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Topics - taysidedragon

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Out & About / Tiger country
« on: June 24, 2022, 01:24:51 PM »
Getting some miles on the Triumph Tiger at last. I found a suitable jungle for a Tiger!

Project Board / Unusual use of 400 four engine
« on: May 20, 2022, 02:07:50 PM »
Here's a combination that I never thought I would see!
In this month's Classic Bike mag, a 400f engine squeezed into a Douglas Dragonfly frame.
It's nicely engineered,  but I can't help think, Why? The owner said he wanted the ease of electric start in a good handling bike. That's what he had with the complete 400f project bike that he bought off DS. 🤪

Humour / Carb problems explained
« on: March 22, 2022, 11:58:19 PM »
Pinched from AWoL Biker Magazine.

Everything about carbs you needed to know..


The basic secret of carb function is that inside each carb are thousands of tiny gnomes; each with a small bucket. As you open the throttle, more of these gnomes are allowed out of their house and into the float bowl, where they fill the buckets and climb up the carb's passages to the intake, where they empty their buckets into the air stream.
But, if you don't ride the bike for a while, bad things can happen.

Tiny bats take up residence in the chambers of the carb, and before long the passages are plugged up with guano. This creates a gnome traffic jam, and so not enough bucketfuls of fuel can get to the engine. If it gets bad enough, the gnomes simply give up and go take a nap. The engine won't run at all at this point.

Sometimes you'll have a single dedicated gnome still on the job, which is why the bike will occasionally fire as the gnome tosses his lone bucket load down the intake.
There has been some research into using tiny dwarves in modern carbs. The advantage is that unlike gnomes, dwarves are miners and can often re-open a clogged passage. Unfortunately, dwarves have a natural fear of earthquakes, as any miner should. In recent tests, the engine vibrations caused the dwarves to evacuate the Harley Davidson test vehicle and make a beeline for the nearest BMW dealership. Sadly, BMW's are fuel injected and so the poor dwarves met an unfortunate end in the rollers of a Bosch fuel pump.

Other carb problems can also occur. If the level of fuel in the float bowl rises too high, it will wipe out the poorer gnome housing in the lower parts of the carb. The more affluent gnomes build their homes in the diaphragm chamber, and so are unaffected. This is why the bike is said to be “running rich”.
If the bowl fuel level drops, then the gnomes have to walk farther to get a bucketful of fuel. This means less fuel gets to the engine. Because the gnomes get quite a workout from this additional distance, this condition is known as “running lean”.
The use of the device known only as the ‘choke' has finally been banned by PETG (People for the Ethical Treatment of Gnomes) and replaced by a new carb circuit that simply allows more gnomes to carry fuel at once when the engine needs to start or warm up. In the interests of decorum, I prefer not to explain how the ‘choke' operated. You would rather not know anyway.

So, that's how a carburetor works. You may wish to join us here next week for basics of electricity, or “How your bike creates cold fusion inside the stator” and why the government doesn't want you to know about it.

Member 4 Sales / 400 four wheels, new rims and spokes
« on: March 01, 2022, 05:30:37 PM »
Posting for a friend.
New front and rear wheel rims, one DID, one Araya, new spokes and pair of old wheels. Can cut the hubs out of the wheels before posting. Located in Dundee. £275 + £25 postage

Message me for contact details if interested.

Modified for correction.

Other Bikes / Triumph T100ss
« on: December 27, 2021, 01:52:10 PM »
An early Christmas present to myself was this 1965 Triumph Tiger T100ss. It's the wrong colour for 65 and has non standard bits on it. Some other parts needed so needs a little bit of work before riding.
Bought it from a mate who's kept it in his living room for the last 5 years. 👍😁

Out & About / Broughty Castle
« on: November 10, 2021, 05:09:24 PM »
Broughty Castle, Dundee. Beautiful day today, dry roads and managed to avoid mud and wet leaves.

Misc / Open / Hailwood Honda
« on: November 09, 2021, 11:13:19 AM »
Pinched this off a Faceache page. Apologies if posted before.

Member 4 Sales / Mystery Cam Cover and 400f Barrels
« on: October 23, 2021, 05:33:57 PM »
In my mate's stash of 400 Four parts was this Cam Cover. Definitely not 400, anybody got a clue which engine it's from? It's not perfect condition but rocker faces and cam bearing faces look good.

400f barrels have 2 chipped fins and scores near top of cylinder 1 and 4. Pistons are standard.

Just having a clearout so open to offers.

CB350/400 / Kickstart knuckle repair
« on: September 11, 2021, 02:33:39 PM »
My 400f kickstart knuckle was cracked at the usual design weakspot. Since they are almost impossible to find and I'm not too concerned about originality I asked my expert welder relative if he could weld a plate onto the weak part for reinforcement.  He did a great job tig welding it on. I then ground and filed the edges off and painted the bare steel with silver paint for protection.  It's working fine on the bike and if it holds up I'll get the knuckle rechromed.  It's much stronger than original so I don't expect any problems.
Not good for originality but can save cracked knuckles from the bin. 👍

CB350/400 / Starter motor cable
« on: August 21, 2021, 12:53:28 AM »
Quick question; I went to connect the power cable to the starter motor terminal and I can't remember the sequence for the washers.

I've got an insulating washer on the base, next to the casing. Then the cable fixing, then a flat metal washer, a small lock washer, then the fixing nut on top.

Is that right? Should have noted the order when I took them off, but didn't for some reason. 🙃

CB350/400 / Carburettor throttle return spring
« on: May 18, 2021, 10:30:52 AM »
I find the throttle quite heavy on longer rides. (Arthritis in my hand doesn't help 😣)

The return spring seems a lot stronger than it needs to be, has anybody tried a slightly lighter spring to lighten the throttle feel. Obviously it still needs to be strong enough to safely close the throttle.

Other Bikes / Z1 question
« on: February 11, 2021, 04:34:38 PM »
A quick question for the Z1 experts.
What was the engine finish for a 1972 Z1? I've seen photos of all aluminium engines and photos of black engines with bare fin edges. Were there different finishes for different colour schemes or for different  markets?

Misc / Open / Easy guide for Metric bolts.
« on: January 24, 2021, 01:10:24 PM »
This is an easy guide to measuring bolts and fasteners on bikes with metric fittings.
It should help those not familiar with the metric system to order the right parts for their bike.
Old Brit bikes and Harleys use Imperial thread types so not covered here.

I'm not connected to Probolt but this is a good, clear guide. Some guides or tables are too complex for our needs.

Humour / Socket problems
« on: December 27, 2020, 01:18:11 PM »
The answer to your 10mm socket problems. 😄

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Misc / Open / A little bit of knowledge........
« on: October 15, 2020, 11:01:06 AM »
My dad told me a funny story from many moons ago about when a little bit of knowledge can be a dangerous thing.

A professor at the university he worked at rode into work one Monday morning on his old Rudge m/c. It was smoking and rattling like mad, sounding like it was on it's last legs. When asked what the problem was, he said he couldn't understand it because he'd just fitted new valves and guides on the weekend.
On further investigation it turned out that he'd fitted the valve guides but the valves were a bit tight so instead of reaming the guides he'd put valve grinding paste on the valve stems and ground them in until they were a sliding fit. He thought he could clean all the grinding paste off, but didn't realise that the phosphor bronze guides would absorb some paste and keep on grinding! By Monday they were already knackered. 😣

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