Hi there i recently had an engine rebuild and the mechanic adjusted my power valve so its not as quick as it used to be ive done well over 700 miles and want to turn it back up so its at optimal performance. Now it hits the power valve it kind of wants to go abit more but is being restricted.
using the 1 and 2 adjustment screws how should i adjust them so i can get the best performance ???
thanks m8 yeah that was simple enough,,, one other thing playin on my mind is when you use a servo system the engine sounds completly different the only way i can explain it is. It sounds like piston failure it sounds a bit clickity or is that supposed to sound that way i suppose the powervales constantly spooling up on a servo an with a pegged valve it used to make a little clickity noise before pv kicked off
Hmm, this dont sound right. I've got a barrel here where someone didnt fit the pv correctly and the piston rubbed away at it and didnt do itself any good at all. There shouldn't be the noise you descibe at all!! I suppose you havent had it bored out to a big oversize that means the piston is hitting the pv? I suggest you check that the pv isnt in upside down or something like that.
yeah its all in the right way . cant be down to the cable adjustment can it,,
its only a minor clicking sound from the engine just like the whiring sound before the pv kicked in on a pegged open system but constantly an at its worst about 5000rpm.
As far as the bike runnin right an servo working correctly it all feels ok.. Im still not sure which i like the most though. my bike feels like a tamed beast now ,, servo pv is good in a town but most of my riding is on twisty country roads where i think a pegged valve is the way to go..
http://www.youtube.com/watch?v=c9MSTB2jjUM
just an upload to show what i mean about the engine sounding different when running a servo system check my older onboard for a comparison
youl av to hunt out the bits without the wind ruining it soz as for the bad riding i was paying to much attention to the clickity noises from the engine not sure if its norm with a servo iv always had it pegged open
-- Edited by tripr on Friday 14th of October 2011 10:41:48 AM
-- Edited by tripr on Friday 14th of October 2011 10:50:21 AM
Difficult to tell from the video sound. I suggest you disconnect the servo cables or remove the centre bolt holding the pulley to the valve and then turn the valve by hand to see if the sound goes away or changes. if it goes away then there is some adjustment needed.
yeah sorry m8 it wasnt the best quality was it. iv been through loadsa previous post lookin on this an im still confused
iv done as you said with the powervalve the noise seems to go away as soon as i use the engine without the servo,, then it kinda changes exhast note completly if i do use the servo i get that slight clickity back
i have noticed the little notch doesnt line up its about 3mm to the right of it when the valve is fully flush up the exhaust port .
and the servo moves in reverse anticlockwise closing the port at piston edge of the p/v off instead of closing off the the exhuast port edge of the valve
i tried swapping the cables over but it just turned back to having a boost at 5k as if pegged no midrange
when i pegged mine i always turned it anticlockwise to shut it off a bit clockwise to max it out
Hmm, I thought turning it anticlockwise (when viewed from the left hand side) would open the pv to its max height, turning it clockwise lowers the port for low revs? I can only suggest from what you have just described that the pv is either out of alignment or is very worn as when you use the servo the clicking returns. Can you feel any up and down movement or is there any endfloat in the pv?
Sorry i forgot to explain that im not turning the servo clockwise or anticlockwise im turning the valves diamond shaped bolt
yeah it does open this way an the bike reacts as it should power right through
but as the engines reved it opens the valve by raising the piston edge of the p/v blade instead of the exhaust port edge it just doesnt seem right to me. it leaves a big ledge for the exhaust gasses to pass
powervalve all turns freely by hand when disconected with no freeplay it shouldnt hit as this barrels a standard bore too
what do you mean by endfloat aswell please m8
-- Edited by tripr on Monday 17th of October 2011 09:05:12 PM
