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Convert fettling

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Hyline View Drop Down
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    Posted: 13 Nov 2017 at 19:06
I bought a Convert a couple of months ago (my first MG), & the bike seems to run well but has the normal age related cosmetic issues, which I am starting to try to address. It will certainly not be a restoration as I do not have the knowledge or experience to undertake this. I will no doubt be seeking advice on various issues as they inevitably crop up.

The first couple of things I could do with advice on are;
a) I removed the fuel tank and noticed that the electrovalve has no mesh fuel filter - I believe it should have one the same as there RH tap. Presumably this means I will have to replace it with a standard tap. Are there any issues with doing this?
As an aside, what was the point of the electrovalve? Because of the "electro" bit in the name, I expected to see some electrical connections but there are none.
b) The fuel tank has some rust inside, not too bad, but presumably POR15 is the way to go?
c)I have read that the air filter is somewhat difficult to replace, and having removed the tank I can understand why. I had a brief look at it, and I don't think my airbox is connected up properly, so I am wondering if K&N type filters would be advisable, although I haven't a clue about jetting etc to carbs.

I removed the battery tray for re-painting and noticed that the front two bolts securing it to the clutch housing have stripped their threads - I'm thinking this is not too much of an issue as there are four other bolts holding the tray in place, but is something to deal with if I ever pluck up the courage to undertake a full restoration.

Thanks for any advice,
Mike

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Mike H View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mike H Quote  Post ReplyReply Direct Link To This Post Posted: 13 Nov 2017 at 19:46
If the electrovalve has no wires then it don't work. Big smile Yes replace it with a manual tap.

I tried one for a while (2nd hand), would tend to get stuck closed if left for a while. Two manual taps will give you a more useful reserve quantity.

I used the big oval K&N filters with some success, BUT because the air filter box is replaced and it includes the crankcase breather gubbins you need to install the 850 Le Mans type crankcase breather collector box, and longer rocker box hoses. The rocker box covers have to be swapped around so the hose banjo joints are at the front.


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Post Options Post Options   Thanks (0) Thanks(0)   Quote Hyline Quote  Post ReplyReply Direct Link To This Post Posted: 13 Nov 2017 at 20:01
Thanks for your comments.
Just had another look at my LH fuel tap, and it looks like the top (rectangular) portion of the electrovalve as illustrated in the Haynes manual, but without the solenoid on the bottom.
I assume it is a replacement for the electrovalve that a former owner installed, but it looks nothing like the RH fuel tap, and I have no idea what type of tap it is. As it had no mesh filter on it, presumably it has been supplying un-filtered fuel to the carbs ever since.

In view of what you say about the K&N's, I think I will try and persevere with the standard air filter.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jpc Quote  Post ReplyReply Direct Link To This Post Posted: 13 Nov 2017 at 21:29
Hi Mike

I fully agree with Mike H about the manual fuel taps, they give a very useful two-stage reserve.
I've had traces of rust in my T3 tank since day one (in1990) but it never migrated to the carbs, seems
to have stabilized. I would be very careful which sealant to mess with, as the rising tenor of ethanol in
pump fuel might turn an incompatible sealant into a worse nightmare than a few rust flakes.
You also need to check the strainer in each carb banjo.

The air filter/breather box on the T3/Convert does a great job if it's properly installed, and the filter is not THAT difficult to access. You can unclip and remove the grille across the inlet, and then squeeze the filter housing backwards between the cylinders. The filter itself is good for a couple of years at least, in my experience. The rubber thingy if perished, is available new.

The battery tray is a bit more than just that in my (humble) opinion, it has a substantial role in frame rigidity, and it's not a big job to fit a pair of helicoils in there !

Congratulations on your first MG, give a while and it'll grow on you !

