Mech

If it starts to go ok for a second or so at wide throttle, then falters, it sounds like a fuel supply problem. If it falters as soon as you open the throttle wide, and recovers quickly when you back off, it sounds like jets, air or fuel jets. You can test the pump and in tank filters by testing it as I suggested. Here's another test though that might show us something.. Take the fuel pipe off the carb and lay it in a bottle on it's side. Pull the vacuum pipe off the manifold and suck on it two or three hard sucks, then let the vacuum off suddenly. It should shoot out a good full flow squirt of fuel. Then connect the vacuum hose to the manifold and start the engine and let it idle, it should flow petrol still at a good flow, near full diameter but not so fast as the first test. Then blip the throttle wide open while watching the flow of fuel. If it drops right off, it's because of low vacuum, which will be dropping right off when the engine's under load and the throttle's open. So check you've got good fuel flow, and vacuum, and then vacuum under load. You could load the engine to test for weak vacuum by putting it in gear, brakes on, sitting on it of course, and then open the throttle till it's labouring on the centrifugal clutch. The hole in that pipe poking out of the manifold needs to be a good size. Check it's the same size as the old manifold's one. It should be more than about three mills. On later models there are different vacuum ports for different purposes and if you use the small port(about 1.5mill), the pump struggles, use the big port(about four mills), and it's all good. The vacuum hose going to the fuel pump needs to be thick walled, fuel hose is best. If you use a thin walled vacuum hose, that's hose sold as vacuum hose, it gives/collapses too much with the pulsing vacuum. The pump has to get a good pulsating vacuum to it. A partially collapsing hose gives a steady non-pulsating vacuum.

"mass mask use"..

Mask wearing served Taiwan very well. "Approaches to preventing or mitigating the impact of the COVID-19 pandemic have varied markedly between nations. We examined the approach up to August 2020 taken by two jurisdictions which had successfully eliminated COVID-19 by this time: Taiwan and New Zealand. Taiwan reported a lower COVID-19 incidence rate (20.7 cases per million) compared with NZ (278.0 per million). Extensive public health infrastructure established in Taiwan pre-COVID-19 enabled a fast coordinated response, particularly in the domains of early screening, effective methods for isolation/quarantine, digital technologies for identifying potential cases and mass mask use. This timely and vigorous response allowed Taiwan to avoid the national lockdown used by New Zealand. Many of Taiwan's pandemic control components could potentially be adopted by other jurisdictions.".

The dunking in water might have caused a crack or track down the sparkplug cap.. It might look like it's sparking good when the plugs out, but be shorting when there's compression on the plug. If it's possible take the cap off the end of the lead. Even taking the waterproofing rubber boot off might make a difference or allow you to hear the spark jumping down the porcelain. It could have done the same thing to the ignition coil. Once there's compression on the plug the spark has a harder time jumping, and can short somewhere else.

Well, I'd want the headgasket wet, and the waterpump, and all the hose connections staying wet if I could.. Drying out antifreeze is corrosive. Gaskets dry out and then the new antifreeze has a low surface tension and it creeps into the gasket and causes corrosion of the head and cyl surface.. It's best to keep things wet once they have been in contact with antifreeze. That's why I suggested the hose joints, they trap a bit of antifreeze even though you flushed the system. Even the aluminium castings will try to corrode. The manual I see also stipulates ethylene-glycol, which doesn't penetrate gaskets as readily as some of the later chemicals. If your head gasket is "paper", rather than a steel gasket, then I'd definitely use ethylene-glycol. I'd us it anyway.

Good work man.. Spotting the radiator was a good job. That oil.. The mobil 424 I looked up is no common oil, it's anti-everything.. https://tinyurl.com/yk6n63w4 The Lucas oil doesn't claim some of the features the mobil has. I'd use the mobil. The new agricultural oils are bloody tricky. I've seen problems from using very similar oils, designed for the similar applications, but not good for the particular make and model of tractor. And I'd fill it up with water while I waited if I could. The aluminum under hose clamps might start to corrode and it will keep on going once it starts.. Best not to let them sit empty..

Yup it is a good site.. Just watch out for the bun fights.. haha. Hope you've got the lad on the job too.. Assuming here he's a young fellah.. Good project's bikes.. and riding together.

Checked fuel's getting into the carb ? Loosen the drain bung and see if fuel comes out, after it's empty crank it over and check that more comes out. Tests the flow and pump. Take the spark plug lead's fittings off(if you can) in case they are shorting.. Use a tiny split pin jambed up the wire to the plug. Loosen the exhaust at the head perhaps. Blocked exhaust stops the suck too. It's got a new plug huh ? And fresh fuel ?

