorrow afternoon.

I have read in several other manufacturers' forums that a simple Ohm reading across the coil connections(back through the TCI sans coil) will show definitively if the TCI is bad but not necessarily prove it good. I.E. a low resistance reading means a bad circuit and thus, a bad TCI but a high reading just proves that particular circuit is not bad. No one could give a resistance range for good or bad, just extremely high or low. Would that test prove anything on the 1983 first gen TC!?

The 1980 850 Special shouldn't be a YICS engine.

Yeah, that's the tool for the XJ engines. Just to be clear, Yamaha doesn't mention capping the ports for sync on the Venture and you should be able to get good results just leaving them alone. However, I have read that the YICS chamber on the Ventures is prone to developing leaks with age. That's why I removed mine.

I'd ask the seller if he's experienced any of the '82 teething issues(starter/stator/stumble/etc.), but if I wasn't in the wrong country, broke and already up to my arm pits in a "new" Venture project, I'd be all over that!

The YICS tool(at least one of them) is for the XJ series engines where the YICS chamber is milled into the head. No YICS tool needed on the 83 Venture. You can disconnect the YICS lines and cap the ports during synchronization if you want. I just left mine capped off and removed the YICS chamber. On a side note, I have seen mention in several different places of connecting the YICS ports front to back with vac line. It supposedly enhances fuel mileage...? YICS is one of those engineering designs that works great on paper and should, in reality make a difference but doesn't seem to have much practical effect.

Yeah, it's my kids' fault! That's it!

move the clamps off the nipple and twist the hoses when they're good and warm. Then replace them. Once they stick they aren't going to seal up very good again. The nipples should be metal in most cases. Just split the the hose on the nipple with a razor knife and pull them off with pliers if they are too stubborn.

I make concealed carry and competition gear. Kydex/Boltaron thermo formed IWB and OWB holsters, mag carriers, flashlight carriers and custom stuff. I'm actually a pioneer in Appendix Carry dedicated holsters. I do believe I made the very first Kydex holster specialized and designed specifically for concealing in the appendix position. customcarryconcepts dot com Kydex works well for repairing broken tabs and such on the body panels and can be molded to make new parts as well. Made the tail cover and license plate mount out of .125" Kydex to purdy up the bubba bob job a P.O. did on my Katana a while back. That turned out nice and was not difficult. I'm going to have a good bit of repair work to do on the Venture soon. It's not beat up too badly but there are a lot of missing tabs and spear points(bullets?) and a few cracks. I don't think there are any missing pieces.

I should have said "Rearrange" There was little if any cleaning done! But, this is after!

I own two or three of nearly every tool I have. 'Cause I can never find it when I need it!

Glad to hear that I'm not the only one! I worked as a in home repair tech for a local radio/TV shop when I was in High School then went into the Army as a communications tech. Many years as a parts changer/ tank driver/truck driver/ etc, a trip to Europe then the sandbox and back into the civilian market where I found the digital world had left me in the dust. I got out of the electronics game and went Mechanical only to go back designing controls for refrigeration and lighting systems for genetics and agricultural testing chambers. Then onto being an ET for the Post Office, which is more like a system tech than an electronics tech. Somewhere along the line I built a few dozen houses, apartments buildings and custom kitchens. Now I make holsters, sell auto parts and wrench on vintage Japanese motor cycles. I'm very busy but relaxed these days though not so wealthy. I like being relaxed.

I really envy the garages and shops of people who have organizational skills and will power! I'm a pack rat of the worst kind. One with no organizational skill at all. I have parts and SAMS Photofacts for Curtis Mathis TVs. I haven't worked as a TV repair tech in 35 years. I can't throw them away. It's a sickness! So, today I set out to clean up my "shop" in order to make room for the new Venture. She's been parked in the driveway and tarped since I pulled the carbs. This spring I walled off the back half of a generously sized 2-1/2 car garage (that's never had a car in it) to isolate my holster business for tax purposes. Of course, everything that got moved from the new business area just got stacked willy-nilly where ever I could put it in the front half. I also recycle cardboard. That means I pile the boxes up in the garage until I can't move around it anymore then haul it to the recycle center. Usually a couple trips a year. I just made a cardboard trip last week. I found another truck load+ today! Now, My son has his '81 SECA 750 partially stripped with parts scattered as bad or worse than I would have so that was the first step, consolidating that project in limbo to one area. Then I made a very difficult decision to throw some old golf gear and workout equipment out to road. http://i206.photobucket.com/albums/bb258/luvmy40/Motor%20Cycle/Resized_20160823_211033_zpsopegopo0.jpeg There's still more cardboard to be hauled off but I squeezed both bikes in and still have room to move around the Venture! I'm actually surprised and kind of proud that I was able to find the will power to do this without a task master to keep me on point. Baby steps!

The new valve cover gaskets arrived today and the bolt seals were here last week. Now I just need to clear a space in the garage so I'm not splitting her open in the driveway. I hope I can get the old girl up and running before the season is completely gone.

I'd go back to the shop you paid six hundred $ to clean/rebuild your carbs and raise hell! Not doing as good a job as I would is one thing. But putting them back together wrong and losing parts?!! Absolutely unacceptable!