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Messages - mousejunks

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1
Downtown 300 / Re: Kymco downtown 300i headlight
« on: February 01, 2024, 12:52:14 AM »
I get my new genuine parts from https://www.bike-parts-kymco.uk/kymco-motorcycle. The deliver from the Netherlands which is 2-3 weeks.

You might also have luck locally on eBay or Gumtree or Facebook marketplace, there could be a wrecking Downtown somewhere, just ask the sellers. I've been lucky a few times for used parts and it saved me hundreds.

2
Have you tried a ceramic coating, like Turtlewax? I did this to my car and the water just beads right off.

https://www.turtlewax.com/products/hybrid-solutions-ceramic-wax-spray-coating-16-fl-oz

Dean

1st is making sure the plastic visor is extremely clean, water will bead off even without any coatings because of the cleanliness. Tiny microscopic scratches from dirt or sunlight breakdown will hold water, so get a new visor if necessary.

2nd is to use a ceramic coat to repel water as suggested above. Ceramic will last longer than wax alone and you can apply many layers to increase the water-repelling effect.

Products such as Turtle Wax Hybrid Solutions Ceramic etc work well.

3
Downtown 300 / Re: DT 300 Battery warning light, bad rectifier?
« on: December 25, 2023, 03:00:23 PM »
Hola amigos!

Just wanted to post an update on my issue. Good news; it seems to be resolved!, I have been using the generic 20 amp rectifier and battery is charging without issues, so that's good!

Bad news; new problem appeared and I'm not sure what it is. When I was putting everything back together I plugged my underseat led light and it didn't worked, the cables were really hot and I unplugged it, I think the light was shorted.

Just after that, the met-in red light from the dashboard stopped working and the check engine light.. is not on, it's more like slightly illuminated.. it gets a bit more stronger when accelerating, it doesn't turn on completely, it is just a very dim yellow light only noticeable during nighttime, but I think something is not working ok there.. also I noticed that my blinkers seem to varies their speed with the engine idle, they get faster when I accelerate.

I think I might have introduced some kind of electrical problem, but hey, the battery is charging perfectly!!

Thanks for your help guys!!

I think the underseat light is shorted, maybe a pinched wire during installation.

Hard to say but the first step is to measure the voltage output of the regulator. Use a multimeter to measure the voltage at the battery at idle and acceleration, should not be more than 14.5V.

Voltages too high or low can cause weird issues.

4
General Discussion / Re: Cruze Scooters Sport 50 made by Kymco Taiwan
« on: December 21, 2023, 05:44:08 AM »
30 psi sounds about right. 40 is too high. What brand are the tyres, this has a huge effect on what pressures to run and handling.

5
Roadcraft / Re: there was no part of me not wet
« on: December 19, 2023, 06:38:23 AM »
Nice Xmas pics.

Do you have a waterproof jacket? Preferably 20,000mm rating or higher as they do a marvellous job in the rain without the 'damp' feeling or wind-flapping of PVC.

Something like Dainese D-Dry works well.

6
General Discussion / Re: The end of gas-powered motorcycles?
« on: December 15, 2023, 01:34:41 PM »
In Australia there are no plans for banning ICE motorcycles. We just wait to follow the rest of the world in trends and standards - especially US and Europe.

EV vehicles in some states already have their odometer read so are taxed $/km. Can see the gov doing the same for bikes in the future. No more subsidies.

7
General Discussion / Re: The end of gas-powered motorcycles?
« on: December 08, 2023, 02:51:00 AM »
 
California promotes a lot of this green agenda crap, yet this past summer, they couldn't even supply enough electricity for households, thus they told people to charge their electric cars every other day. These are the problems with all EV vehicles:

1) There is very little infrastructure to support a total conversion to charging cars. The batteries take a long time to charge.
2) There are not enough rare earth metals to make batteries to replace every single car, truck, motorcycle, train, boat, etc...
3) The current electrical grid cannot supply enough energy to charge all of these vehicles, thus carbon based fuels are needed to account for the energy deficit. Wind and Solar are limited because the Sun does not always shine, nor does the wind always blow(Unless you are a politician in Washington DC(possible source of unlimited wind energy))...lol
4) You still need to make plastics(which require petroleum products) for exterior and interior parts. You need forges to form the metal frames, which use tremendous amounts of energy, etc...
5) The Battery metals are hazardous to mine(think poor children, men, and women being exposed to Lithium poisoning). They are also hazardous to get rid of once they are depleted. So all the green hippies think they are saving the earth buy saving gas use, yet the rare metal pollution from spent batteries have a far more deleterious effect.
6) This green agenda is politically motivated, thus they are forcing an energy solution which is not feasible at this time. People's energy costs are going up and causing a domino effect on cost of goods and thus reduced spending in the economy.

This being said, hybrid engines are a great way to incorporate using less gas and some EV to reduce emissions. The batteries are smaller, but energy is recaptured through driving and breaking.

I'm not in the BEV crowd yet due to sheer cost. Very difficult at the moment to buy affordable electric bikes with comparable range, weight and speed to ICE bikes. The Harley Davidson Livewire for example is 50,000 AUD and comparable to a $12K 650cc cruiser/naked. The BMW CE 04 scooter is 22,000 AUD and comparable to a $9K 350cc maxi scooter, but with only 120km range.

