sound from the bike!

[McOrange]

my 3yrs old super4 spec3 got ''dic dic..... '' sound come out when bike is cold! (nt becos of the exhaust pipe expand )

[Pandoras Kitten 3]

Would you care to describe more?

 

Ticking from exhaust pipe cooling usually exists after turning OFF the engine.

 

Can put your ear close to the engine and listen where exactly the sound originates from; is it on the top of the engine? (cam lifter height, cam tensioner/chain issue, or starting with lean mixture - tune carb idle jet)

 

Piston? (combustion knock, like diesel taxi)

[McOrange]

I'll try to locate the sound ,

but it comes out onli when engin cold, sound gone after warming up,

just wanna knw anyone here encounter this problem. Thanks anyway

[xXxRatedxXx]

Your clutch basket loose already.... its starting to rattle... one possibility....

[Raptor]

When was the last time you did a valve clearance check?

 

What you are hearing is probably valve chatter due to excessive clearance between the valve and cam.

 

When the engine is hot.. the valve stem and camshaft expands and the clearance become smaller and the sound reduces... its not gone.. its just softer.

[McOrange]

Oh, wad u mean my bike is time to go hospitialiZe.

[Terrible One]

Sounds like valve clearence issue to me

[xgstx]

Experiencing the same situation as u, the ticking comes from the left side of the engine when its cold right? its probably valve clearance, high chance .

[Infernalwar]

Your bike got time-bomb... Okay i know it's lame... Hahahaha!

[Pandoras Kitten 3]

Valve clearance severity?

 

Check out this article

 

http://www.tuning.wanadoo.co.uk/valve-clearances.htm

 

I'm keeping my diesel taxi settings

[McOrange]

thanks for all reply,

any idea which shop do valve clearance gd?

[duracell]

thanks for all reply,

any idea which shop do valve clearance gd?

local agent; boon siew

[Pandoras Kitten 3]

I'd just randomly visit the Ubi shops until I get a satisfactory diagnosis.

 

If shop says OMG must overhaul $500!!!! then you know if someone's trying to make a buck off you.

 

DIY mechanic power ftw

[ssdc regular]

it is valve clearence... my mech told me nvm de... cos if i go do the clearence den bike will become slower le...

[Pandoras Kitten 3]

Yep, see link above in my post. Increasing valve clearance means a bit more power at the expense of noise when cold.

 

When warm the valves expand and you get "normal" clearance. Too low a valve clearance and you risk piston ramming the valves at TDC (top dead centre) which is BAD.

 

So long as it doesn't sound like Comfort Taxi, you're fine. As again it's great you are taking precautions and listening closely to your bike!

[Terrible One]

it is valve clearence... my mech told me nvm de... cos if i go do the clearence den bike will become slower le...

 

I think ur mech is just lazy. The valve clearence need to be within specs