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Lozenge Silencer

Posted: Thu Jun 04, 2020 9:40 pm
by Keefe
Hi, I picked up a Lozenge Silencer for the B25 that I will eventually get round to putting together. It is going to need a patch welded onto the back of it, where it has rusted. I am hoping to weld it myself with assistance of friends.

My question is, what gauge steel should use to repair it.

Thanks

Re: Lozenge Silencer

Posted: Sun Jun 07, 2020 8:14 am
by BasilF
Can't give an exact answer but my new silencer is made of 1.5mm steel and it was only slightly heavier than the original one so 1.2 or 1.5mm ought to be fine for your patch and 1.5mm will be easier to weld.

Re: Lozenge Silencer

Posted: Wed Aug 26, 2020 6:34 pm
by BasilF
Had a go at making a new lozenge silencer as a spare for my B50/
IMG_20200716_114704.jpg
Made a wooden buck from the measurements of an original silencer. To get a more curved shape, rather than fold a channel and then make the ends into a lozenge I made a top and then sides and welded them all together. Shell is 1mm mild steel.
IMG_20200716_114713.jpg
IMG_20200817_143612.jpg
Baffles and internals were very similar to original.
IMG_20200818_094656.jpg
IMG_20200821_183924.jpg
Backs and mounting points were welded on. It was made to fit my frame and a new eBay exhaust pipe (which needed bending and cutting to fit) but I don't expect it would fit any other bike which is why I made a complete replacement exhaust.
IMG_20200826_173358.jpg
Heat shield was made in 1mm aluminium and varnished. I might try to make one in 0.7mm stainless some time.
IMG_20200826_173411.jpg
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Complete system will go on the shelf waiting for current one to rust through.

Re: Lozenge Silencer

Posted: Wed Aug 26, 2020 9:48 pm
by beat
:thumb :thumb :thumb

Re: Lozenge Silencer

Posted: Thu Aug 27, 2020 9:18 am
by Keefe
Wow, I could only dream about making something like that. Well done.

Re: Lozenge Silencer

Posted: Thu Aug 27, 2020 2:08 pm
by JerryT
Great work BasilF

Re: Lozenge Silencer

Posted: Thu Aug 27, 2020 3:19 pm
by Jeff K
Great work!
Jeff