However, there are workarounds to the points above:

1) People have an obsession at the moment with range which means bigger batteries which takes longer to charge. We need a cultural change so people are incentivised to charge smaller amounts at time, like we are happy to charge our phones several times a day without thinking. No need to have 100% charge all the time if there is better charging infrastructure, just like not having a full tank all the time because there are filling stations everywhere.

Some EVs have a VTL (vehicle to load) function which can supply power your home during peak periods.

2) This is true to an extent, there isn't enough lithium or rare earth metals in the world so we need to develop alternative battery chemistries such as sodium-ion.

3) Fossil fuels and nuclear are very important to provide baseload power generation.

However in countries like Australia, 1 in 4 homes have their own solar power and this is becoming more common, allowing people to charge at home. Not uncommon for homes to have a system up to 10kW which can provide 100-200km range per day (assuming 15kWh per 100km) in addition to household demands. Plenty enough.

Variations in supply/demand can also be compensated with battery farms and other energy storage which is important for renewables.

4) This will happen regardless of whatever cars people choose to drive. If anything this means less consumption of petroleum and depletion of deposits.

5) They are moving away from cobalt, of which 3/4 of the world's supply came from Congo, aka child labor.  Mining will always have issues.

6) Of course it is. The US and Europe want to reduce their dependence on OPEC countries which can be volatile and run by authoritarian regimes. The key word is sustainability - making existing resources last longer.

Hybrids - this is a good solution. The new Prius uses just 4.7/100km which is very good and more makers are offering hybrid versions of their ICE vehicles. Hybrids are not as expensive as they used to be and are a viable alternative to pure BEVs. Plenty of Priuses with 1 million kilometres.

I think HEVs (hybrids) and PHEVs (plug-in hybrids) offer the best of both worlds and are the immediate solution. They also excel in the city where most people live and use the fraction of lithium of BEVs.

8
Technical | How To / Re: Kymco stumbles at cruise speed?
« on: December 06, 2023, 01:28:13 PM »
The stator for the Yamaha Majesty 250 fits the Kymco Downtown 300i perfectly!

9
Downtown 300 / Re: DT 300 Battery warning light, bad rectifier?
« on: November 09, 2023, 03:15:00 AM »
One very important note about heat affecting the regulator-rectifier - in the Downtown 300, the regulator is located directly above the exhaust pipe manifold so it is exposed to a lot of hot air, especially when the scooter is not moving. Heat is bad for electronics, even more so when it's excessive exhaust heat.

Julio that looks like a good job - I would've done the same if I didn't have a genuine part. Some ideas to help with the cooling:

1) Airflow. Remove or cut out the plastic guard just underneath where the regulator sits to the right side of the seat tub. This will allow more air flow to the regulator. In the Downtown 350 there is no plastic guard and a huge gap under the body panel so airflow is really good. Also mount it where there's more airflow - if you can move it somewhere else using longer wires.

Airflow from a moving bike is superior to a fan, engine radiators work the same way.

2) Heatsinking. Ruffus's idea to combine heatsinks is really good. You can also use thermal tape and bolts to join two heatsinks together for more cooling capacity and heat dissipation. Don't be afraid to drill holes in the metal where there are no electronics.

I have added photos of the Downtown 350's regulator location - the left side under the left body panel, above the airbox where it is not exposed to either engine or exhaust heat.

10
Downtown 300 / Re: DT 300 Battery warning light, bad rectifier?
« on: November 08, 2023, 07:52:05 AM »
The regulator-recitifier is known to fail on the Downtown 300. Follow the steps above to ensure it's not the stator. The first symptoms is as you said, the red battery warning light due to low voltage. It is too weak to handle the required current draw and cannot comfortably handle the two low beams which are 35W X2 = 70 watts.

Replace the rectifier with a genuine part. Kymco has fixed this issue with the Downtown 350 by changing to a different design.

11
New CVT transmission filter delivered and installed. Easy job and now the CVT has excellent airflow and cooling.

12
Mulling this over once again:
Might have been an idea to create airholes to ventilate this headlights a little.
If it has been aired for years already, cannot harm anything, for its covered anyway.

I did think about that. That's why I used flyscreen in the repair because if the JB weld peels off, the flyscreen will remain and help keep out some water and debris.

13
nice job and thanks for the pics! Hard to believe Kymco would put out a scoot that melts its own headlight housing! Seems like water intrusion would be a problem for those who park outside or regularly ride in the rain.

The hole was somewhat protected from the weather with at least 3 layers - the windshield, windshield trim and body of the headlight so no direct exposure but it would be an issue long term due to dust and water.

Also, speaking of water intrusion, interestingly there are 4 vents on the headlight body to drain water and vent air.

14
..reasonable job Mouse, well done, txs for sharing...

Q: does this JB bond chemically (unseparable) with this headlight plastic no matter which material it is? ABS, PP, PPE,...

For me the result was very good, it was impossible to peel away the JB weld from the headlight.

According to the reviews and official JB replies it doesn't work well on either PP, PE or ABS. I think it is more of a filler for plastics which I bought it for as other epoxies tend to be too runny. Alternatively I could've used Car Body Sealant (such as Sika 227) or melted a plastic panel over the hole.

15
6) Leave the JB weld for an hour to cure (30 minutes to sanding time but  wait 1 hour to be safe) and shine a light into the headlight to make sure there are no leaks. Otherwise mix up more JB weld and cover the holes.

Finally, put everything back together. Done.

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