Motorcycle and Scooter appreciation

I think the logic is on the lines of the amount of oxygen available is limited by the swept volume of the cylinder(s), and an excess of fuel leads to incomplete combustion and carbon / unburned fuel in the exhaust part of the cycle with soot deposits around the cylinder head and exhaust. Petrol has a calorific value significantly greater than lubricating oil, so reducing the oil increases the proportion of combustible fuel in each cycle, i.e. increases the proportion of fuel that cannot be burned. Because the oil burns less readily than petrol, the unburned portion tends to be mostly oil, giving an impression of too much oil in the mix.

I can believe this applies to older engines where everything goes through the carburettor and oil levels are much higher (the handbook says 20:1 for my 1952 Trojan!), but it might be different for newer designs where oil delivery is separate from petrol?

In any case, you'll often find complete strangers will claim to know more about your machine than you do, especially if you can't get it going and a crowd gathers...

Hmmmmm…

Don’t worry, the Advrider squad have some much harsher critics in their ranks than any gathering crowd.

I could increase the oil again, but at the current ratio I get almost no smoke and certainly no spooge. It’s premixed by the way.

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I turned the fuel/air screw out 1/8 turn, and moved the incredibly rich main jet clip up one notch.

I think the solution is through that screw. You can also try, if you find a way, to give more air from the intake, maybe just temporarily only to test it.

Tiger fails MOT, SV won't start, CBR in pieces.

Why even bother.

NACC machines are closer to being the log than anything else - certainly won't do speed or wheelies, mostly blue smoke and a lot of 'I had one like that but it was different'.

A bit dated in places, but it might be interesting to read the Two Stroke Tuners Handbook by Gordon Jennings - Google should find you a free online copy - apologies if you've seen it before.

That show keeps getting better.

Basically you are saying increase the amount of air right :)

Now you’re just turning the screw!

The plug does look a bit wet. You'll get there with the tuning, I know I'm not going to have a better idea than you what's going on with it. I've never had a 2 stroke with plugs like that though. Plenty of black sticky stuff in the exhaust ports and exhaust but plugs looking a bit browner and drier. Hard to tell if it's a lot of low revs and low speed stuff whether that would make a big difference.

That's some shit sorry bud

The renovation is a Moto Martin which pricked me ears up!!

Well, so far everything about trials is different to regular bikes. It seems like there is some magic going on inside, small demons and trolls and such like.

I am tempted to run the bike for an hour with the air screw turned out some more, to at least 3/4 out instead of the 5/8 it is currently (or maybe it’s closer to 11/16). So long as it’s no more than a full turn, I’m not looking at a different jet.

Not sure a chocolate brown is even possible with the setup, but I also believe the jets in the carb aren’t standard. I think that they are a size larger than spec, which could be contributing to the soot.

At least today the plug’s electrode was dry and black, and there was much less wet area on the periphery. Last week it was, well, you see it on my hand.

Nah, all good. partly my fault to be honest. I've been tinkering a lot recently and I've realised I've partly lost motivation to ride.

Yes, lots of parts in the purchase were not Moto Martin so they are going to be sourcing a lot of bits.

There's a motorcycle youtube channel called Daily Rider that I've watched a few of, reminds me of the review style on the motorcycle show. They have a laugh and love bikes.

https://www.youtube.com/hashtag/irodetoday

Saw this on eBay and it's right up my street.

I can't stop watching it.

And this at the end?

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Great isn't it. If it had a number plate I'd be half tempted.

It's a queen! Well, actually to have it only for the track would be even better.

Cant blame you!

Thanks for the link, the vids are good - and informative too.

The taliban may be a bunch of cunts...but they've got a solid aesthetic

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Front tyre is suddenly untrue after standing stille outside for a couple of months. Annoying.
Weird thing is that the bike stood on the gentre stand yet the tyre runs out sideways about 5 mm.
Will it correct itself with use?

All the rug all the time.

Do you regularly check the run out on your tyres? I would have thought it was within tolerance but how could it change while on the centre stand?

I'll admit I have been bored during the lockdowns but I still never got round to checking the runout on my bike tyres.

Does anyone know at 0:27 what he is adjusting with his left hand?

https://www.youtube.com/watch?v=IvXGWyOqbZY