Engine Help 125cc

Chinabike · 04-25-2018, 11:12 PM

Hello I got a new head cylinder for my 125cc, now its sounding like this.
I adjusted the valves. I checked timing seemed right only thing i can think of is if I put cam on 180? timing?

anyone help please? Thank you

https://streamable.com/zpb11

Chinabike · 04-25-2018, 11:18 PM

heres an other video.

https://streamable.com/t2hml

Chinabike · 04-26-2018, 10:50 AM

Can anyone help?
going to redo the head cylinder and timing today.

Weldangrind · 04-26-2018, 10:58 AM

Is there any chance that the oil feed hole in the head gasket is partially blocked? It sounds like it's starving for oil.

Chinabike · 04-26-2018, 11:43 AM

Quote:

Originally Posted by Weldangrind

Is there any chance that the oil feed hole in the head gasket is partially blocked? It sounds like it's starving for oil.

I'll check. But not sure exactly what hole you are talking about?

dirtbkr188 · 04-26-2018, 03:12 PM

Chinabike · 04-26-2018, 04:26 PM

Thanks wasn't that. Had the timing way off.
Now running pretty good. Just a little tapping at the Head. Think i need to readjust the valves again.

wheelbender6 · 04-26-2018, 08:16 PM

Whew! Glad there was no internal damage.

Weldangrind · 04-27-2018, 10:57 AM

That's an easy mistake to make. Glad you got it sorted.

Chinabike · 04-27-2018, 12:15 PM

thank all for the help.

One question, I have my valves set at .005/.005 and have a little tapping/ticking from the head.
should i go up or down with the gaps... to try an eliminate the tapping?

dirtbkr188 · 04-27-2018, 05:16 PM

Typically, you can go with .003" - intake and .004" - exhaust for these horizontal engines with a 110cc or greater displacement.

Chinabike · 04-27-2018, 06:01 PM

Quote:

Originally Posted by dirtbkr188

Typically, you can go with .003" - intake and .004" - exhaust for these horizontal engines with a 110cc or greater displacement.

Ok great thats what i was reading....I just went to do adjust it..... if its not one thing its another, my feeler only goes down to .005 ugh. I just order a new feeler.
I report back once i adjust.

thanks

Chinabike · 04-29-2018, 11:10 PM

Ok i adjust the valve to .003 / .004
main jet 120
fuel/mix 1 1/2 turns

That taping is quieter but now it sounds like this. Like it has the hiccups? Cutting in and out.

https://streamable.com/uj84e

Chinabike · 04-30-2018, 12:15 AM

Just rode it for about 30min. Got it up to 44, i didn't want to push it anymore. It feels like it can hit 60 even with the problem....When its driving it acts its jerky, seems to pull back and forth. at idle it will die or idle up and down between 2000rpm and 1100rpm. Any help?

Chinabike · 04-30-2018, 12:24 AM

Maybe its the spark plug? I only had a old one. Just a thought.

04-25-2018, 11:12 PM	#1
Chinabike Join Date: Jan 2018 Posts: 361	Engine Help 125cc Hello I got a new head cylinder for my 125cc, now its sounding like this. I adjusted the valves. I checked timing seemed right only thing i can think of is if I put cam on 180? timing? anyone help please? Thank you https://streamable.com/zpb11 Last edited by Chinabike; 04-26-2018 at 12:51 AM.
	0

04-26-2018, 10:58 AM	#4
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	Is there any chance that the oil feed hole in the head gasket is partially blocked? It sounds like it's starving for oil. __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
	1

04-26-2018, 08:16 PM	#8
wheelbender6 Join Date: May 2015 Location: Houston area Posts: 1,902	Whew! Glad there was no internal damage. __________________ "Its not WHAT you ride; its THAT you ride"
	0

04-27-2018, 10:57 AM	#9
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	That's an easy mistake to make. Glad you got it sorted. __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
	0

04-30-2018, 12:15 AM	#14
Chinabike Join Date: Jan 2018 Posts: 361	Just rode it for about 30min. Got it up to 44, i didn't want to push it anymore. It feels like it can hit 60 even with the problem....When its driving it acts its jerky, seems to pull back and forth. at idle it will die or idle up and down between 2000rpm and 1100rpm. Any help? Last edited by Chinabike; 04-30-2018 at 01:44 AM.
	0

04-25-2018, 11:18 PM	#2
Chinabike Join Date: Jan 2018 Posts: 361	heres an other video. https://streamable.com/t2hml
	0

04-26-2018, 10:50 AM	#3
Chinabike Join Date: Jan 2018 Posts: 361	Can anyone help? going to redo the head cylinder and timing today.
	0

04-26-2018, 03:12 PM	#6
dirtbkr188 Join Date: Aug 2009 Posts: 510
	3

04-26-2018, 04:26 PM	#7
Chinabike Join Date: Jan 2018 Posts: 361	Thanks wasn't that. Had the timing way off. Now running pretty good. Just a little tapping at the Head. Think i need to readjust the valves again.
	0

04-27-2018, 12:15 PM	#10
Chinabike Join Date: Jan 2018 Posts: 361	thank all for the help. One question, I have my valves set at .005/.005 and have a little tapping/ticking from the head. should i go up or down with the gaps... to try an eliminate the tapping?
	0

04-27-2018, 05:16 PM	#11
dirtbkr188 Join Date: Aug 2009 Posts: 510	Typically, you can go with .003" - intake and .004" - exhaust for these horizontal engines with a 110cc or greater displacement.
	1

04-29-2018, 11:10 PM	#13
Chinabike Join Date: Jan 2018 Posts: 361	Ok i adjust the valve to .003 / .004 main jet 120 fuel/mix 1 1/2 turns That taping is quieter but now it sounds like this. Like it has the hiccups? Cutting in and out. https://streamable.com/uj84e
	0

04-30-2018, 12:24 AM	#15
Chinabike Join Date: Jan 2018 Posts: 361	Maybe its the spark plug? I only had a old one. Just a thought.
	0