Reiju MRT 50 cut out now wont start

[Griifin29]

Hi Folks, should be simple but I'm stuck. My son's MRT 50 (2015) was going along perfectly when it just cut out and died. He said it didn't splutter like when it ran out of petrol once, he said it just quickly stopped running.

Not seized and you can operate kick start. Wont bump start and shows no sign of life.

Not long ago we changed the spark plug and the HT lead cap (turns out the cap was missing the clip that makes a secure contact with the plug top so kept cutting out).

Plug isn't oily or worn, looks normal to me. Sparks when you kick it over.

The bike has no battery (I find that really weird these days) but when kicked the lights all come on momentarily.

Full tank of new fuel (well about 10 miles in), definitely in on position. Would have thought it would splutter or backfire etc if fuel not getting through.

Don't know anything about these little bikes so any help appreciated, he uses it for communting to his apprenticeship so needs fixing asap. I have managed to get it transported home so looking forward to some tips.

Many thanks

[McHattrick]

My son also has an MRT 50, same age.
It's been a bitch to start, but haven't had any probs with it cutting out.
I know our problem is fuel starvation. I think the carb float sticks. A good bit of tapping usually resolves problem. Long term answer is probably strip it down and clean it.
If you have good spark, then check carb/fuel.
____________________
If it aint broke... fix 'til it is.

[jaffa90]

Try kick starting a few times with full choke & throttle and see if the plug is wet with fuel.
"""Sparks when you kick it over."""
Can you here the spark and is it blueish?

[Griifin29]

Thanks guys, it usually starts first or second kick.

So if I kick it over a few times and the spark plug isn't wet then suggest fuel ? is that right ? Suprised it didn't splutter but maybe he didn't realise.
When I got to him at the side of the road he'd tried it for a good while and I tried about 10-15 kicks I guess. Spark plug was pretty dry when I removed to check for a spark.

Spark looked to be pretty strong couldn't really tell colour.

McHattrick - have you tracked down a manual of some description, I know wanting good old Haynes is unlikely but ......

[jaffa90]

Ok, so can you removed the fuel pipe at the carb and see if fuel is peeing out with tap ON ?

[McHattrick]

Here are links to Owner manual and Workshop manual
https://www.manualslib.com/manual/1079411/Rieju-Mrt-50.html
https://www.manualslib.com/manual/1088567/Rieju-Mrt-50.html?page=2#manual

There isn't really much help there in Troubleshooting but page 40 on Workshop shows where the Fuel/Oil is mixed and how to access the carb.

I resolve our fuel prob by switching off fuel, kicking over for a while, light taps on side of carb (hoping to un-stick float) and fuel on again.
Sometimes works straight away, sometimes takes a bit of perseverence.
However you may have a different issue.
Good Luck.
____________________
If it aint broke... fix 'til it is.

[Griifin29]

[Griifin29]

[jaffa90]

Next to try is easy start spray or carb cleaner spray or volatile spray into the inlet manifold with air filter removed and choke off and then kick start with throttle.

[McHattrick]

[Nobby the Bastard]

A reed valve can't really get stuck open. If its put in backwards it will be kept closed but the bike was working before so it's not that.

Potentially the leaves of the valve could snap off but that's unusual.
____________________
trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
Triumph Sprint ST 1050

[Griifin29]

[jaffa90]

Well if you have a good spark and you have introduced fuel into the air intake manifold then it`s a compression / suction test.

[Easy-X]

This is not hard stuff

Take out spark plug, put thumb over hole, attempt to start engine. Is there any pressure pushing against your thumb?
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Royal Enfield Continental GT 535, Husqvarna Vitpilen 401, Yamaha XSR700, Honda Rebel, Yamaha DT175, Suzuki SV650 (loan) Fazer 600, Keeway Superlight 125, 50cc turd scooter

[Nobby the Bastard]

[Easy-X]

[Griifin29]

Thanks for the help folks, the comment 'this is not hard stuff' well yep I agree but nothing is hard when you know how to do it.

Decided to take cylinder head and barrel off, looks liek one of the piston rings is welded to the piston and the barrel is scored.

So I've found that problem, I guess before replacing I need to look at why but as no water came out of the water pipes I'm guessing the radiator was empty through neglect or from a leak so will ne looking at that first.

[Easy-X]

Nobody likes to get their ring damaged

Lack of coolant wouldn't help, certainly, but is/was it getting oil?
____________________
Royal Enfield Continental GT 535, Husqvarna Vitpilen 401, Yamaha XSR700, Honda Rebel, Yamaha DT175, Suzuki SV650 (loan) Fazer 600, Keeway Superlight 125, 50cc turd scooter