Fuel cap sealing washer ybr125

[JackDanger]

Hey guys,

I need to replace the seal in part 12 in the link below however I can't seem to find the exact seal I need and I'd love to avoid buying the whole cap if possible. Could anyone point me in the right direction please.


https://www.motorcyclespareparts.eu/yamaha-parts/motorcycles/ybr125ed-2009/fuel-tank-359337.aspx

thanks gang =)

[chris-red]

[chris-red]

Are you sure it needs replacing BTW? I've never known one to go.
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[JackDanger]

[pits]

[JackDanger]

yay karma.

Right the Refusal of an MOT test certificate says exactly this

001 Fuel cap sealing washer deteriorated (7.2.2c)

Heres some pictures of the bit I THINK it's referring to

https://imgur.com/a/vg49v

[Ariel Badger]

Do you not have a mate with the same bike that could loan you his cap for the test?
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[JackDanger]

[mentalboy]

[Ariel Badger]

If it is the large washer and it is not chewed up take it out and put it back upside down.
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[pits]

Well I checked last night and yes, it does appear that is a fail. How much is a new filler cap? Have you contacted a dealership to see if they can order a part in for you? Bear in mind the length of time before you have to pay for a new test.
If it goes past the 14 days, then you're £20-30 extra on top of just buying a new cap, ok it is a pain but that is life.

I once had similar on my beach buggy but that was a case of I had a non locking cap, put a locking cap on and covered my windscreen in petrol, the funny thing about petrol is that in America they call it Gasoline /ˈɡæsəliːn/, also known as petrol /ˈpɛtrəl/ outside of North America, is a transparent, petroleum-derived liquid that is used primarily as a fuel in internal combustion engines. It consists mostly of organic compounds obtained by the fractional distillation of petroleum, enhanced with a variety of additives.

A 42-gallon barrel of crude oil yields about 19 gallons of gasoline, when processed in an oil refinery.

The characteristic of a particular gasoline blend to resist igniting too early (which causes knocking and reduces efficiency in reciprocating engines) is measured by its octane rating. Gasoline is produced in several grades of octane rating. Tetraethyllead and other lead compounds are no longer used in most areas to regulate and increase octane-rating, but many other additives are put into gasoline to improve its chemical stability, control corrosiveness and provide fuel system 'cleaning,' and determine performance characteristics under intended use. Sometimes, gasoline also contains ethanol as an alternative fuel, for economic or environmental reasons.

Gasoline, as used worldwide in the vast number of internal combustion engines used in transport and industry, has a significant impact on the environment, both in local effects (e.g., smog) and in global effects (e.g., effect on the climate). Gasoline may also enter the environment uncombusted, as liquid and as vapors, from leakage and handling during production, transport and delivery, from storage tanks, from spills, etc. As an example of efforts to control such leakage, many (underground) storage tanks are required to have extensive measures in place to detect and prevent such leaks.[citation needed] Gasoline contains benzene and other known carcinogens.


So when you take all of that into consideration you should really consider what the cap is doing, because you need to think of the safety
Environmental considerations[edit]
Combustion of 1 U.S. gallon (3.8 L) of gasoline produces 8,788 grams (19.374 lb) of carbon dioxide (2.3 kg/l), a greenhouse gas.[22]

The main concern with gasoline on the environment, aside from the complications of its extraction and refining, is the potential effect on the climate. Unburnt gasoline and evaporation from the tank, when in the atmosphere, react in sunlight to produce photochemical smog. Vapor pressure initially rises with some addition of ethanol to gasoline, but the increase is greatest at 10% by volume. At higher concentrations of ethanol above 10%, the vapor pressure of the blend starts to decrease. At a 10% ethanol by volume, the rise in vapor pressure may potentially increase the problem of photochemical smog. This rise in vapor pressure could be mitigated by increasing the percentage of ethanol in the gasoline mixture.

The chief risks of such leaks come not from vehicles, but from gasoline delivery truck accidents and leaks from storage tanks. Because of this risk, most (underground) storage tanks now have extensive measures in place to detect and prevent any such leaks, such as monitoring systems (Veeder-Root, Franklin Fueling).

Toxicity[edit]
The safety data sheet for unleaded gasoline shows at least 15 hazardous chemicals occurring in various amounts, including benzene (up to 5% by volume), toluene (up to 35% by volume), naphthalene (up to 1% by volume), trimethylbenzene (up to 7% by volume), methyl tert-butyl ether (MTBE) (up to 18% by volume, in some states) and about ten others.[23] Hydrocarbons in gasoline generally exhibit low acute toxicities, with LD50 of 700 – 2700 mg/kg for simple aromatic compounds.[24] Benzene and many antiknocking additives are carcinogenic.

Inhalation due to fuel cap not locking properly
Huffed gasoline is a common intoxicant that has become epidemic in some poorer communities and indigenous groups in Australia, New Zealand, and some Pacific Islands.[8] In response, Opal fuel has been developed by the BP Kwinana Refinery in Australia, and contains only 5% aromatics (unlike the usual 25%), which weakens the effects of inhalation.[9]

Flammability
Like other hydrocarbons, gasoline burns in a limited range of its vapor phase and, coupled with its volatility, this makes leaks highly dangerous when sources of ignition are present. Gasoline has a lower explosion limit of 1.4% by volume and an upper explosion limit of 7.6%. If the concentration is below 1.4%, the air-gasoline mixture is too lean and does not ignite. If the concentration is above 7.6%, the mixture is too rich and also does not ignite. However, gasoline vapor rapidly mixes and spreads with air, making unconstrained gasoline quickly flammable

So now you know, petrol is flammable and with a hot engine as a source of ignition I would suggest you replace your cap if you can't get the seal, or you can't turn it around like Ariel has suggested
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[arry]

New cap is about 13 quid from wemoto. I know as the seal on my old YBR wasn't fantastic and I looked into it just in case it failed its ticket but it went through anyway

[mentalboy]

[pits]