There's a reason they designed it the way they did. Ever see what happens to a boat tank (the red plastic ones) when sitting in the sun for a while? Park in the sun, your fuel is going to expand. Do this mod, and there's no place for it to go other than force a leak out at the weakest point in...
I share your wish to make it more sporty, lighter, etc.!
Which forks are on your bike?
Where to get the custom cnc triple clamp?
Is the vid posted yet for the intake pipes / can we buy a set from your friend?
This group in France made a silver R18, looks beautiful, better than stock, with subtle modifications: https://www.fcr-motorcycle.com/
And it looks like they have a great exhaust option and carbon fiber valve covers, reasonably priced:
https://fcr-accessoires.com/en/79-accessoires-bmw-r18
Hello. Bill from West Central Florida here. Long time BMW enthusiast, multiple R1200C owner, expert in the R1200C, also have R1200S, K1200S, have had R51/2, RnineT, K1200RS, R1150R. When the R18 was announced, I said yeah, will need one of those. Then I saw it and hated it!! What were they...
It's almost exactly the same design as the 1950 bike I had; amazingly, the same twin cam setup which they moved away from in 1951 for various reasons, and now it's returned. The R18 brakes will be a lot better than the 1" wide drums were on the R51!!