Do you weaken your chassis when you cut off...

[Guest]

the rear 'fender holders' (no idea how it is called in perfect English...)

the metal bars leading to the rear blinkers (blue rectangle in picture)

would like to move to a more 'café racer style'...

[78550GS]

Just don't carry a passenger.

Honestly, I'm not sure, but someone will be by with more than I can offer.

[wymple]

Not as long as you bridge between the rails back there around the shock mounts. Even if you don't I doubt it means anything.

[Steve]

We don't know what they are called "in perfect English", either, we speak 'Murican here.

If you look across the back of those frame extensions, you will see a brace that holds the seat lock.

I am no engineer, but I would guess that it does provide at least a modest amount of rigidity to the rear portion of the frame.

The one bright spot here is that, with that removed, you will no longer be able to carry a passenger, which is probably the reason that brace was installed in the first place. The rest of the frame is apparently adequate, as many, many others have done it before you.

I presume they were successful, as I have not seen any posts saying "hey, don't do that, I was killed because my frame flexed too much while in a curve the other day".

.

[Dogma]

I have heard (rather, seen) people talk about leaving those two tubes unbraced resulting in a significant weakening of the frame. My guess is, they tend to spread under load.

[ozman]

theres should be a cross brace about 2 - 3 inches in front of the shock mount joining the 2 top tubes, if there is one there its not a problem removing the rear rails they dont do anything apart from hold pillion and tail

ozman

[JJ]

Chop it up, ride it some, and then please let the rest of us know how it goes.

[wacky941]

Ask the same question here http://www.caferacer.net/ and they can most likely answer for you, they do that kind of thing all the time.

I agree with others, you can cut them off but, you will need to brace it with steel for strength seeing as the shocks are mounted where you want to cut.

Or, you can just chop it like JJ says and take your chances.

[stetracer]

We cut that section off all the time on drag bikes with one piece body's. You just have to add some extra cross bracing and you will be fine.