Air guide/spark plug cover orientation

[darrsi]

Greetings,

very randomly I ducked to check out my bike and I noticed (after a long time figuring it out) a rubber part, that is the air guide/spart plug cover with the ID 4YR-2137Y-01-00, hanging low a bit and touching the engine, specifically the valve cover. According to other photos I found online, only the triangular spiky part should be visible from the sides, while mine are touching the hot engine. The flaps that are hanging don't have attachment points and I guess should be tucked in somewhere, but I don't know where.

Please google the ID so you get a better picture if you'd like to help, because I don't know why can't I upload photos here.

Thank you in advance.

A bit like this, been like this since I got it 

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As it should be, Item 30 one fixing to front of frame.

Greetings,

very randomly I ducked to check out my bike and I noticed (after a long time figuring it out) a rubber part, that is the air guide/spart plug cover with the ID 4YR-2137Y-01-00, hanging low a bit and touching the engine, specifically the valve cover. According to other photos I found online, only the triangular spiky part should be visible from the sides, while mine are touching the hot engine. The flaps that are hanging don't have attachment points and I guess should be tucked in somewhere, but I don't know where.

Please google the ID so you get a better picture if you'd like to help, because I don't know why can't I upload photos here.

Thank you in advance.

What it does

1. Water protection

• It helps stop rainwater and spray from getting directly onto the spark plugs and plug caps.
  
• This reduces the risk of misfires caused by moisture getting into the ignition system.
  

2. Dirt & debris shield

• Keeps road grime, dust, and small debris away from the plug wells.
  
• Spark plug recesses can collect dirt easily, which can cause problems when removing plugs later.
  

3. Heat management (minor role)

• It slightly directs airflow and shields components from direct heat or turbulent air, though this is secondary.
  

4. Electrical reliability

• By keeping the plug area dry and clean, it helps maintain a consistent spark and smooth engine running.
  

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⚠️ If it’s missing or damaged

• You might get rough running in wet conditions
  
• Increased chance of corrosion around plug caps
  
• More dirt buildup in plug holes
  

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? Bottom line
It’s a simple but important protective piece. The bike will still run without it, but keeping it in place helps long-term reliability—especially in typical UK wet weather.
If yours is loose or perished, it’s worth replacing.

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Where it's positioned in Faze2's photo is normal, don't move the rubber flap any further back because it will encourage water towards the spark plug area.
On the side of the engine you'll see water drainage holes, these need to be kept operational and clear of any blockages. The same as keeping the area clean and clear of debris around the spark plug area, as previously mentioned any junk there can not only block the drainage holes, but if you remove a spark plug you really don't want crap falling into your engine.