SOHC.co.uk Forums > CB350/400

Fancy a reverse cone mega!

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K2-K6:
Something like this may be able to be incorporated into your system to neatly adapt it

https://www.ebay.co.uk/itm/Stainless-Steel-Exhaust-Adaptor-Reducer-Joining-Sleeve-Any-Size-Pipe-Swaged-Ends-/320502908018?_trksid=p2385738.m4383.l4275.c10

Conventional to always step "into" each successive section with exhaust flow,  so one outside existing collector to inside of new silencer could be done and almost invisible once fitted, just two external clamps to fit.

ka-ja:
I have a reverse cone mega on my Yoshi, I used one of the exhaust reducers (above) welded into my laser pipe end, looks fine, will try for a photo later when I am fully awake.

taysidedragon:
They do exist. I have a short mega on my 400 fitted over the collector outlet.
The silencer inlet is 49 or 50 mm. I made a shim and used exhaust paste to fill the gap then a clamp over the top. I got the silencer at Stafford Classic Bike Show a few years ago from a stand that sold universal and British exhausts. Try Armours and other Brit exhaust suppliers.

billdn:
bobv7 - apologies the silencer DOES slide over the collector box outlet not inside- you were right- senior moment there! :-[
So been busy with the Vernier this morning and here are the scores on the doors:-

Silencer/exhaust - outside dia. =47mm inside dia. = 45mm
Muffler/collar/gasket- outside dia. 49.2mm , inside dia.= 43.16mm
Collector box - outside dia. 42mm, inside dia.= 39mm

So obviously the gasket will not fit over the silencer , however without the gasket the exhaust will fit albeit with some small gap about 5mm difference overall which I make about 2.5mm around when measuring radius.
 Liking Tayside Dragon's thought, maybe not a bush but perhaps cork gasket wrapped around and then apply exhaust paste? Would cork withstand heat? Making a bush is beyond my skills + no lathe, or exhaust tape as bryanj suggests around collector box end, slide over silencer and fill remaining gaps with exhaust paste.
Thanks for all your thoughts gentlemen!

taysidedragon:
I made the shim from thin steel sheet and wrapped it around the pipe. The exhaust paste and clamp seal it up nicely.

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