Bucket update

**Sully60** · 18th November 2007, 22:10

Originally Posted by Skunk

You mean you couldn't tell if the bike or you was vibrating.

Aye?

Speak up I can't hear you.

**Ivan** · 19th November 2007, 17:07

Haha is it that intense,

Yeah man I cant find the size specs or any formula for working out muffler did you have one or just randomised it?

**Skunk** · 19th November 2007, 20:24

Originally Posted by Ivan

I cant find the size specs or any formula for working out muffler did you have one or just randomised it?

Yeah, we just do stuff without knowing what we're doing; same as you.

**Sully60** · 19th November 2007, 20:50

Originally Posted by Ivan

Yeah man I cant find the size specs or any formula for working out muffler did you have one or just randomised it?

It's actually a new form of customisation it's called randomisation.

It's where we take totally random things made of metal and ram dem on.!

Originally Posted by skunk

Yeah, we just do stuff without knowing what we're doing; same as you.

BWAAA HAAAA HAAAA HAAAA

Could you hear that from your place Skunk?

**gav** · 19th November 2007, 20:51

Classic! Arent MotoGP bikes around 130db?

**gav** · 19th November 2007, 21:04

Well, while Ivan is flicking through his text books, how much to make up something like this?

Header pipe 30mm ID, 660mm long
first cone 30mmID, 330mm long to 75mm ID
second cone 75mm ID, 70mm long to 60mm ID
Cheers

**Sully60** · 19th November 2007, 21:19

To be honest Gav if yo have to aks den yo can't afford.
Nah just kidding.
I've probably spent about 8 hrs solid to make the two above so far(excluding the maths so far done by others but i'm working on that). I'm going to redo one of the transitions to smooth it out and weld on the back mounts, spring hooks and thats it.
Materials (for two) about $50. I have access to a sheet metal shop cos of my job to roll the cones and the dude just hides the costs. That takes a bit of time but I haven't actually watched him so I couldn't say for sure. Getting the headers bent is the trick. Because we use imperial sized tube in NZ you'll need to use 1 1/4 inch OD with the .9mm wall. We used 1mm. I haven't been able to get these done yet but I've welded some old headers so at least I can use them and I have a pattern for the bigger tubing.
Is this for a single Gav? If so you could probably build something for about $100.
Thats a long header and short cone compared to mine your reverse cone is also a lot longer, mmm me thinks maybe a few less revs than me???

**gav** · 19th November 2007, 21:42

FXR150

It's the spec of the pipe Kickaha runs on his GN140. Thought it'd be a reasonable starting point.

**Sully60** · 19th November 2007, 21:58

Originally Posted by gav

FXR150

It's the spec of the pipe Kickaha runs on his GN140. Thought it'd be a reasonable starting point.

I was right about the revs. Do you know what sort of revs the GN pulls? Mine revs to about 11300 and did make usable power from 6, might be a bit different know though.

I know those FXr's rev fairly high so i reckon from the little I do know you might need to make the header a bit shorter and the first cone maybe a little longer.
I take it Kick has done some noise supression with the end of his system?
You'd probably have to do that if you race at Ruapuna wouldn't you 95dB?

I might have to do that with mine but let me race it just once!

BTW when you next see Kickaha, pass on that I reckon thats a Phat GN Racer, wicked!