Oh yeah.. It might be worth checking the fuel pump delivery is right before pulling the carby off.. It's simpler to do. And bad fuel supply could give your problem. Pull the fuel delivery hose off the carby and lay it into a bottle on it's side. Start the bike and let it idle and the fuel should be squirting out full diameter of the pipe... Er, squirting out of the pipe full diameter of the pipe. A trickle is a bad pump and may or may not get it up big hills, or when the tank gets low. And that "boot" you are mentioning, between the carb and head, that's called a manifold... If you're mentioning it in the future.

Are you absolutely sure the spark plug's good.. Tried it in another bike, put a good bike's plug in there, got a new plug ? Only full throttle, or somewhere between 1/4 and 3/4 throttle(or a bit more) doing it ?

I like to reason Randy, not argue. I'd love to engage with you on your level, but I'd need so many bourbons, and so many joints to do that, that it wouldn't be good for me. Nearly eight thousand views of this thread now, and I'd have to suspect a lot of them are Americans looking in, and none of them have agreed with you or backed yo up about a single thing you've said. I'd have to suspect that most of them are squirming in their seats reading your parochial money is God and might is right bollocks. I'll leave you to it to save them any further embarrassment.

Lol Randy. Very few of your "arguments", warrant a reply. Arguments are just arguments. Ridiculous, out of context, invalid, factually wrong "arguments" are not even worth correcting. So I don't.

All my suspicions about the people vehemently opposed to the vaccine, that I mentioned when I first came into this thread, have been confirmed and demonstrated. It's just what I've observed over here too.

"Cops kill by mistake all the time. Why? Because it increases their safety. ". Killing by mistake makes no one safer. Whether it's a drone attack on an innocent family, or a "black"(great categorisation that), out for a jog, it's an assault on freedom and security. None of your "reasoning", is justifiable Randy.. it's just defending the indefensible. Slander ? And sarcasm is the lowest form of wit they say..

"sound and mirrors".. You got that right.. Too much echo, and it all reflects badly.

Cheers for that. Well done.

I hope you aren't off looking for the answer to the question on the internet Randy.. That would be too sad. I did tell you we don't have to conform to conventions..(paraphrasing). We're as free and as secure as we think we are.. Freedom and security are both states of mind. Fear is the thing that constrains us. Tell me what you think.. What your really know through experience.

Ha... Well which are you Randy, free or secure ?

Things can be exclusive or mutually exclusive or mutually dependent or complementary. But not everything has to be any of those. Not all choices are dilemmas. Opinions are a freedom we all have. They don't have to be based on facts. They don't have to comply with logic. These things are true of our choice to get a vaccination or not, or to bear arms. Being too righteous about either, is a folly. Very little in life is clear cut. You should think carefully if you are going to commit to whether freedom and security are mutually exclusive or not... We should all think carefully about our choice to get vaccinated or not.

More lapses in reasoning there Randy.. We don't have to choose one or the other, and none of those quotes say we do. We can have both. If, as you have been contending, security depends on the right to bear arms, then freedom and security, are compatible, and even complementary. If however we can not have freedom and security together(as you are now claiming), then your right to bear arms would preclude security, and vice versa. So which(since you think we have to choose), is it.. Mutually exclusive or not ?

Lol.. So I should add sexist to the list.. "Yes they are".. You should think a little deeper on that one.

So that means America shouldn't be allowed nuclear weapons.. I don't consider women in power as a problem. I don't think that testosterone allows any better tolerance of risk. Tolerance to risk isn't gender specific. Testosterone is known to engender risk taking though, and a lot of aggression. And liberty and security aren't mutually exclusive.. They go hand in hand. Deprive a person of either and the other becomes a moot point. All of which tends to suggest that all nations should have the right to possess nuclear weapons if they so wish, to ensure their liberty and freedom. There would not have been a "Korean war", or "Vietnam war", or "Iraq war", or Afghanistan war", if they had had nuclear weapons as Russia and China does. If having guns makes people safer as you maintain, if that is the only solution, then so does the possession of other weapons..

It's just an opinion I'm asking for, it doesn't have to be justified with facts, though those might be interesting.

Yeah reality is what it is, whether we know we are wrong or not. The hundred or so protestors camped on parliament's lawn last night, despite that being prohibited. At least they haven't stormed the building yet. Just another thing out of control, rampaging through the country. I guess that's the trouble with letting a mere woman run the place. Have you decided whether you think all countries should have nuclear weapons yet ?

Do you know what "spirit" is Randy ? It's influence. The influence we all exude that influences others, and the influence we all are susceptible to falling under. It's important to recognise spirit, in ourselves, and the influences we get bombarded with every day. If we don't recognise those harmful influences we might get exposed to, we are vulnerable to them. If we don't know our own spirit and take steps to ensure it is a good one, we do inadvertent harm. What do you reckon your influence is ? Have you ever considered how other people might see your spirit, your influence. Do you reckon it would be a positive one ?