I think i detonated my engine

[hamodyjog]

Hey i have a 50 cc Jog and i got everything in tune and it seized, then it unseized it self and started up after some time but the Kickstarter is very light so it almost has no compression, i need to rebuild it now, any suggestions? Should i just replace the rings or should i replace the piston and cylinder? And what do you think about big bore kits? Should i do it or should i not ? And what are the pros and cons

[tiny]

If it was seizing on ya might as well go whole hog and replace the Cylinder and piston with either a good 50cc or 70cc kit. Most of the 70cc kits ive looked at for my wife's Vino come with a jet to place in you carb. Mind you if you go bigger you my need to replace your exhaust.

[hamodyjog]

Jul 11, 2018 20:51:49 GMT -5 tiny said:

If it was seizing on ya might as well go whole hog and replace the Cylinder and piston with either a good 50cc or 70cc kit. Most of the 70cc kits ive looked at for my wife's Vino come with a jet to place in you carb. Mind you if you go bigger you my need to replace your exhaust.

I've already got an unrestricted exhaust it's just a straight pipe, and btw i hate the yamaha vino i don't like how it rides i don't like how you sit on it i prefer the jog, and tell me about those 70 cc kits what brand did you buy and from where and how much did cost? What did you have to fabricate?

[ThomasTPFL]

Straight pipe?

[hamodyjog]

Jul 12, 2018 0:52:55 GMT -5 ThomasTPFL said:

Straight pipe?

kinda i don't know how to post a pic of it but it's a straight pipe with mufflers all around that are just there for looks

[repherence2]

Got some problems if you "got everything in tune and it seized". That is not supposed to happen.

[Lucass2T]

Jul 11, 2018 17:11:38 GMT -5 hamodyjog said:

Hey i have a 50 cc Jog and i got everything in tune and it seized.
That means the engine didn't get enough oil or cooling. Remove the oil pump and start premixing. Also check the cooling shrouds.

Then it unseized it self and started up after some time but the Kickstarter is very light so it almost has no compression, i need to rebuild it now, any suggestions? Should i just replace the rings or should i replace the piston and cylinder?
Remove the cylinder and assess the damage. Post some pics here.

And what do you think about big bore kits? Should i do it or should i not ?
Do more research and draw your own conclusions.

It's a straight pipe with mufflers all around...
Never seen a pipe with 'mufflers all around'. Please post some pics.
49ccscoot.proboards.com/post/7984

[hamodyjog]

Jul 12, 2018 5:25:19 GMT -5 Lucass2T said:

Jul 11, 2018 17:11:38 GMT -5 hamodyjog said:

Hey i have a 50 cc Jog and i got everything in tune and it seized.
That means the engine didn't get enough oil or cooling. Remove the oil pump and start premixing. Also check the cooling shrouds.

Then it unseized it self and started up after some time but the Kickstarter is very light so it almost has no compression, i need to rebuild it now, any suggestions? Should i just replace the rings or should i replace the piston and cylinder?
Remove the cylinder and assess the damage. Post some pics here.

And what do you think about big bore kits? Should i do it or should i not ?
Do more research and draw your own conclusions.

It's a straight pipe with mufflers all around...
Never seen a pipe with 'mufflers all around'. Please post some pics.
49ccscoot.proboards.com/post/7984

if i know how to, i would've posted pics of it, anyways, i found that a piece has broken of from the piston, which is what caused it to seize, then when i turned it over somehow it got out of the way of the piston and it started, don't worry i got that piece out and i looked for other ones, i still haven't found out why it broke, because it had oil, it was light oil , and it wasn't running for that long at all, i ran it for 5 mins max with only me on it and i wasn't pushing it hard, and it blew up after i put on the rear brake cable, i was at a friend's house and he got me one so i put it on , 5 mins later i started it and i was going home tried out the rear brake works just fine if you max it out it even locks the tire up, that's why i thought the rear brake is what blew my engine, could be just a coincidence

[Lucass2T]

Jul 19, 2018 21:58:03 GMT -5 hamodyjog said:

Jul 12, 2018 5:25:19 GMT -5 Lucass2T said:

If i know how to, i would've posted pics of it.
Anyways, i found that a piece has broken of from the piston, which is what caused it to seize.
Then when i turned it over somehow it got out of the way of the piston and it started.
Don't worry i got that piece out and i looked for other ones.
I still haven't found out why it broke, because it had oil.
It was light oil and it wasn't running for that long at all.
I ran it for 5 mins max with only me on it and i wasn't pushing it hard.
It blew up after i put on the rear brake cable.
I was at a friend's house and he got me one so i put it on.
5 mins later i started it and i was going home tried out the rear brake, works just fine.
If you max it out it even locks the tire up, that's why i thought the rear brake is what blew my engine.
Could be just a coincidence.

Cleaned up your story a bit with some punctuation. It really was difficult to read before.
Yes, pulling the brake and a locked up motor is a coincidence. Theres no causal relationship between those two events.
btw, posting pics is explained here:

49ccscoot.proboards.com/post/7984

Im really curious for some pics of that piston

[hamodyjog]

Jul 20, 2018 4:00:29 GMT -5 Lucass2T said:

Jul 19, 2018 21:58:03 GMT -5 hamodyjog said:

If i know how to, i would've posted pics of it.
Anyways, i found that a piece has broken of from the piston, which is what caused it to seize.
Then when i turned it over somehow it got out of the way of the piston and it started.
Don't worry i got that piece out and i looked for other ones.
I still haven't found out why it broke, because it had oil.
It was light oil and it wasn't running for that long at all.
I ran it for 5 mins max with only me on it and i wasn't pushing it hard.
It blew up after i put on the rear brake cable.
I was at a friend's house and he got me one so i put it on.
5 mins later i started it and i was going home tried out the rear brake, works just fine.
If you max it out it even locks the tire up, that's why i thought the rear brake is what blew my engine.
Could be just a coincidence.

Cleaned up your story a bit with some punctuation. It really was difficult to read before.
Yes, pulling the brake and a locked up motor is a coincidence. Theres no causal relationship between those two events.
btw, posting pics is explained here:

49ccscoot.proboards.com/post/7984

Im really curious for some pics of that piston

sorry it's my bad it's actually a piece broken from the cylinder, i wasn't concentrating i was up till 6 am, anyways I'll post some pics today of the muffler and the cylinder, and of my beautiful bike , thanks btw