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Messages - Yoni159

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1
Downtown 300 / Re: Throttle body cleaning
« on: March 30, 2025, 09:52:56 PM »
Spraysoak the throttle body entirely, let it sit a minute or two then use a vacuum cleaner to get the dirt and cleaner out. Wipe with a clean cloth.
I'm completely dismantling it from the engine. I'm taking it out.

2
Downtown 300 / Re: Throttle body cleaning
« on: March 30, 2025, 08:40:00 PM »
Its not really exciting dirty, but could use a cleaning.
Make sure to use brake cleaner first and a vacuum cleaner during this action.
i use bg moa throttle body cleaner.. what do u mean vacuum cleaner?

3
Downtown 300 / Throttle body cleaning
« on: March 30, 2025, 05:46:44 PM »
Do i need to clean it? Or it looks ok? What are the benefits of cleaning throttle body?
https://ibb.co/gZmmh4Jd
https://ibb.co/N2q7YpRX
The scooter is 81000km

4
Downtown 300 / Downtown 350 air filter gasket size
« on: March 02, 2025, 12:02:20 PM »
Someone know maybe the size of the gasket inside the air filter xbox in downtown 350? There is 2 gaskets 1 is the air filter and 1 is the air filter cover.. i want to order some form AliExpress

5
Downtown 300 / Re: Hitting max revs
« on: February 24, 2025, 04:59:35 PM »
Downtown engines are pretty bullet-proof so I doubt and damage done.  All the same such 'ooligan behaviour is not recommended!
i hope so.. this engine have a rev limiter? I remember i was sounds very weird like something preventing it from go higher

6
Downtown 300 / Hitting max revs
« on: February 24, 2025, 04:52:22 PM »
I was bored and i put my downtown 350i on centre stand and pull the throttle all the way down until it went to 9-10k rpms.. the engine didnt shuts off but its was weird i did it just because i was curious only now i understand this is bad.. i did it several times for few seconds.. but everything is fine.. maybe i destroyed something i didnt know? It will cause my Engine to fail earlier than normal?

7
Downtown 300 / Re: Disconnected engine oil pressure cap..
« on: February 07, 2025, 02:49:14 PM »
Not at all, but IF your engine suffers an oil issue, you will not notice it and destroy it, which might be more costly than a €20,- switch.
so the purpose of this oil pressure sensor is ONLY warning you if something fail? Thats it?

8
Downtown 300 / Re: Disconnected engine oil pressure cap..
« on: February 06, 2025, 08:01:07 PM »
Reason for this switch is do indicate enough oil pressure within your engine to lubricate all neccessary turning parts like bearings, crank etc.
Ignition on = oil pressure light ON
Off after a few seconds.
Oil light permanent ON = to less pressure and NO lubrication.

No light can be:
-faulty oil pressure switch (pretty rare)
-cable lose or broken (by exhaust pipe?) suspected
-cable shoe corroded
-faulty fuse
Pls go through all of this.

If all fails, take the pressure switch out, go to a motorcicle dealer (they can benchtest it) and buy smtg similar with the same PSI stamped on it.
if i would ride without this switch working it will cause damage?

9
Downtown 300 / Re: Disconnected engine oil pressure cap..
« on: February 06, 2025, 06:29:36 PM »
No harm to be ecpected at alI IF your scoot wasn't faulty before.
Just bend contacts together a bit, replug, and its good again.
Cable should be ABOVE exhaust pipe, fix it with a cabletie.
its still not working i still dont have red oil light on the dashboard.. what the purpose of this oil pressure sensor?

10
Downtown 300 / Disconnected engine oil pressure cap..
« on: February 06, 2025, 12:59:08 PM »
https://ibb.co/Q7nvhy6H
This is bad? I cant put it inside again its not working... When i switch on the scooter i must have red oil light but now i dont have it? This will harm my scooter?

11
General Discussion / Re: How to change/flush the coolant?
« on: January 18, 2025, 08:27:31 PM »
This plastic "extension" tank should be filled maximum (cold motor) up to 1/3  of its volume (marks somewhere on the sidewall).
Should fill itself after awhile of running motor (watch).
Radiator closed.

COLD motor, fill with motor running
WARM/hot motor, fill with motor NOT running
(reason: open or respectively closed thermostat [example])

Does NOT make a difference slow or fast filling, only flushing if neccessary by garden-hose.
show i run the engine also with regular water to clean the system and then fill with new coolant?

12
General Discussion / Re: How to change/flush the coolant?
« on: January 16, 2025, 06:53:30 PM »
There are two hoses at your waterpump, a thicker and a thinner:
-engine OFF
-open radiator cap
-radiator FULL?
-thinner hose off waterpump
-radiator level SINKING?
-coolant out of thin hose in steady stream?
-if YES,  replug thin hose
-top up coolant in radiator
-start engine
-bubbles from radiator
-let run and see, maybe top up again, close
and what about the resivor? Fill it in the end or in the begging?

13
General Discussion / Re: How to change/flush the coolant?
« on: January 16, 2025, 03:48:33 PM »
are you filling your coolant very slowly? Squeezing and tapping on the hoses during the process to 'burp' out extra air?
i will try squeezing the hopes.. and about filling i need to fill it slowly? And filling with the engine running or not?

14
General Discussion / How to change/flush the coolant?
« on: January 16, 2025, 12:30:12 AM »
Last time i tried it ,i oped the radiator cap and start the engine to take out the air but nothing happend and the water just came out from the radiator cap and the scooter was overheating... What i did wrong?? I know this is the way to change coolant but something went wrong. Its kymco downtown 350i

15
Downtown 300 / Re: Weird transmission oil colour
« on: November 10, 2024, 07:11:21 PM »
YES, even it is a little bit of water, a new block costs for sure more than this seals.
Just imagine instead of oil you put a piece of butter in this gearbox.

I would not see this oilseals too tricky and expensive to change, since all are approachable from outside ( if it is this gear shown in pics)
this seal is inside. Outside is the bearing from what is saw so i need to open all the gearbox and i cant do it and it will be expensive work at the mechanic

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