Okay, trivia buffs.
Your monthly challenge.
List specific parts and their dimensions.
Let the brain juices spew...
Your monthly challenge.
List specific parts and their dimensions.
Let the brain juices spew...
-
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What on the XS650 is non-metric?
- Thread starter TwoManyXS1Bs
- Start date
Front and rear rims. I guess 19, 18 and 16 inch diameters. And obviously tires and tubes. Spark plug thread length, can't honestly remember if it is 1/2 or 3/4"....Drive chain has 5/8" pitch, and 0.3" sprocket thickness when stock. Handlebars may be 7/8" in diameter, not entirely sure about that either.
That should be pretty much all imperial measurements on most japanese bikes,AFAIK.
That should be pretty much all imperial measurements on most japanese bikes,AFAIK.
13/16 hex on spark plug AND oil filter nut, LOL
Schroeder valves.
light bulbs.
Schroeder valves.
light bulbs.
The ball bearing(s) in the clutch pushrod / worm assembly...5/16” dia.
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the Handgrips 
peterg
XS650 Addict
Later model ignition coil mount spacing. 4”
Torque specifications
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Speedometer . . . if in mph.
Hmm, what ball bearing ? Lol
My latest bike didn’t even have one
Okay , what about the chain ? Metric ?
Are they? This may be an urban myth, perpetrated by the likes of me.
5/16 0.3125" or 7.9375mm not far from 8mm
the thing is 5/16" or #10 ball bearings WORK there and are easy to find.
Hmm, what ball bearing ? Lol
My latest bike didn’t even have one
hmmmmm....it must be one of the ultra-rare 1986 Yamaha XS650AT automatic transmission models Randy....
If the Bars are 7/8" then the top of the risers must be imperial as well...........top of the stem and cap, as the bottom of the stem, (thread), is metric, so are the cap bolts
Oh, man, youze guyz *are* good.
Some really sharp pencils in here.
Collating your postings:
Wheels (tires, rims, inner tubes, rimstrips) - 16", 18", 19", widths in decimal inches.
Schrader valves - Proprietary dimensions (preceded thread standards, a holdout).
Spark plug thread length - 3/4" (also called 19mm).
Spark plug hex socket - 13/16" (close to 21mm).
Side filter bolt - 13/16" (close to 21mm).
Handlebars - 7/8" (close to 22mm).
Handlebar attachments - Riser clamps and switchblocks with 7/8" ID.
Handgrips - 7/8" left, 1" right, 4-7/8" length.
Drive chain - #530 means 5/8" pitch, 3/8" width.
Sprockets - 5/8" pitch, thickness of 11/32" (0.344")
Light bulbs - BA9 and BA15 bases were originally 3/8" and 5/8".
Steering head ball bearings - Specifically called out in parts lists as 1/4".
Clutch pushrod ball bearings - Specifically called out in parts lists as 5/16".
Later model ignition coil mount spacing - 4” (or is it really 100mm?)
Speedometer and odometer - If in MPH and Miles.
Randy, "Torque specifications" ???
Good list guys.
There's more, we'll let this cook awhile...
Some really sharp pencils in here.
Collating your postings:
Wheels (tires, rims, inner tubes, rimstrips) - 16", 18", 19", widths in decimal inches.
Schrader valves - Proprietary dimensions (preceded thread standards, a holdout).
Spark plug thread length - 3/4" (also called 19mm).
Spark plug hex socket - 13/16" (close to 21mm).
Side filter bolt - 13/16" (close to 21mm).
Handlebars - 7/8" (close to 22mm).
Handlebar attachments - Riser clamps and switchblocks with 7/8" ID.
Handgrips - 7/8" left, 1" right, 4-7/8" length.
Drive chain - #530 means 5/8" pitch, 3/8" width.
Sprockets - 5/8" pitch, thickness of 11/32" (0.344")
Light bulbs - BA9 and BA15 bases were originally 3/8" and 5/8".
Steering head ball bearings - Specifically called out in parts lists as 1/4".
Clutch pushrod ball bearings - Specifically called out in parts lists as 5/16".
Later model ignition coil mount spacing - 4” (or is it really 100mm?)
Speedometer and odometer - If in MPH and Miles.
Randy, "Torque specifications" ???
Good list guys.
There's more, we'll let this cook awhile...
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Ya, I try to not worry bout the torque specs. Right, They are in metric, or French ?
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Speaking of NASA a fair # of the "early" manual metric to imperial conversions had errors.
Seems I remember a Candair crash that was the result of a metric, imperial conversion fuel load error.
Seems I remember a Candair crash that was the result of a metric, imperial conversion fuel load error.
JAX71224
jax71224
The RIDER at least in USA...........
Yup - it was an Air Canada 767 on which the pilot muffed the calculation of the fuel load due to a metric/imperial error and an inoperative fuel quantity instrument.
https://en.wikipedia.org/wiki/Gimli_Glider
The plane had a double-engine shut-down (not an engine failure) due to fuel starvation near Winnipeg on the flight from Montreal QC to Edmonton, Alberta - which is quite the shortfall (more than 1300 km or over 800 miles).
The copilot knew the area and the pilot was an experienced glider pilot - which saved the lives of everyone aboard. The co-pilot recalled that there was an old RCAF base nearby at the town of Gimli Manitoba - and they landed the airplane on it after gliding for quite some distance. The major problem was that the runway was being used as a dragstrip at that very moment and so the car race people had to be warned and evacuate the runway as the aircraft was on its (VERY silent) final approach.
The aunt of a friend of mine was a passenger on the Gimli Glider and she told everyone that there was no panic, but that the cabin got very quiet after both engines shut-down. The nose gear didn't lock-down due to low hydraulic pressure (all they had was the ram-air turbine pump but they weren't flying fast enough to get full system pressure) and so there was some superficial structural damage. However, the aircraft was repaired fairly soon and flown out and re-joined the Air Canada fleet. In fact, I flew on that very plane several times over the years before it was retired and scrapped at the Mojave boneyard.
The entire affair was a close-run thing, but nobody got seriously hurt and it was a he!! of a piece of airmanship - caused by a Grade IX arithmetic error and a failed cockpit instrument.
Pete
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