Exhaust mods

Would I need to cut the exhaust in order to fit one? I have the two into one exhaust so won’t need a twin set.

Thanks for the reply!

Could you provide a video of the sound of your exhaust with the mutes?

It’s possible I could get two down pipes and attach straights to those (or mutes). If they aren’t in great condition I could always wrap the down pipes.

While I have you, I also have rust in the tank. Any advice or knowledge of costs to have that fixed?

i can put it on if you wish ian, just let me know.

By chance, I went out on that bike today. Temp was 3 degrees so plan was to go on the rat bikes with heated grips, which  in my case is the 250N but with the rubbish weather I haven't used it for several days & the longer it's left the longer it takes to start. It always does start, just need more churning of the starter & today the battery gave up first so no go The 400 on the other hand starts straight away no matter how long it's been left. The roads were dry so I used the 400N instead & it does sound good - not too loud, just right, I love it . Anyway, assuming your 2 into 1 is a Motad, looking back at pictures of my bikes when they had Motads, the joint between silencer & downpipes isn't far off the same point on both the Motad & the 400N

This is the 400 with it's Motad. The joint between downpipe & silencer on the Motad is between the footpeg & brake pedal footpad



and with the Daytona replicas & exhaust kick-ups from classicbikeshop & pattern downpipes from SIlvers



and the 250NB with pattern SD silencers from classicbikeshop, HiLevel replica collector box & downpipes from Silvers



So it wouldn't be too hard to join the 2 into 1 downpipes the the Daytona, except the end of those downpipes is a figure of 8 shape as the 2 pipes merge together with a matching shape on the ned of the silencer. Might still be possible though with a combination of cutting, tin-bashing and some sort of adapter sleeve. Classicbikeshop do various adapters & sleeves, but it wouldn't be too hard to knock something up - what do you think? As for a 2 into 2, the kick-ups on the 400N save about £50 on the replica collector box, plus no need for heat shields which can be expensive. The Silvers downpipes are about £60 + postage & the classicbikeshop silencers are just over £100 (similar to their replica SD silencers, with free postage over £100)) & the kick-ups £30. One disadvantage with the kick-ups is that they don't kick up quite as much as the collector box, so the silencer prevents the rear wheel axle bolt being withdrawn, but it's dead easy to remove the whole exhaust on one side just by unfastening the 2 nuts at the head & the silencer bracket nut on the rear footpeg

Having really given it thought, I think a twin exhaust is the way to go. Not only is it easier but I also prefer the look. I was disappointed when I learned my bike had the Motad exhaust. I think I’ll source some down pipes and wrap those, and attach them to some aftermarket chrome mufflers. Should look and sound wonderful. I’ll have to get a tight seal on the mufflers though. Besides welding, what can I do to prevent air leaks? I’ve tried exhaust sealant and bathroom sealant in the past. Both degraded quickly, though the bathroom doesn’t lasted a good while.

Silvers stock them for both front and rear ,the fronts are smaller than the rears On my set up I use front gaskets (down pipe to collector box but at the rear I have a metal reducer clamped in place like you would a normal set up with a three inch long inch and a half diameter steel tube slotted in , onto that I've clamped my kick ups and onto that the silencers themselves .The end result looks like this