2 Yr Old Fino spluttering then stopping?

[JeffersLos]

My son bought a Fino 125 two years ago and has put 65000 km on it. His GF does Grab delivery in the evenings, so it has high mileage. 

 

After riding it for 5 minutes, it starts to splutter when applying throttle and then stops. 

 

A small smell of burning. 

 

I thought it was out of coolant, but apparently it doesn't use any coolant. The closest repair guy came to it and topped it up with oil, saying that was the issue.

 

Rode it maybe 2 or 3 km and it started losing power and spluttering again, but didn't cutout when going easy on the throttle, and the burning smell wasn't noticeable. 

 

It seems to happen when it gets hot, after 5 minutes or so of riding.

 

Obviously will take it for a service, but they will just change the oil and oil filter, spark plug, brake pads and brake fluid, and pump up the tires without using a gauge. 

 

Any ideas on what the culprit could be?

 

TIA.

Edited Friday at 06:44 AM by JeffersLos

[KhunLA]

fuel filter

[harryviking]

12 hours ago, KhunLA said:

fuel filter

 

12 hours ago, KhunLA said:

fuel filter

check air filter too. need to change sometimes.

[thaibeachlovers]

My first thought was contaminated fuel, but the burning smell complicates things.

 

I'd contact the manufacturers. I had a problem with a camera that the repair guys couldn't fix, but the manufacturers came up with a solution a day after I e mailed them.

[watchcat]

12 hours ago, KhunLA said:

fuel filter

 

The bike is 2 years old, most people never change it.

[Ganoga]

Have the valves ever been checked properly?

[LukKrueng]

2 hours ago, watchcat said:

 

The bike is 2 years old, most people never change it.

2 years old with 65k km. That's a lot of road for a small engine.

And it does sound like fuel problem. Might be the fuel hose (burning smell might suggest that)

Edited Saturday at 12:37 AM by LukKrueng

[johng]

I suspect it ran out of oil causing damage to the piston,valves and bearings...a shade tree mechanic can "fix" it  for 3000 +++ baht

depending on the damage found when the engine is opened...

 

[watchcat]

45 minutes ago, johng said:

I suspect it ran out of oil causing damage to the piston,valves and bearings...a shade tree mechanic can "fix" it  for 3000 +++ baht

depending on the damage found when the engine is opened...

 

?

Wouldn't it be smoking then

[Hummin]

Get it to an proper mechanic, instead of cheap know <deleted> locals

[watchcat]

1 hour ago, LukKrueng said:

2 years old with 65k km. That's a lot of road for a small engine

 

Wife has a hond WAVE 110 ,12 to 15 years old , spedometer cable was broken about 13 + years ago it's now 3500 km.

[watchcat]

3 hours ago, Ganoga said:

Have the valves ever been checked properly?

 

Probably not, the shops doesn't even have a feeler gauge to check .

[JeffersLos]

17 hours ago, KhunLA said:

fuel filter

 

5 hours ago, harryviking said:

 

check air filter too. need to change sometimes.

 

4 hours ago, watchcat said:

 

The bike is 2 years old, most people never change it.

 

It doesn't have a fuel filter. 

 

It's carb, not FI. 

[johng]

1 hour ago, watchcat said:

?

Wouldn't it be smoking then

Depends on the damage/extent.

The "repair guy" topping up the oil

leads me to suspect..it has at some time run low or completely out of oil

they can actually run for quite a while with "no" oil before total destruction.

[Lokie]

Its Bogging, needs a Carb clean. The burning smell prob a separate issue. Nothing to do with oil...

[JeffersLos]

4 minutes ago, Lokie said:

needs a Carb clean

 

Probably easier to just get a new carb, then cleaning up one with 65km on it. 

 

How much does an OEM carb cost for a 2022 Fino 125? 

[KhunLA]

1 hour ago, JeffersLos said:

 

 

 

It doesn't have a fuel filter. 

 

It's carb, not FI. 

and yet, they sell one for it

 

Google ... " 2022 yamaha fino fuel filter "

 

[ujayujay]

Did you ever changed the Airfilter?

[kickstart]

What color is the spark plug and what is the gap? renew it, if it is black burning oil, or running rich, rings, piston worn, air filter?

White plug running weak, blocked carb, leak/lose, in/on, inlet manifold, if it is a rubber one?.

Could be fuel filter ,that Lazada post said the fuel filter is inside the fuel tank,

Burning smell drive belt? you will know if it is drivebelt, you can hear a noise from that area., or oil leaking from the engine on to a hot surface, normally the exhaust, head gasket?

Ask around for a good repair shop, they are out they, just got to find one. 

 

[Lacessit]

IMO 65,000 km is high mileage.

 

I would be checking if the spark plug was oiling up, due to piston/cylinder wear.

 

Changing the oil and spark plug won't fix it, if that is the case.

 

A compression check might be worth doing.

Edited 14 hours ago by Lacessit

[papa al]

11 hours ago, Lacessit said:

IMO 65,000 km is high mileage.

piston/cylinder wear.

.A compression check might be worth doing.

Most Thai shops don't really do compression test.

Easy, quick to pull cylinder,

then maybe a rebore, change piston & rings,  cheap.

But yes. first check the air filter, plug and rebuild carb..