jp




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Hyline View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Hyline Quote  Post ReplyReply Direct Link To This Post Posted: 13 Nov 2017 at 21:42
Thanks for your reply.
I have found out that my LH fuel tap is a "sugar cube" tap as fitted to the Eldorado, so someone must have replaced the electrovalve a considerable time ago. I will replace it with a tap of the same type as fitted to the RH side.
I'll have another look at the airfilter to see if I can remove it Ok.
Regarding the rust spots in the tank, bearing in mind that one of the fuel taps had no mesh screen on it and the carbs have not become clogged (so far), I'm hoping that further inspection will show that its not too bad and no need for coating.
Can helicoils be fitted in the front 2 holes of the battery tray without removing the clutch housing from the bike? As you can tell, this is outside of my comfort zone, and probably not something I would want to attempt myself, but I had not realised the tray was important to the structural rigidity of the frame.
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Post Options Post Options   Thanks (1) Thanks(1)   Quote theone&onlymin Quote  Post ReplyReply Direct Link To This Post Posted: 13 Nov 2017 at 22:22
Sometimes a slightly longer bolt will pick up the lower threads. BUT and I say BUT be CAREFUL as you don't want to punch through to the gearbox. Check the depth of the hole.
Cheers
Min
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Post Options Post Options   Thanks (1) Thanks(1)   Quote jpc Quote  Post ReplyReply Direct Link To This Post Posted: 14 Nov 2017 at 07:26
If you've never installed a helicoil before, your gearbox casting is perhaps not the best place for a first
try, although it really is a simple job, and useful to master.
The first step is to bore out the existing (remains of the) thread whist remaining absolutely parallel to it.
This is just possible for the two foremost bolts, after removing the airbox and fuel tank.
Here's a nice tutorial about inserts: https://youtu.be/-YcETGrGScA

If you consider how the engine is held in the frame, two through bolts, one at the bottom of the timing
case and one at the bottom of the gearbox, you'll see that the battery tray at the top of the box must 
contribute to the torsional rigidity precisely where torsion happens, i.e. where the output shaft exits the box.


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Post Options Post Options   Thanks (1) Thanks(1)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 14 Nov 2017 at 09:28
Most difficult part of fitting a helicoil is keeping the hole "square", as in exactly perpendicular to the face.
Brian.

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Post Options Post Options   Thanks (1) Thanks(1)   Quote Mike H Quote  Post ReplyReply Direct Link To This Post Posted: 14 Nov 2017 at 17:34
re "I would be very careful which sealant to mess with"

I've usually found an annual (if that often) removal of filters and a clean-up was all that's needed, and only a bit of rust.

I'd get two new taps and be done with. Big smile


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Post Options Post Options   Thanks (1) Thanks(1)   Quote Ken-Guzzibear Quote  Post ReplyReply Direct Link To This Post Posted: 14 Nov 2017 at 18:08
As has been said clean fuel tank ....fit fuel tap as per other side the electrovalves were a pain, leave air filter until it needs changing I have a V1000 it does have K&N filters and the le mans type breather box but it is a tight fit, Helicoil kits come with all you need to do the job, easy to do take out battery remove battery box you will have access to the holes top tip measure the hole depth then apply tape around drill in the kit that way you will not go too deep the kit has the drill bit, tap and heli coils and the tool to insert, I use some Loctite .... the battery tray not only ads rigidity but the battery earth bolts to the gearbox and battery tray ..... The oem flat slide carbs are now well beyond sell by date upgrade using the round carbs with triangular pump on there is a noticeable difference in the "go" department "phf" I think they are current and parts are available .... if you use K&N filters the usual upjet is 10% Euro carbs are very helpful in this regard, jet changes are real easy and jets fairly cheap ...hope this helps ....My V1000 was built as a convert BUT well before I got it the slush box was replaced by a 5 speed gearbox ....it is a 76 bike with 265,000 miles up
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Hyline Quote  Post ReplyReply Direct Link To This Post Posted: 24 Nov 2017 at 10:54
Thanks for that suggestion, it worked on one of the holes, the other I managed to clean up with a tap.
Is there a secret to getting the airbox on and off? I found it an absolute nightmare! I don't know if the rubber has gone hard with age, but it took me ages to get the thing back in place correctly. And who thought up that method of holding the air filter frame in place at the front end with a "little screw" that you somehow have to thread in by trial & error!
The joys of Guzzi ownership I suppose.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Barry Quote  Post ReplyReply Direct Link To This Post Posted: 24 Nov 2017 at 11:53
Originally posted by Hyline Hyline wrote:

Is there a secret to getting the airbox on and off?



The secret, for many big block owners, is simply: "off"  (o;
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jpc Quote  Post ReplyReply Direct Link To This Post Posted: 24 Nov 2017 at 13:30
The rings of Saturn are in fact largely composed of discarded big block airbox components    : )
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Barry Quote  Post ReplyReply Direct Link To This Post Posted: 24 Nov 2017 at 13:44
Originally posted by jpc jpc wrote:

The rings of Saturn are in fact largely composed of discarded big block airbox components    : )


*chuckle*  At least this discarded plastic isn't filling up the North Pacific Gyre, because - as we all know well - Guzzi owners don't throw anything away, but pop it on the shelf for "in case".
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Post Options Post Options   Thanks (0) Thanks(0)   Quote red leader one Quote  Post ReplyReply Direct Link To This Post Posted: 24 Nov 2017 at 13:56
And then forget which shelf they put it on.
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