GPR Exhaust - poor man's Akro?

[Matt]

Thanks chaps. That's good, every time I fit an exhaust I eye whatever tubes I have around, you know, copperslip, toothpaste, sun dried tomato puree, and can't help but wonder.

Agree farmer! It makes it that much more rewarding when you figure it out and fix it!

Here's a closeup. The fisheye catering concept (I briefly googled) seems apt:

[Matt]

I just got my old SC Project out of the shed to see why exhausts aren't interchangeable. The link pipe aaaalmost fits into the exhaust!

If I were to somehow make it fit (I.e waste a Sunday sanding the inside of the pipe end) is there a reason why it would be a bad idea?

[farmer]

that's what i would do....spend all day sunday sanding, spend all day monday wondering why...
(it's easier to get some form of exhaust flange taper and beat it up the pipe to widen it)

[Matt]

Hah

Yeah, was searching for something like that and so far failed.

I did get the calipers on the GRP link pipe and found it's not precisely describing a fixed radius circle. But maybe that's normal with tolerances etc. It's only about 0.5mm off.

[farmer]

silicone or gun gum or the like would probably sort out 1mm or less play, you're supposed to leave it overnight but "ain't nobody got time for that"
just don't rev the head of her until it gets a chance to set.

[farmer]

also to take up a bit of play a coke tin/biscuit tin will act as a useful spacer as long as you can clamp it.
you can cut it with scissors... not in front of the wife...and bend it nicely to shape.

[Matt]

I getchya.

Well, the problem is the link GPR pipe is slightly too big to fit the SC-Project silencer. I don't fancy doing any permanent change to the link pipe, so think i'm stumped.

[farmer]

well the coke tin idea should still work albeit the wrong way round but as it's temporary i shouldn't worry.
a nice snug fit ,a clamp and that should work, all easily removable. for a short term job like that i probably wouldn't bother with any compound or at least very little if you get a blow by.

[Matt]

Ah you mean like a collar between the two? Hm! But I will insist on using local brewery cans as Coke can go to hell!

[farmer]

other brands are available...
hate getting caught up in the whole pepsi v coca cola war.....

[Matt]

other brands are available...
hate getting caught up in the whole pepsi v coca cola war.....

They can both go to hell

[Phmode]

is there a reason why it would be a bad idea?

Yeah, you'll wake me up in the mornings if you go out on the bike...

[armstrongracer]

Gravel rash me a*se, that fisheye effect is pure bad prep before the coating went on. either spots of grease still left on the surface of the steel or degreaser was not washed off fully. Oval cans are made round then squashed so top & bottom of the oval gets the most distortion which is why the coating popped there.

[Matt]

Well, Italy have said:

these are scratched due to gravel or pebbles. The body of the silencer is full of craters in the middle of the scratch.

I somewhat expected this, given I gave them the exhaust without paying a scientist 500 euros to examine it first. I'm not saying they're being disingenuous, rather a misdiagnosis.

The chap at the reseller is being decent enough and going back to them to discuss but it seems to me like they're going to stick to that story. Reseller's best guess is something mental has landed on it from the road. Like chemicals. So I suppose i'm lucky my leg hasn't disintegrated due to the same.

[raesewell]

I think it may be time to cut your losses here Matt. Put it down to experience and don't buy their products again and tell anybody that will listen how bad they are, also put it all over social media.