-
Enjoy XS650.com? Consider making a donation to help support the site.
XS650.com receives a small share of sales from some links on this page, but direct donations have a much greater impact on keeping this site going.
What have you done to your XS today?
- Thread starter I am Carbon
- Start date
-
- Tags
- maintenance
Thanks old man... I hope to avoid the necessity... I have three frames and engines and buckets of bits and one is a runner, another one a hardtail...but I am not much interested in working on or building scooters anymore, getting nearer to the end of the twig... the runner seems quite sound yet, weeps a little at the gaskets goes like the wind... (the 50/50 graphite lube oil goes back to the flood, but I actually keep a can of it left over from a job in the 1980's - one makes it up one the job, very oldtimey) Thanks fellas copper A/S for the old gal it is
I am fairly sure I have now by experiment and research understood the tire pressure question. It is that there exists more than one mechanism of pressure loss in the matter...more or less motorcycle tires, in this inquiry. It seems that there is permeability, in which case larger molecule gas would leak slower than air... And! Solubility. Evidently some gases and the elastomeric material of inner-tubes and tires are mutually soluble, and a differential density results in condensation-evaporation through the "solute" (which it is) of the tubes and or tire. Solubility reigns.
CO2 acts as an organic solvent in the experiment...and it "leaks" (actually evaporates through) faster than air. The fact that it's a larger molecule seems to be a difficult thing to account for experimentally...but my science fair is finished... best gas tire is (probably so far) air. But I wonder about silicone oil films...
CO2 acts as an organic solvent in the experiment...and it "leaks" (actually evaporates through) faster than air. The fact that it's a larger molecule seems to be a difficult thing to account for experimentally...but my science fair is finished... best gas tire is (probably so far) air. But I wonder about silicone oil films...
Aham a tinkin 'bout 3 drops DOT 5 si through the schrader valve tube ... if I feel like more 'spirimentin'. I remember from a longlongtimeago the Si "oil" doesn't have problems with rubber bits, from a brake lecture in 1980...big sales pitch for DOT 5, with an open bar!... I would not try this with a tubeless tire...maybe Si makie slip on rim...I am fairly sure I have now by experiment and research understood the tire pressure question. It is that there exists more than one mechanism of pressure loss in the matter...more or less motorcycle tires, in this inquiry. It seems that there is permeability, in which case larger molecule gas would leak slower than air... And! Solubility. Evidently some gases and the elastomeric material of inner-tubes and tires are mutually soluble, and a differential density results in condensation-evaporation through the "solute" (which it is) of the tubes and or tire. Solubility reigns.
CO2 acts as an organic solvent in the experiment...and it "leaks" (actually evaporates through) faster than air. The fact that it's a larger molecule seems to be a difficult thing to account for experimentally...but my science fair is finished... best gas tire is (probably so far) air. But I wonder about silicone oil films...
olewahrhorse
XS650 Enthusiast
Yesterday, I took my rear wheel to Cycle Gear because a nail had found its way inside the tire. It was "Black Friday Sale", so I was hoping for a price break. Nope. That was not on sale. The new tire label said "No repairs possible". Since it was the same tire I had on already, I bit the bullet and had a new one mounted. They told me "2 days". OK. I saw a bunch of wheel waiting so I figured they weren't blowing smoke. Good news. Less than 24 hrs later, a text and a voicemail said "it's ready for pickup!" This afternoon, I went and got it and reinstalled it. Checked the sparkplugs since it had been a while. They were OK.
BTW It was a Shinko 777 tire. They are usually less pricey and grip like velcro, wet or dry. Tire life is pretty good. That said, I am not hard on my tires.
I would attach pics if I could find them.
BTW It was a Shinko 777 tire. They are usually less pricey and grip like velcro, wet or dry. Tire life is pretty good. That said, I am not hard on my tires.
I would attach pics if I could find them.
Commuter
"flying is easy: aim for the ground and miss!"
I've made up a truing jig for my wheel rebuild. So long as the wheel bearings are ok, its ok to just use a couple of vees sawn into some scrap wood. I have since stripped down the wheel completely and its ready for cleaning up.
Nice job!
I made sommat similar:
Yebbut, yours has a door.
Commuter
"flying is easy: aim for the ground and miss!"
Continental GT250?
GaryInVA
XS650 Enthusiast
It leads to the Tardis.
Close, Bullet 500 but some PO has had the good taste (?) to fit what in my yoof were called bacon slicers. Gives the bike a slice of GT250 street cred. Maybe.
I don't see a door, I see a handle. And my work bench has a handle too. We mustn't go seeing things that just aren't there . . .
No, it leads nowhere except to an inexcusable digression from this thread.
Sorry!
You have to rig up some way to keep the wheel from shifting side to side on the axle or you won't have much luck trying to true it, lol. I shim the wheel in my stand with washers and/or spacers .....
Also, one side of my stand is adjustable so I can level the axle .....
Also, one side of my stand is adjustable so I can level the axle .....
Commuter
"flying is easy: aim for the ground and miss!"
TBH I prefer to work along the lines of KFS. For wheel building and trueing, all I need is good wheel bearings. When the tyre and tube are on the completed rim I shall need to set up level and without any binding in order to ballance.
...with a doorknob, no less!
Nvrlonuf
XS650 New Member
Well, Hi there @Nvrlonuf! That's a good start then, what do you intend to do with your XS? Looks like you've got a few more bits n pieces to collect?
Why not start a build thread for your project? Plenty of photos, ask questions when you need to. BTW, what do you like to be called? Cheers, Raymond
Why not start a build thread for your project? Plenty of photos, ask questions when you need to. BTW, what do you like to be called? Cheers, Raymond
Nvrlonuf
XS650 New Member
Hi Raymond. Name is Dale. Not totally sure where to go with it yet. Bunch of ideas in my head. It Came with a bunch of parts, motor etc. will need to start a list of haves/needs and go from there. a build thread maybe a good idea, help me remember what I’ve done haha, in storage at the moment so probably dream a little until I’m ready. I’m sure I’ll be asking a ton, havent built a bike before p, should be interesting.
thanx for reaching out.
Removed the BBK'd engine that has no compression to see if I can diagnose it on the bench.
Next, going to take the engine out of the '76 and put it into the Special.
Then I have a freshened match numbers engine to go into the '76.
Going to be busy holiday season!
