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Carburetor testing

Started by h2olawyer, June 18, 2008, 11:50:53 PM

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Lucky

#20
June 21, 2008, 09:30:10 AM
Quote from: h2olawyer on June 21, 2008, 02:52:00 AM
Hardest part in the stator job is reconnecting the oil & neutral sensor wires.
H2O

Can't think of any reason you couldn't wire in a double connector for them further up the harness...  or bullit connectors.
1982/3 XZ550 Touring Vison, Gold on Black

h2olawyer

#21
June 21, 2008, 01:36:32 PM
Nice thought, but I absolutely hate cutting up a wiring harness & installing more places for it to eventually fail.  I'll stick with the PITA tiny screws on the sensors.

H2O
If you have an accident on a motorcycle, it's always your fault. Tough call, but it has to be that way. You're in the right, and dead -on a bike. The principle is not to have any accident. If you're involved in an an accident, it's because you did not anticipate. Then, by default, you failed.

QBS

#22
June 21, 2008, 04:16:20 PM
H2, getting back to the original thread subject, Silver V had '82 carbs and Tractor had '83s,...correct?

h2olawyer

#23
June 21, 2008, 04:53:21 PM
No - both sets are 82 carbs.  I picked up a set of 83 carbs at Boulder Bike Works last fall.  I've been taking my time cleaning 7 rebuilding them.  Broke a float post  >:( & repaired it.   ;D  Now wrestling with a severely stuck jet.   ::)  Need to get the 83 tank de-dented, lined and painted silver before I can install the 83 carbs.  However, now that I have a great running set of 82 carbs, I'll be in no hurry at all - except to have the functioning fuel gauge.

After the first 90 miles of my ride yesterday, I filled the tank.  Took 2.1 gallons, so that's right around the same mileage as I got with the original carbs (43 MPG).  Went another 40 miles after that & will be filling it tonight in preparation for a large group ride over the same route tomorrow.  Will do a precise calculation later tonight and again after I get back tomorrow.

Found a cool 3 outlet power adapter @ Radio Shack today.  Has a molex plug and can be used either with a power port (cigarette lighter) or hard wired.  Will just use the power port adapter for now & worry about hard wiring it later.  Also going to use velcro instead of zip ties to hold the helmet cam wire.  Quick & easy to install & remove, making lunch stops easier.  No more worry about someone walking off with the helmet cam.   8)

H2O
If you have an accident on a motorcycle, it's always your fault. Tough call, but it has to be that way. You're in the right, and dead -on a bike. The principle is not to have any accident. If you're involved in an an accident, it's because you did not anticipate. Then, by default, you failed.

QBS

#24
June 21, 2008, 06:04:51 PM
Excellent!  Since both carbs are '82's it would be very interesting know of any jetting variations between the two sets that might explain the performance differences.

h2olawyer

#25
June 21, 2008, 11:36:55 PM
I went through the Tractor carbs when I refurbished it.  It has the same jetting as the Silver V.  122.5 front main, 127 rear main & 135 pilot air jets.  It didn't have the vacuum airbox flapper door and still had the 130 pilot air jets when I got it.  I installed new 135s and had a vacuum box top plus an upgraded carb top & disc air filter, so I did the carb upgrade myself.  The previous owner said it ran pretty good with the original setup.  I have timeslips from low 13 second 1/4 mile runs @ 5,000 ft. elevation with that setup, so it wasn't running bad!

H2O
If you have an accident on a motorcycle, it's always your fault. Tough call, but it has to be that way. You're in the right, and dead -on a bike. The principle is not to have any accident. If you're involved in an an accident, it's because you did not anticipate. Then, by default, you failed.

QBS

#26
June 22, 2008, 05:06:15 PM
So, what do you accounts for the difference in performance?

h2olawyer

#27
June 22, 2008, 08:09:44 PM
Dirt, grunge, crud or muck in the original carbs is the most likely culprit.

Also, I've never had the screw clamps on the stacks @ the airbox.  They fit tight enough I wouldn't think it could make any difference.  When I installed the 83 airbox, those stacks have the clamps, so there's no possibility of any air getting in that way.  But, I still sincerely doubt it was getting past the original stacks, either.  The clamps were removed by the dealer when they did the carb upgrade before I bought the bike, so I never had them.

I'll tear into the original carbs sometime between now and next spring (sounds like a good winter project).  I'll report what I find - if anything.  If they are still clean, I guess I'll chalk it up to air getting past the stacks.

Wrote up another report about today's ride in the Goin' Ridin' section.  Got the best fuel mileage since I bought the bike - 46.67MPG.  For details, check out the ride post.  http://ridersofvision.net/forum/zindex.php?topic=8957.0

H2O
If you have an accident on a motorcycle, it's always your fault. Tough call, but it has to be that way. You're in the right, and dead -on a bike. The principle is not to have any accident. If you're involved in an an accident, it's because you did not anticipate. Then, by default, you failed.

QBS

#28
June 22, 2008, 08:24:02 PM
Just read your Ride Report.  Sounds like you got a whole new bike.  It's great to win.  Let's hope your stator consumption improves as well.

h2olawyer

#29
June 22, 2008, 09:09:16 PM
It really is almost a new bike.  The only thing somewhat familiar is the riding position & I changed that a few weeks ago by installing the 83 rider pegs, brake pedal & shift linkage.  Cheapest "new" bike in history!!!   ;D  I'm easily & comfortably 8 - 10 MPH faster in the corners than before the carb swap.  Part of that is due to the shift in concentration & part is thanks to Keith Code's "A Twist of the Wrist".

I am making a concerted effort to really improve my riding skills by reading more, watching more and most of all, by riding more.  I put 300 miles on the V since Friday.  Now I need to order tires.  Got 5100+ miles out of them.  Need to decide between the RoadRiders or the Sport Demons now.  Whichever I don't get now will be what I order to put on Tractor when it's restored later this summer.

H2O
If you have an accident on a motorcycle, it's always your fault. Tough call, but it has to be that way. You're in the right, and dead -on a bike. The principle is not to have any accident. If you're involved in an an accident, it's because you did not anticipate. Then, by default, you failed.
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