i know this is of my old posts but its really starting to bother me. sounds like a wrist pin bearing or maybe in the bottom end, cant figure it out, but im going to adjust ,my valves tomorrow i dont seem to have my card what is the adjustments for a stage 2 hotcams,

i really dont like the way it sounds kinda bothers me, i put a heavyer oil in it to help with the clutch (didnt want it to slip) could that be it also?

-adust valves
-recomended oil
-a bearing of some kind
-?????andy suggestions????

i really dont want this thing going south on me so please if you any more idead's please let me know.
Thanks

 

Probalby just valve noise from poor adjustment and not locking them down. But if you used a stage 2 cam and didn't check the clearances you may have missed a middle intake valve guide issue and/or bent a valve.

 

from that spoon sound.. it seems like u just have to let the oil circulate in the engine.. sounds like when u start it it is metal on metal and the oil has to run thru the system. Thats my best guess.

 

Hello Austin, Long time...

I think what you may be experiencing is delayed ignition due to high octane and a cold cylinder. As those of you with modified engines on here know, high octane fuel (containing fewer radicals) burns smoother and slower (in cold conditions) than lower octane fuel. Often what results from a modified engine is a small delay in burn time of high octane distillates in a cold cylinder meaning that the combustion can still be occuring as the exhaust cycle begins allowing a small burst of combustion to escape through the exhaust valves and "ping" against your headers. This is a very common phenomena in modified engines and can be easily identified by kneeling beside your headers upon starting the bike to see if indeed that is where the sound is resonating from.

Happy Riding All

~HoundDog

 

well maybe i dont think its a bent valve b/c it runs GREAT, but is there any way to prevent this from happening hounddog? again i dont know the setting specs.

 

valve clearence specs from the manual:


While cold
intake: 0.10 ~ 0.15 mm (0.0039 ~ 0.0059 in)

exhuast: 0.15 ~ 0.20 mm (0.0059 ~0.0079 in)