How to set the timing on a scooter

This was done on a 150cc scooter 50cc scooter should be the same process.
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[@unclethrash4810]

Thank you so much! Such basic information considering how available the parts are and couldn't find how to time it. You are a good dude 👍

[@dagrumpr4165]

this is actully really helpfull i messed mup my 150 by doing a rookie mistake and not marking where the timing chain and the cam line up so thank you

[@grazz7865]

That’s what I had to do. The engine did not want to stay exactly where the “T” line was on the flywheel. I had to hold it there like you said and then make sure the holes on the camshaft were lined up.

[@eaglepasss3580]

Thanks bro that's all I needed

[@DieselRamcharger]

T means TDC and F means fire {when the spark happens} T does NOT mean timing.

[@kennyremouremovich8788]

T is for timing. The innocence of youth...

[@s.f.morris7331]

good video. did you also know that if you remove spark plug you can turn it much more easily

[@MrBerenguer67]

Hi is easy to change a head and piston on Peugeot v clic Thks a long we teck to change thank you

[@A_Stereotypical_Heretic]

Can someone tell me what that one bolt is on the piston jug? It's by itself... threads down to I believe the oil channel...what is its purpose?

[@chriss4365]

Piston jug?

[@A_Stereotypical_Heretic]

@@chriss4365 the cylinder body. The jug. The body that the piston travels in, where the actual cylinder is. There is a flange bolt on the side, it goes nowhere...and holds nothing down. I was just wondering what it was.

[@chriss4365]

@@A_Stereotypical_Heretic I think you mean the hole on the outside. I'm guessing its to hold down a mounting bracket for something but no idea what.

[@MksDrives]

I replaced my crankshaft on my 50cc vespa but now it takes really long to make some rpms if given full throttle what can I do?

[@chriss4365]

You will have to investigate. I would start with checking the air filter and fuel filter and look for a pinched air intake hose. Why did you change the crankshaft?

[@MksDrives]

​@@chriss4365I changed it for a 'sport crankshaft' with the intention to gain some performance but my air intake isnt clogged and my fuel filter is open

[@chriss4365]

@@MksDrives how can a performance crank shaft work? I'm guessing it's lighter. If the engine was fine before I'd say the culprit is the new crankshaft. Check the cam and crankshaft bearings. Did you install bigger jets?

[@JordanAnderson-pp5hu]

I adjusted the timing correctly and mine will try to go but won't actually fire up and it does have enough compression. Checked valve lash and everything

[@chriss4365]

You have an issue with either fuel spark or air.

[@jordananderson8299]

​@@chriss4365 Those are not the issues. carburetor, CDI, coil, basically everything is brand new and I did not have an intake leak

[@chriss4365]

@@jordananderson8299 my next guess would be a vacuum leak. Check those rubber hoses they dry rot fast.

[@46Bax]

6 months later, what was the problem ?

[@quincytucious9988]

I have the same problem, its starts up but really hard, before i changed the cillinder head (cause of broken spark plug threads) it started just fine. I checked everything new carb to..

[@jkcjayaruk4993]

Ok thanks

[@jasoncarthew2279]

If timing is out would it cause a progressive tap and smoke come from exhaust And a hard start?

[@chriss4365]

Timing will not go out on its own, unless the tensioner breaks allowing the chain to pop off. Hard start is a classic symptom of the valves needing to be adjusted they need to be adjusted every few thousand miles.. Their are videos on the channel on how to do it. You will need to buy a valve cover gasket.

[@jasoncarthew2279]

@@chriss4365 I changed my valve stem seals now it's like it

[@chriss4365]

@@jasoncarthew2279 valves could still need adjusting. You have to line up the 2 small holes and the bigger hole on the top with the magnet marks as showed in video to make sure its not off. Why did you change the guides? Had my bike almost 10 years never had to change them.

[@jasoncarthew2279]

@@chriss4365 cuz my bike wqs drinking oil so thought it could be valve stem seals I got a cbr 125. I ddi valve agajn today. Bike starts but when I drive the engine is a bit shaky. There is no smoke now after I redone my intake valve clearance. Now engine shaky lol

[@jasoncarthew2279]

Did psi check with no throttle it's 125psi with throttle it's 155 should be 195

[@alexcruz9449]

i cant even get the t do get on the thing that sticks out what do i do it wont let me spin it enough it just stops

[@chriss4365]

You probably hit a compression stroke. Try it with the spark plug removed.

[@alexcruz9449]

@@chriss4365i took out the spark plug and i still cant move it to the t its sitting on the f right now

[@chriss4365]

@@alexcruz9449 why are you needing to reset the timing? You can try turning the engine using a socket on the magnet nut. Turn clockwise. Is the timing chain connected? If it is it could be opening a valve stopping the piston. You have to turn it into place before you install the chain on the cam. Make sure the cam isn't opening a valve.

[@alexcruz9449]

@@chriss4365 I bought it from some guy and he said the timing need to be set

[@kennyremouremovich8788]

Sounds to me like engine damage has occurred. If the engine won't spin a full 360° you most likely have a bent valve and the piston is hitting that valve because it's stuck open inside the combustion chamber

[@cheersmate385]

Won't the piston come out of the TDC when you move the flywheel?

[@chriss4365]

you only move it slightly to hold it on the T mark. This works fine as the engine fired right up after reinstalling it. This clip is from my scooter video redoing the entire engine at the end you can see me start the engine up.

[@DieselRamcharger]

the T mark on the flywheel represents where TDC is at. TDC is an angular position. men the marks are lined up you are at Tdc if you move it, move it back.

[@grazz7865]

That’s what I was thinking. But The engine won’t stay right on the “T” line without holding it in place. The engine doesn’t fall into place right on the “T” line. I held it on the “T” line then lined up the holes on the camshaft. I hope i did it right

[@burt1758]

Top dead center when putting it in time can be on compression i fuked up and did that ran like shitttttt. Im waiting for my cylinder head and rocker arm assembly to get here this week. DON'T Time it on compression.

[@chriss4365]

That doesn't matter because you line up the T mark with the piece of aluminum and at same time line up the 3 holes on the cam gear. The piston may be in compression stroke then but it does not matter. Other engines maybe but not this one.

[@Ace-tr3pd]

I don't see the t

[@chriss4365]

You cannot see the T in the video or on your magnet?

[@DZRP2881]

😂😂😂😂 we can't see bro

[@reeceoconnorryan6281]

I lined my 150cc gy6 crank on the mark before the T on my flywheel (THIS IS WHAT MY MARKINGS LOOK LIKE ON MY FLYWHEEL: l T F l My flywheel wanted to rotate just past the mark a little bit if I let it go ( roughly about 5 - 10mm past ) so I had to hold it back that little bit so it was perfectly on the line before the T mark and then make sure the cam shafts lobes are pointing down towards block and big hole in the sprocket is facing outwards towards valve cover with the two markings ( one on either side of the sprocket ) are perfectly inline with the mating surface between of valve cover / valve body ( CD ) ^

[@chriss4365]

Yeah you have to hold it in place.