GL 1500 exhaust collector

[agedbikeman]

Further to my last post on this subject, I got fed up with buying second hand collectors that were as rusty as what I already had, lets face it, they're all old now. BUT I think I've found the answer.
Worried that buying the Black Widow aftermarket version for 200GBP I would need ear plugs, I found the identical one on Amazon for only 96GBP and thought well if it's too noisy I've not wasted too much, so I bit the bullet and bought one.

This is it

And then I thought what if I put Baffles down the tubes, as it's just plain empty pipes

Like this one

Then I thought again, I've got the Black Widow mufflers that have extension tubes between the collector and the mufflers, so I ordered 2 appropriate baffles and fitted them in the said tubes by drilling a hole in the side of the extension tube and screwed them in place so they don't move

Baffle fitted in the extension tube

Well I have to say if it is quiet enough for me it'll be quiet enough for anyone else, I DON'T ride noisy bikes.

I'm no genius, ( well not much of one) I can't believe no one else has done this before me, surley this must be the answer to the collector problem that we're all having or waiting to happen, the whole exhaust is stainless steel and damned quiet in the bargain.

Anyone interested in copying what I've done I'm happy to share more photos with you

Alex

[blupupher]

did you any exhaust batting? That would make them even quieter if not

[agedbikeman]

Sorry don't understand exhaust batting?

[blupupher]

Fiberglass packing for exhaust.

https://www.amazon.com/gp/product/B099N ... UTF8&psc=1

Helps quiet down noisy exhausts

[FM-USA]

Fiberglass matt/batting will go on the outside of the baffle leaving the inside open.
I'd suggest fill the down-side (away from the engine) of the baffle 1/4 its length.
Point is it vary the back pressure and give another different pressure wave to reenter the inner chamber thus canceling a few more sound wave tones.
Through the acceleration you'll hear different WOW's/Rumbles but hopefully not at the RPM's you want to cruise steady at.
With this design you can vary the packing length and density if your cruise tone is uncomfortable.

[ct1500]

I would suggest doing a complete write-up in the DIY subsection.

[agedbikeman]

Thanks for the explanaiton of BATTING, I did not know that as this is the first exhaust in my life I have had to play with, I will experiment with it as you have suggested to hear the difference, even though it sounds very quiet already, also I will do a write up in the DIY section, meanwhile I hope many people read this especially those in need of a new collector, anyone can PM me for more info.

Hope this benefits many riders

Alex

[FM-USA]

I have a design for the 1500 collector replacement... BUT it's too cold in the unheated garage.
It's design is tune-able... I hope. Also the designed installation 'should be' (95% positive) easy enough to not loosen one exhaust header, HUGE PLUS. Won't know all this until the prototype is made.
My design is nothing like what's been made mainly due to the location. Motorcycles always seems to need special designs.

.

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[PowerSlave]

Do you have links for amazon for the parts?

I just had one of the posts rust off my collector and am looking at options for replacing it. I was able to elongate the mounting bolt hole and clamp the muffler on what was left of the post. Hope it lasts until I can get a replacement.

[agedbikeman]

Hi
This is the link to Amazon USA
Hope it helps, you should also find this on Ali Express.
Let me know how you get on


https://www.amazon.com/Motorcycle-Exhau ... 12&sr=8-46

Regards
Alex

[Graham B]

Please write this up as a "How to" so we can find it again when we need it.

[Fatboy46]

THANKS!!! ordered one for 'just in case" !!

[Windydown]

Thanks for this advice, I had purchased the same exhaust set up and had found it too noisey.
I have followed your advice and fitted a similar baffle, but I fitted it the other way around, with the wider part of the baffle in first so it came up against the bend, so no drilling.
Black Widow have an additional baffle that fits at the front end of the muffler, they supplied one when I spoke to them saying thier muffler was too noisey.