Crash Mushrooms pros and cons , Are they worth fitting?

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Crash Mushrooms - Are they worth it?

The Pros and Cons of crash bungs and which ones to buy


Crash mushrooms are specially design stoppers that bolt onto the outside of your bike. The idea for them is to protect the bikes body work and engine in the event your bike ends up going down the road on its side, as such they could be considered one of the more important bike accessories. They stick out a fair way so when the bike tips or falls over the first thing to touch the ground are the bungs. Sounds like a no brainer, but there's a reason some people choose not to use them.

If you're considering whether or not they are worth it, here I've gone over points For and Against crash bungs, and also provided a few tips on what to look for if you decide to buy.


Saved fairings - With crash protectors installed, they protrude out enough that when the bike is on its side, only the protector, bar end, pegs and wheels should touch the ground. This then keeps your shiny fairings relatively untouched if it goes down on tarmac.

We all know fairings aren't cheap, so for the sake of £50-£60 on bungs you could be saving £200-£300 for fairings. Also if you don't carry spare fairings it means you need to try and bodge your broken ones to get it acceptable to carry on riding.

Save engine casing - As with above, the bung stops the engine cashing touching down. A cracked or broken engine casing could very much mean the end of your day.

Smaller crashes leave next to no damage - With crash bungs installed, you're more likely to be able to just pick the bike back up and ride back in after a small, slow speed 'get off'.

Theoretically, there's fewer costs long term - If every time your bike goes down it lands on the engine casing and fairings, unless you're a master of fairing repairs (or you're happy to just Gaffa tape it up), you're going to be looking at new fairings every time, and that's not considering possible peg, lever and tank damage etc.


Possibility of catching and flipping bike - In higher speed crashes, the crash bungs could end up catching on a kerb or digging into the ground if you end up on grass which could cause the bike to flip. If the bike starts flipping you could see all sorts of damage all over the bike.

On the other side of this, I've seen many a MotoGP bike flipping and battering itself into a scrap heap and they don't use them. While they could cause the bike to flip, it's not the only thing that can.

Possibility of damaging engine bolt and thread - Given enough force, the crash bung and bolt could be ripped right out, meaning more awkward and potentially costly repairs to get the engine mount rethreaded and fix any frame damage because of it.

They become almost irrelevant in gravel or soft earth - If you happen to slide into the gravel or soft/marshy grass, the effects of the bungs will be almost wiped out and fairing damage it pretty much a dead cert.


There is definitely the potential to cause more detrimental and costly damage to a bike in higher speed crashes with crash bungs fitted if it catches and sends the bike tumbling. However, looking over the long term and assuming everyone doesn't have bottomless pits of money and spares then surely they make good financial sense.

In the end though there is no definitive rule to how a bike crashes as so many variables come into play, so just think about your personal circumstances and how each point would affect you.

If you do decide to buy, then it is a MUST that you invest in a set where the manufacturers reputation hangs on how good their product performs. Use the following tips to help you get a set of bungs that stand the best chance of keeping your pride and joy safe.

Buying good quality crash bungs

Where are they positioned? - Around the middle of the side fairings using one of the main engine bolts through the frame is the best place. If they are fitted using the same bolts that hold on the fairing, when the time comes that they're needed it is highly likely they'll simply snap off or be bent to the point they're unusable.

Are they good quality plastic? - This is a hard one to determine, but the price is actually a good gauge of how good the quality of the product is. If you see bungs online for £10, you can be sure they'll be made from goats cheese or similar.

Even more so if it's a popular brand whose reputation is as good as their product, you can be sure the quality of materials are going to be some of the best on the market.

If it looks too good to be true, it probably is - As mentioned above, if you see a supposed "great quality" set of crash bungs at an unbelievably low price I would exercise caution. You will pay a premium on brand name products as with anything, but it's what they do for their business so if they didn't work they wouldn't be in business very long. Jaybeebikerbits have been in business since 2002 

Please be aware of chinese imports they are very cheap for a reason. I have purchased many sets just to check what the competion is selling. And i would say 95% is a complete waste of money. I have found the platic part to be made of very poor brital material, very thin wall sections  ( this means that they will grind down very fast and will only protect your expensive fairing, engine casing etc, for a very limited time)
the hard ware used , asin the nuts and bolt etc. are substandered . And there tends to be no detailed fitting instructions.

I have been designing and making crash protection for motorcycles for over 11 years now and have vast experience of what works and what does not work. Previousley to this i was a injection mould tool maker , producing plastic fairing parts for bikes and all manner of car / auto motive parts. This has helped in the choosing of the correct material for the job, and i have a good access to full tesing matrolagy lab.

Hope this helps a little, if you are asking the question, should I or shouldnt I
click links below to go to my  shop



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