The CB1100 Community Forum

Guys,

I rode to work yesterday no problem. On my way home the bike had a mind of it's own. Steering got heavy and my back tire was drifting. I pulled over and sure enough I had a flat tire. Now My first instinct was crap I don't have a flat kit or a pump. Luckily my coworker spotted me and filled up my tire. I noticed it was a slow leak so I rode to my dealer (mile away) cautiously. I asked them to fix my tire and they said they do not patch or re-stem tires??? They said I'd have to buy a new tire. The only one they had in stock was $190 for a michelin extended life tire... No thanks. I checked my PSI and my tire was still full so i thought screw this I'll ride home and order a tire online. The dealer said 140-70-18 tires are hard to find and expensive.

Fast forward to today i checked my tire this morning and it's at 36psi. Last night it was 42psi. wtf when I left work it was completely flat. Should I buy a new tire or have someone re-stem it?? No noticeable holes or nails in the tire so think the the valve is the problem. I am stumped right now.

Maybe the core is loose? If you have a core tool, try tightening it up.

Most dealers won't plug a tire due to liability. Don't know why they wouldn't put a new stem in though. What if you wanted a angled valve stem put in? Like a lot of us have.

(05-12-2017, 01:27 AM)Lord Popgun_imp Wrote: [ -> ]Maybe the core is loose? If you have a core tool, try tightening it up.

Most dealers won't plug a tire due to liability. Don't know why they wouldn't put a new stem in though. What if you wanted a angled valve stem put in? Like a lot of us have.

I don't have a core tool. Can you recommend one?

Not anything in particular. You can get them at auto parts stores. I have one with a handle, and a few that are like valve caps. For bicycles, I think. Screw on the valve stem and the other end is the core tool. Works on any Schrader valve though. And some are a 4 way tool. Google valve core tool and you can see them. They are cheap.

The tool this really just a little tube with a slot cut in it. Fits over the core and engages the shoulders, or whatever they are called and then screws it in or out.

The core has a rubber seal that can perish. You can buy valve cores at the auto parts place too and replace yours if desired

Most auto parts stores should have them . Green slime is one brand that has various accessories .

to check the stem, remove cap and put either a dab of spit or some dish soap mixed in water on it, if it blows a bubble it's leaking. If it doesn't there is another problem

I'd suggest dousing it with a spray bottle full of water and dish soap to find the leak rather than speculating. Might be a valve stem, might be something on the bead from when it was mounted, or a small puncture. Cheapest/only way to find the source.

Yeah, I picked up a nail recently. Dealer said due to insurance regs couldn't plug, only sell me a new tire. $20 bucks and a good six pack of beer to the mechanic and tire plugged - I had brought in the wheel.
Another bike I own eats schrader valves, no dea why. I carry a spare and have a bag of them at the house.

A tire pump is a good idea.

Depending how old your tire is, you may want to go ahead and replace it. Murphy says only new tires attract nails, so I assume yours is fairly new. If so, I'd find someone to plug/patch it. If it's ready for replacement, Chaparral Motosports (online) and Revzilla can sell you the tire you need. They're not hard to find.

My rear tire was punctured by a wood screw at approximately 6,000 kms ... proves that theory that only newish tyres with plenty of service life get punctured!! I used a tyre plug (the rubber mushroom variety not the sticky wick) to get me back on the road again with thoughts to immediately replace the tyre for all those safety reasons you hear about. Having ridden another 2,000 kms without any loss of air pressure I'm of the mind to just leave that tyre on. There are plenty of people who will swear by a plugged tyre and plenty who will advise you to get it replaced. Wondering if anyone has had experience with a rubber tyre plug go wrong??