P125X Carb set up or something else?

[doctorbob]

Hello All, 

Over the last few years I have restored an 1981 P125x. It was a battery version, but its not now. Also, it was modified with a 177 polini kit, now back to stock with a 125 cylinder on it. 

Here is the idle in the video: 




The idle is uneven and there is a ticking noise. 

Carb is clean
Mixture screw is a fat end one with a course thread, moving it only seems to have an effect when its almost at the end, when it goes faster. Engine doesn't stop when the mix screw is all the way in. I looked down the inlet hole and when the screw is pushed all the way in the end protrudes quite far into the cavity. 2/3 mm maybe. 

Jets:

160/BE3/96

idle jet (i think its called) 40-120

Starter - 60

First question is whether its normal for that mix screw to be protruding so far in and having little effect until the end? If not I guess that could be my problem (or one of them). 

If it is normal, what can i do to get this running more evenly? 

Last question:  what the hell is that ticking noise?

Thanks in advance for any advice 

Bob

[alan34]

Hello there regarding ticking noise try takeing plug out and pressing kick start to turn engine over might be able to pin point without it running. could be fan catching the cover good luck with it cheers alan.

[ironsloth]

Could be fan. Does it only do it with the glovebox door open??? Could be that.

[soulboy74]

Have you gave it a good run out put some miles on it and see if it settles in better after the work you have done sounds like mine 125 before a run after sitting for a while indoors remember you have gone standard ish and that's how they sound too start off with give it a good run and see !! Best foot forward soulboy

[doctorbob]

Thanks,

I've bought some bits and pieces to make a leak test, new plugs and some exhaust paste. While I'm waiting I thought I would take the head off.

Spark plug was black and wet, same as the top of piston. I guess that's a sign of being rich?

I keep yo posted
Chief