Crash Bungs

[fazersharp]

Hey cool ------------ im glad I was able to help
The angle of that photo makes them look quite obvious but in real life I think they look almost like part of the frame

[Arfa]

A lot really depends on the crash bung/bobbin. Some are a lot more rigid than others and will transfer the stress to the frame, whilst others are more malleable and tend to bend or fail where exposed to too much stress. Some bobbins bolt in a one point, other at two points with a small T shape member.


I had the original Yamaha ones fitted, going through the belly pan, but after an low speed (~20mph) drop and short slide, this is what happens:





These have a T shape member, which tends to just give on a slide. Good in that it doesn't put too much stress on the frame, but bad in that the bobbin then bends flat against the crank cases and breaks the belly pan it's protruding through. They do bend back fairly easily with mallet, but one of mine is about the snap off completely. Seriously considering ditching the belly pan and going down crash bars route.

[tatastha-sakti]

I've heard many stories how protection sliders caused more harm to the bike. Especially, when it slides down not very good surface. Most riders in Russia use such kin of protection:




I personally have these and  they are great. I know that previous owner fell twice on 50-60km/h on the corner (there was sand :] ) and once fell my girlfriend. Bike is OK, these Crazy Irons are also fine. But if you have a belly pan, then I'm not sure if you can install them.

[fazersharp]

Shit mate !!! Bad news

They do bend back fairly easily with mallet

But your belly dont.
This Im sorry to say is a prime example of a bung causing more damage than its sposed to prevent. If they were not fitted then yes you would of had a nasty graze down the bellypan, but thats it.
Our bikes just arnt suited to crash bungs - mushrooms. The bung makers have come up with a great product for some bikes and then thought "how can we max our profit" and then come up with a stupid workaround to sell to all other bikes. Just because they make em for a bike--- dont mean they are suited to a bike.

[fazersharp]

Tatastha
Would be daft if it did ---- but does that bar tha passes round the back of the engine, cover the oil filler cap

[tatastha-sakti]

fazersharp, no, the cap is perfectly accessible

[Geordi Sussex]

These have a T shape member, which tends to just give on a slide. Good in that it doesn't put too much stress on the frame, but bad in that the bobbin then bends flat against the crank cases and breaks the belly pan it's protruding through. They do bend back fairly easily with mallet, but one of mine is about the snap off completely. Seriously considering ditching the belly pan and going down crash bars route.

Just a question,
Where can you get the belly pan mounts from?

[Arfa]

Just a question,
Where can you get the belly pan mounts from?

Yep, good question. You could try TCP and see if they will sell mounts/bobbins alone. Pretty much every other bobbin I've seen on the market has just one long straight bolt through to frame, and so just won't line up with this pan. I suspect I'd have to get some new ones fabricated.

That said, due to these bobbins not really protecting the bike much, I'd be more tempted to put the money on some crash bars. Especially as I'm using the bike just for London commuting in the main.

[TheGHunter]

Ive fitted R&G bar ends, frame crash bungs, front axle bungs, Rear axle bung, casing sliders and swingarm bobbins.
Probably get some crash bars in the future as all this protection pays for itself the first time you have a spill of any kind.

Any pic of the bike with these attached ?