The outside of a motorbike engine seen up close near the exhaust

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Ian Soady¹ said :-
Oh no I won't. The vacuum arrangement is the work of the devil, with not only a vacuum operated device on the RHS of the bike but a vacuum controlled tap on the left. And a conventional on/off tap under the back of the tank where you can't get at it.

Oh well, turns out I was right to be suspicious of the vacuum arrangement. I put a gallon of fuel in yesterday, started the engine on Prime (started easily and sounds good) and left the tap on Main. When I went into the garage this morning, guess what? a pool of petrol underneath. Obviously the vacuum tap gadget is passing fuel when it shouldn't. Exactly what I feared. So I'll do my mod of replacing it with a simple on/off tap. When I lifted the air filter housing the front carb was full of petrol as well, so the needle valve in that one at least needs a good looking at. All thi because idle riders can't be bothered to turn the petrol off!

I've stripped both "taps" - see below - and will replace the one on the left of the pic with an ordinary on/off tap feeding the one on the right. I've replaced the vacuum arrangement in that with a simple gasket with a smear of wellseal.
Posted Image

16/04/2024 16:04:57 UTC
Ian Soady¹ said :-
The gasket:
Posted Image

16/04/2024 16:05:26 UTC
Ren - The Ed¹ said :-
Vacuum Taps - a solution looking for a problem.

I suppose the theory is - ahem - if the carb's float valve gets stuck open it is possible to either cause a hydraulic lock because the piston is full of fuel or cause a fire because the fuel's spilt all over the bike. So the vacuum tap removes the possibility of "lazy" riders not turning of their fuel taps like dutiful motorcyclists. Mind you all the bikes I've owned up to the CBF125 and CB500X(s) have had regular taps and carbs and I never came across the leaking float valve issue. It's all those occasional riders innit.

16/04/2024 19:42:46 UTC
Ian Soady¹ said :-
Well nobody said it would be easy....

I guessed that the petrol would have got into the cylinders so turned the engine over with the plugs out (by turning the back wheel in gear - I'm not daft enough to use the starter) and was rewarded(?) by a spurt of petrol from each plug hole. But if it's got into the cylinders then it must have got into the oil as well? So dive underneath only to find the sump plug has been cruelly hacked about. I'm starting to realise why the PO wanted shot of it.

Of course daid plug is lurking between frame tubes and convoluted exhaust pipes so is a bugger to get at - no chance of stillsons or mole grips. I've left it alone for the time being while I ponder.

17/04/2024 12:00:27 UTC
nab301 said :-
That's a pain Ian, but inline petrol taps are readily available (dare I say from horticultural suppliers too..) and should sort the vacuum tap problem if fitted after it.
Not sure on the sump plug issue without seeing its location.
Nigel

17/04/2024 13:21:11 UTC
Ian Soady¹ said :-
Yes, I've ordered a simple on/off tap from ebay.

I'll try to post a pic of the plug. It will be easier to get at if I lie the bike on its side but then may lack the strength to pick it up again.....


17/04/2024 13:41:44 UTC
Ian Soady¹ said :-
Giving up for the time being on the Yam. I thought if I could get the offside exhaust off I'd have more fiddle room but of course the allen screws holding it on are rusted solid and rounded off. I expect I'll have to drill them out. What other horrors await....

To partially restore my sanity I made a new clutch cable for the BSA. Very satisfying even though I'd ordered the wrong size inner and had to search my bag of spare cable bits to find the right one. At this rate it will be hitting the road before the Yam, which wasn't the plan.....

17/04/2024 16:14:29 UTC
Ren - The Ed¹ said :-
This comes back to a recent post of mine regarding what I may or may not get as my "second" bike. I keep on looking at old NTVs and the like, because they're a good solid strong machine... unless one of the previous owners of the machine was a mechanical assassin.

I do have one advantage over you in one respect Ian. Being a mechanical assassin myself I'm getting quite good at re-bodging other people's bodges and quite adept at knowing where to look for bodges. It takes one to know one as they say.

Anyhow, urgh your situation sucks. But then I also realise while this might be frustrating for you I suspect you'd be bored if it came to you in perfect condition and merely required an oil change and the bars adjusting slightly. You'd have to ride it then and where's the fun in that?

17/04/2024 20:03:59 UTC
Ren - The Ed¹ said :-
Oh, and I've spent the last 3 evenings fitting a new rear tyre, a new chain and sprocket set and new rear pads. I'm covered in oil and road grime, the house looks like the worst dodgy backstreet mechanic's shop and I've used muscles I didn't know I had. I am pleased to say I still have all my fingers and toes, so far.

17/04/2024 20:07:28 UTC
nab301 said :-
Ren , 3 evenings spent doing one evenings work.... ? You're obviously related to the works foreman!
Nigel

18/04/2024 15:57:32 UTC
Upt'North ¹ said :-
He's obviously far to busy counting his fingers and toes, which isn't easy when you use them for counting.

