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Downtown 300 / Re: Help me start my downtown
« on: April 17, 2025, 02:48:38 AM »An update on my problem.
The only thing that i didn't do was to use jumcables from a car. because lack of cables and car
The thing that I did, with an advice from a friend, was to keep the starter button pressed more that 1-2 seconds. And after a few rounds of 7-10 seconds, at some point it STARTED!
This was two weeks ago. Since then, no problem at all, started fine even after a few days of unused.
I still don't know the cause, I will think that was gunk in the fuel.....
Now that the problem was resolved, advice me on how to protect those wires and electrical connections, because I want to clean that area (you see how dirty it is around there)
Kymco already has a procedure for this in the manual. It's called the 'anti-flood' because the spark plug can get wet from failed starts.
1) Turn on the ignition
2) Open the throttle
3) Start the bike normally with the throttle open
You might have to try this with the the throttle in different positions until it starts.
https://www.manualslib.com/manual/1636965/Kymco-Downtown-350i.html?page=354
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General Discussion / Re: new battery volt level
« on: April 17, 2025, 02:46:08 AM »bought a new Yuasa battery for my little Ninja. Filled it with the supplied acid last night and let it sit a bit before I put it on the charger. I thought I'd check the volts on it before charging, just for the heck of it. I assumed it would be very low....but it was 12.87 volts. I guess I don't completely understand the way a battery works. I had no idea just adding acid would put it as this charging level.
I did test it, after charging, with my battery tester. It checked out at 100% health, as it should. It actually showed a higher CCA ability than it is rated for.
This is how it's supposed to work. A rechargeable battery is simply a reversible chemical reaction.
When you charge a lead-acid battery to 100%, the sulfuric acid concentration is at its maximum limit. So adding fresh acid to a new battery for the first time will give it a charge close to 100%. The higher the concentration of acid, the higher the voltage.
Then the acid will react with the lead/lead oxide plates and the voltage will go down a bit.
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Downtown 300 / Re: New Kymco 350 improvements
« on: March 22, 2025, 01:27:56 PM »
The 2nd gen Downtown 350 has a remapped ECU, traction control and a better smart dash with Noodoe.
I can't comment on the quality of the suspension or seat etc, it does look the same.
I can't comment on the quality of the suspension or seat etc, it does look the same.
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Downtown 300 / Re: Weird transmission oil colour
« on: November 27, 2024, 11:35:46 AM »
There might be a breather hose from the transmission to the air box, make sure it's not leaking which could let water in.
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Downtown 300 / Re: Engine Swap Required
« on: November 27, 2024, 11:34:16 AM »
I had the same issue as well years ago, the 19mm nut holding the drive pulley came off and the loose drive pulley grinded the splines on the crankshaft. Fortunately the bike lasted until 80,000km or so, then I got the 2nd gen Downtown which I still ride today.
Note: put threadlock on the drive pulley nut and torque to spec. No issues since.
Note: put threadlock on the drive pulley nut and torque to spec. No issues since.
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Downtown 300 / Re: Downtown GT 2024 air filter box intake design problem
« on: November 09, 2024, 11:22:19 PM »
This is definitely an oversight by Kymco. They have been putting the air intake at the front for years, why did they change it.
I've also noticed there isn't a fender or mud guard that covers the top of the actual rear wheel, which should sit very close to the tyre surface. See the photo attached for the 2nd gen Kymco Dowtown 350i, which has this design to stop water being splashed forward and a hidden air intake on the top left of the air box cover to prevent water ingestion.
I think this will be an ongoing problem unless you are willing to modify the airbox (cover only) yourself. Maybe block off the rear vents, drill some extra drain holes and cut an intake in the front. This may affect warranty but simply replace the cover with an original one when required.
I've also noticed there isn't a fender or mud guard that covers the top of the actual rear wheel, which should sit very close to the tyre surface. See the photo attached for the 2nd gen Kymco Dowtown 350i, which has this design to stop water being splashed forward and a hidden air intake on the top left of the air box cover to prevent water ingestion.
I think this will be an ongoing problem unless you are willing to modify the airbox (cover only) yourself. Maybe block off the rear vents, drill some extra drain holes and cut an intake in the front. This may affect warranty but simply replace the cover with an original one when required.
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General Discussion / Re: Tyres for DTX360
« on: November 09, 2024, 11:08:34 PM »Glad to hear good things about the Michelin City Grip 2 tires. I only have about 2000 miles on the stock Kendras on my People S 150, but want the best rain tires I can get. I get real nervous riding in the rain, and I understand the City Grip 2 is the go-to tire for wet weather.
Pirelli Diablos or Pirelli Diablo Rossos. The best tyres I've had for rain for 10 years, I just ride very similar to dry weather.
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Downtown 300 / Re: Error 37
« on: July 19, 2024, 01:20:02 PM »
Tested like this? Screenshot from the service manual. If it's truly faulty the bike won't run.
Might be easier just to replace the whole ignition coil.
Might be easier just to replace the whole ignition coil.
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General Discussion / Re: was this a good price for a DT 300 ?
« on: July 15, 2024, 07:43:17 AM »
Definitely too much, even for the time before inflation.
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Technical | How To / Re: HELP!
« on: July 04, 2024, 06:00:35 AM »
Looks like they changed the design from the more common sliders on the ramp plate to pins which would slide inside the cylindrical metal holes (and bushings) on the variator.
Also your photo shows a roller with a very worn flat spot, more than enough reason to replace the rollers soon. They can get stuck and cause all kinds of issues.
Also your photo shows a roller with a very worn flat spot, more than enough reason to replace the rollers soon. They can get stuck and cause all kinds of issues.
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Technical | How To / Re: Does voltage matter on glass fuses?
« on: June 18, 2024, 02:06:20 AM »
The voltage is simply the maximum rating for the fuse. 32V is fine and you will still find 250V fuses in automotive applications such as DC-DC chargers and inverters etc.
It's ok to go a bit higher with current (amp) ratings. Fuses never blow at the exact amps they are rated for, it just varies the time to blow.
It's ok to go a bit higher with current (amp) ratings. Fuses never blow at the exact amps they are rated for, it just varies the time to blow.
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Technical | How To / Re: ABS light
« on: June 18, 2024, 02:01:41 AM »
This is normal and indicates that the ABS is working.
If the light stays on when riding then there is a fault, most commonly the wheel speed sensor and rarely the ABS module.
If the light stays on when riding then there is a fault, most commonly the wheel speed sensor and rarely the ABS module.
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Technical | How To / Re: DTX360 (320cc) Oil Change
« on: June 06, 2024, 01:32:06 PM »
This is the correct procedure and the photos are helpful.
The engine is identical to the Downtown 350i but the 350i specifies 1.3L oil capacity. Unknown why Kymco made the change but the engine is not too fussy as long as you do regular oil changes and check levels regularly as I believe dilution with fuel is still an issue.
The oil drain bolt is 17mm and oil filter cap is 24mm for reference.
The engine is identical to the Downtown 350i but the 350i specifies 1.3L oil capacity. Unknown why Kymco made the change but the engine is not too fussy as long as you do regular oil changes and check levels regularly as I believe dilution with fuel is still an issue.
The oil drain bolt is 17mm and oil filter cap is 24mm for reference.
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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.
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.