[Cbib46]

I have the same problem, each time I ride under the rain. The water splashes onto by back, then goes down onto my seat. My seat turns into a paddle and my butt gets wet.
I have added an 20cm wide aluminium sheet between the rear light and the registration plate. There is a lot less splash but I will still get my butt wet after 45 minutes.
Any idea how to stop getting splashed in the back?
I have reached the point where I am thinking buying another bike

 

[Cbib46]

Thanks mate

 

[Cbib46]

Fingers crossed

 

[Cbib46]

@Delbert: As I said previously I have added a 20cmx40cm underneath the mudguard. It is much better, I can ride for longer before getting my butt wet.
Today, I was washing my bike with the hose. I started to splash the registration plate with the hose like the water is coming from the rotating tyre. To my amazement, a lot of water ended up on the top of the bike. Reason: the water goes between the reg plate and the sheet I added.
I have just ordered another aluminium sheet and cutting tool to fill the gap between the reg plate and the sheet already in place.
I ll let you know the results.

 

[Cbib46]

Not been out yet but I don't think it looks too intrusive, if it makes no difference I'll just take it off

I tried that in the past...0% improvment

 

[Cbib46]

here is my attempt

 

[Cbib46]

just need the rain.... As i live in the UK, I shall not wait for long

 

[Cbib46]

I have done the water jet test, it is a success. Waiting for the rain for final test

 

[Cbib46]

Some goods news and bad news.
The good news is that it does work.
The bad news is that the reason of splash in the back has 2 root causes. The first root cause is definitively the splash coming from the water crashing on the reg plate. So my DIY works.
I think the other root cause is the water splashing between the reg plate and the rear light. I did put a 20cm wide aluminium sheet, so I can only imagine it is not wide enough.
I ll order a 25cm and a 40cm ones and will let you know.

In the meantime, I saw this mudguard much cheaper than the one you had in mind:
Rear Mudguard for Suzuki GSX-S 1000 F / S Katana hugger Zaddox LW6 black

 

[Cbib46]

Fingers crossed!

 

[Cbib46]

I did not have time to try on my side. I ll keep you posted and thanks for the feedback 👍

 

[Cbib46]

Did you try with a short tail too?