Exhaust Flange Removal |
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Glawster
Senior Member Joined: 14 Sep 2015 Location: Cheltenham Status: Online Points: 896 |
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Posted: 18 Oct 2017 at 13:23 |
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I'm interested in your recommendations for the best tool for removal of the castellated exhaust flanges on the V7 Sport. I imagine it's the same as on loop frame engines. Will a regular adjustable hook / C spanner do the job? Or is there something better?
Thanks, Derek
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1970 Guzzi V7 Ambassador
1955 Guzzi Falcone Sport 2021 BMW R1250R 1998 Cagiva Gran Canyon |
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Amboman
Senior Member Joined: 05 Dec 2015 Location: Maryland, USA Status: Offline Points: 383 |
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If they're not seized into the heads, then a 58-62 mm hook wrench will work fine. If more force is required to loosen them, then something like this is a better choice:
http://www.claussstudios.com/store/p718/Moto_Guzzi_V700_Ambassador_Elderado_Exhaust_Nut_Wrench.html |
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Charlie
'69 Ambassador,'71 Ambassador,'73 Eldorado,'75 Eldorado police,'76 Convert,'77 Morini 3 1/2 Strada,'81 Ducati 500SL Pantah http://www.AntietamClassicCycle.com |
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Glawster
Senior Member Joined: 14 Sep 2015 Location: Cheltenham Status: Online Points: 896 |
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Wow that's a really excellent dedicated tool. I wonder if anyone in UK stocks it? Probably a hook wrench will do the job. Thanks
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1970 Guzzi V7 Ambassador
1955 Guzzi Falcone Sport 2021 BMW R1250R 1998 Cagiva Gran Canyon |
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Brian UK
Moderator Group Joined: 13 May 2014 Location: Surrey Status: Offline Points: 17641 |
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I've always used an adjustable C spanner for such things, ever since I owned Norton twins in the dim and distant past.
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Brian.
Better 5 minutes late in this world than years early in the next. |
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ranton_rambler
Senior Member Joined: 13 Feb 2015 Location: Stafford Status: Offline Points: 1147 |
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Never had cause to disturb mine. The previous owner made them from brass/bronze so I hope they wouldn't be seized. The special tool looks like a laser cut profile, so would be fairly easy to get one made if you measure up your flanges. Many small engineering firms have small CNC lasers nowadays, although much easier if you can someone to create a profile (DXF file usually) in CAD. It used to be possible to download free simple CAD software. I cheated and got some C-spanners designed and made at work for doing rear pre-load adjusters etc.
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cyclobutch
Senior Member Joined: 08 Sep 2015 Location: Essex Branch Status: Offline Points: 750 |
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Yeah I was very disappointed to note when I had mine up on the table at the weekend that they were using this method of exhaust attachment.
I have a Morini Camel which has the same approach. When the rear all came loose I found the main issue there was that the collar had been cross threaded in. Big dia and fine threads all coated with a bit of exhaust carbon is always going to be a liability. I've slotted the early threads on it for now so it cuts and bites a little deeper, but it's a head off job for another day. North Leicester Motorcycles supply the right spanner for that - and will machine out and then weld in a new insert as a fix for those. Not sure who would provision a Loop option in such circumstances. I'll probably buy one of those wrenches once I've checked at home that it will fit mine - thanks.
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Butch
V50 II - 'The Black Pearl' T3 - 'Blue' Eldo Loop - 'Jug' |
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v7john
Senior Member Joined: 14 May 2014 Location: West Wales, UK. Status: Offline Points: 703 |
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I use a C-spanner on mine. Be aware that the original items and some of the replacement ones with an additional locking ring don't have the same arrangement of slots. Mine don't.
There are a couple of problems with this fixing other than getting the threads crossed up. They can seize in the head or they can vibrate loose! If loose the header pipe rattles in the head and the threads get damaged. I used to lock-wire mine to a fin on the head but now use the later type with a locking ring and copper slip on the threads. |
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1972 V7Sport "The Racing Rhino".
1972 V7 700cc "The Fire Bike". 1954? Superalce 1954 BSA M33 (to be sold) Read my blog https://racingrhino.wordpress.com/ |
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Jerry atric
Senior Member Joined: 24 Nov 2014 Location: Wiltshire Status: Offline Points: 3367 |
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My 1937 single has a similar set up and I can say with some certainty that the PO used a big screwdriver and an even bigger hammer.
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GUZZIPETE
Senior Member Joined: 29 Jul 2016 Location: Devon Status: Offline Points: 198 |
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Stein Dinse do nice C Spanner. Works well, plenty of controlled leverage.
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1971 Moto Guzzi V7 Special
1974 Laverda 750 SF2 1979 Laverda 3CL |
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cyclobutch
Senior Member Joined: 08 Sep 2015 Location: Essex Branch Status: Offline Points: 750 |
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Given that I'm now already having to pull the motor on my new to me Loop I've ordered one of these in anticipation. Expensive piece of kit all in - and I bet I get collared for import duties too. Anyway, I'll report back when it turns up and I get to swing it in anger.
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Butch
V50 II - 'The Black Pearl' T3 - 'Blue' Eldo Loop - 'Jug' |
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GUZZIPETE
Senior Member Joined: 29 Jul 2016 Location: Devon Status: Offline Points: 198 |
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A good investment Butch. Just spent £50 on a parts from MG Cycle and got charged £50 for duties - ouch.
But then of course, if I didn't spend the money on the bikes I'd probably only waste it ;-) |
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1971 Moto Guzzi V7 Special
1974 Laverda 750 SF2 1979 Laverda 3CL |
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Mike H
Senior Member Joined: 21 May 2014 Location: East Anglia Status: Offline Points: 8733 |
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We do seem to get hammered buying stuff from thec states.
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"Chicken nuggets don't dance on a Tuesday."
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Mike H
Senior Member Joined: 21 May 2014 Location: East Anglia Status: Offline Points: 8733 |
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What's this for? |
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"Chicken nuggets don't dance on a Tuesday."
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cyclobutch
Senior Member Joined: 08 Sep 2015 Location: Essex Branch Status: Offline Points: 750 |
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Yep - they stuffed me on duties - £3 plus the £8 handling charge. Always a problem when stuff comes UPS. The sq hole is for a 3/8 drive wrench, so I got myself a converter to 1/2 for my kit. It is a really nice fit in the collars as you might hope. And in fact mine were not at all hard to remove. Threads in heads and collars is thankfully all good. I'll reassemble with copper slip, though the possibilities for these winding themselves out is duly noted. I guess there will be some occasional re-tightenings as things settle. To answer another question; I'm in there due to a g/box return spring failure. And have since also found a pretty nasty starter ring gear and a detached friction plate in the clutch. Nigel has the box right now and has advised I also need some dogs welded and reground. I'm a bit busy right now but hope to have everything back ready to reassemble in the first week or two of the new year.
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Butch
V50 II - 'The Black Pearl' T3 - 'Blue' Eldo Loop - 'Jug' |
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theone&onlymin
Senior Member Joined: 14 May 2014 Location: United Kingdom Status: Offline Points: 2072 |
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