18/04/2024 16:02:50 UTC
Ren - The Ed¹ said :-
Harsh Upt', harsh, however also funny.

nab301 - Pfffft. Right where to start.
Evening 1 - remove rear wheel, clean rear wheel, get into the usual battle royale with rubber, fit tyre, collapse in a sweaty heap.
Evening 2 - clean the cush drive and sprocket carrier, clean the swingarm, clean the rear brake, balance the wheel/tyre, work out how to use chain tool, break chain tool because you don't know how it works, cut chain with angle grinder, fit new chain, use the now broken chain tool to flare the soft rivet, collapse in a sweaty heap.
Evening 3 - fit new front sprocket, fit new rear sprocket, refit rear wheel, spend an age looking for a sliver of metal from the brake mount, look online to see how much a new one would be, kneel and injure oneself on the sliver of metal while looking for a bolt, cry quietly into a brew, fit brake pads and caliper, torque everything, collapse in a sweaty heap.
This lunchtime - refit sprocket cover.

Now all I need to do is worry about have I tightened everything up. No wait, oh no, have I overtightened anything?

18/04/2024 16:50:51 UTC
Ren - The Ed¹ said :-
This little sliver of metal. About £10. What the flip?!?!
Posted Image

18/04/2024 16:53:53 UTC
Upt'North ¹ said :-
That's a lot of money for a retainer. But of course you'll be paying for delivery from Belgium overnight, whether you want it or not, plus the profit of the Chinese manufacturer, Honda themselves, the dealer etc.
That must be a common part on other models too with Nissin calipers.
The metal is fairly funky too, like a spring stainless if memory serves me right.
But it's only money.
Upt.

19/04/2024 08:31:39 UTC
Ren - The Ed¹ said :-
That'll be the long and the short of it Upt' yes. It's only money, but without it we're screwed.

21/04/2024 08:38:52 UTC
Upt'North ¹ said :-
Got The B MOT'D at Berwick-upon-the-Tweed.
First ride this year, blummin freezin at only 46 of your f's.
I've decided there's only two weather seasons, I officially decree it! We now have Woolerumnal and Summer. Summer is optional. Woolerumnal at this moment has continued unabated since June 30th 2023.
Pffffffftttttt.
Upt.

21/04/2024 09:21:57 UTC
Rev. Mick! said :-
You do have to love cubs.

After a complete winter of neglect, due to the very good weather in Ireland currently, the Cub was wheeled out from the back of my niece’s husband’s shed.
Looks like a barn find but started 2nd kick. Battery not even flat.
The summer is coming.

First thinking a “Tour of Devon”.

21/04/2024 20:28:30 UTC
Ren - The Ed¹ said :-
Tour Of Devon Rev. Mick!? At the pace you went across The Outer Hebrides a Tour Of Devon should take you 2 days I reckon. Throw in a bit of Cornwall.

46f Upt'. I'm gunna have to google that. Ah, just under 8 proper sensible degrees Celsius (or centigrade). 8c is perfectly warm, you just forgot to put a jumper on after being in the nice warm car all winter.

23/04/2024 07:16:26 UTC
Glyn said :-
Both bikes are still tucked up in the garage for me. It's rarely more than 10°C at home but we're currently touring the Monmouthshire and Brecon canal in a 61ft narrow boat. Mrs Glyn is happy so that'll do for now. I have to say that a 61ft boat is a bit of a handful for two (elderly) persons and I can't wait to get home and back to some work on the bikes. A bit off topic I'll agree but my short story does come under the heading of "travels".

25/04/2024 17:20:07 UTC
Rev. Mick! said :-
Not sure what you meant there Ren.
It was unlikely I was doing me D.P.Gumby imatation with me ice cream and knotted hankie on a miserable pissing wet day in the Outer Hebrides. We wanted to whizz up the archipelago and get to the bothy, get fire going and have a single malt while looking out at one of the most amazing west coast views.
We’ve spent a lot of time up there and know what it can be like. Great blast of a ride though despite weather.
The Devon (and probably Kernow) tour might involve climbing gear too. There are a few routes I want to do or repeat as it may be the last time.
Commando Ridge at Bosigran.
Devil’s Slide on Lundy.
Doorpost at Bosigran.
Climbers’ Club Ordinary at the Dewerstone.
Plus I have a number of very good school buddies down there.

Also ideas for big trip this year, initially focusing west, Colombia, Jamaica or T&T. All very interesting and I have not been for years. Imagine rural Jamaica on a 50cc scooter.
However Albania has been suggested, looks very nice, very very cheap (for Europe), there seems to be good bike and scooter hire. So ideas are once more being tossed around.
https://www.madornomad.com/motorcycle-travel-guide-albania/...

25/04/2024 19:03:03 UTC

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