Dunstall silencer repair
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baz
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I have in the past drilled the underside of a silencer and screwed in stainless self tapping screw to stop a baffle rattling
I guess I got lucky because for a bodge it worked well
robs ss
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I have done the same as @baz but:
1. did 3 positions at 120 degrees apart and a further 3 about 6-8 inches along.
2. after I ensured the long stainless self-tappers were firmly screwed in I cut the heads off with a dremel, then filed flat and polished the "stumps".
The result, whilst still a bodge, worked well and looked very presentable.
Cheers
1. did 3 positions at 120 degrees apart and a further 3 about 6-8 inches along.
2. after I ensured the long stainless self-tappers were firmly screwed in I cut the heads off with a dremel, then filed flat and polished the "stumps".
The result, whilst still a bodge, worked well and looked very presentable.
Cheers
baz
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I'm trying to remember
But I think I drilled into the baffle tube as well
I don't remember cutting the head off the screw
How close in do the first 3 need to be to hit the baffle?
Who makes a quality replica?
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"Despite today's reputation the actual Dunstall parts made by Paul Dunstall were cheap crap."
Maybe, but his mods/motorcycles did quite well in the day and were highly sought after. Back then I sure wanted (but never acquired) his 2-1 pipe and mufflers. TBF, NO manufacturer makes any product that is expected to last 50+ years!
A few years ago I was interested in a copy of the 2-1 (can't recall the manufacturer) for my current Commando but I decided I liked the center stand too much to remove it PLUS the reduced ground clearance wouldn't work here (Mexico) with numerous, fairly tall speed bumps being ubiquitous in virtually every town.
Maybe, but his mods/motorcycles did quite well in the day and were highly sought after. Back then I sure wanted (but never acquired) his 2-1 pipe and mufflers. TBF, NO manufacturer makes any product that is expected to last 50+ years!
A few years ago I was interested in a copy of the 2-1 (can't recall the manufacturer) for my current Commando but I decided I liked the center stand too much to remove it PLUS the reduced ground clearance wouldn't work here (Mexico) with numerous, fairly tall speed bumps being ubiquitous in virtually every town.
LOL mine are not that bad off!
robs ss
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I remember just aiming for the centre, ensuring I drilled the second hole (baffle) too - then, with a smaller drill measure how far in the baffle was so that I was sure the screw was long enough.
baz
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Honestly can't remember
Probably half way ish
I have an original Dunstall 2-1-2 on my 1970 750, nowadays we might call it an X-pipe system.
Don't know how much longer it will last, the pipes discoloured and started to corrode in their first year, so get an annual coating of black paint, but I'd agree they weren't made very well. When they were first fitted, the bike sounded very different, and needed much bigger mainjets, but I can't say what difference they made to performance, but the bike always seemed to run better with the Dunstall system.
After a 30-year hibernation one of the silencers had rusted through, the other was fine, so I bought some 'Dunstall replica' silencers off ebay and compared them to the original, and they were just a few mm out on dimensions, but needed the inlet opening out to fit over the Dunstall pipes. After 3 year with the replicas they still look great, apart from missing the Dunstall logo, I'm very happy with them. They were £149.99, but I can't find the seller's details
Don't know how much longer it will last, the pipes discoloured and started to corrode in their first year, so get an annual coating of black paint, but I'd agree they weren't made very well. When they were first fitted, the bike sounded very different, and needed much bigger mainjets, but I can't say what difference they made to performance, but the bike always seemed to run better with the Dunstall system.
After a 30-year hibernation one of the silencers had rusted through, the other was fine, so I bought some 'Dunstall replica' silencers off ebay and compared them to the original, and they were just a few mm out on dimensions, but needed the inlet opening out to fit over the Dunstall pipes. After 3 year with the replicas they still look great, apart from missing the Dunstall logo, I'm very happy with them. They were £149.99, but I can't find the seller's details
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