DT125R ARCHIVE

DeeTee · DTR Senior Member

Power Valve Direction, DTR 2003 v's DTRE 2007

RudiRulez · DTR Senior Member

that first vid 2007 is wrong, the guys powervalve is setup wrong, it half closed then full closed when he revs it.

the second vid 2003, the guy powervalve is setup perfect, goes from full closed to fully open when he revs.

RudiRulez · DTR Senior Member

ooooh actually, just had a thought, maybe the 2007's pv has been setup differently to combat the problem you get from having an oversized cylinder where the powervalve can hit the piston, we had a little discussion going on in a thread as to whether it was possible to have it working backwards with the powervalve twisted around to prevent it from hitting the piston.

Dickhead · Nonce

having the valve go the outher way will not lower the exhaust port just restrict flo

MisterDave · DTR Respected Member

this is the newest thread regarding the YPVS, I just bought a 97 dtr with no YPVS servo on as some pikey has just pinned it open and slammed a plate on the outside which is losing compression I have been offered a YPVS for £20 plus postage is this a good price? and is it worth purchasing?

craigbulmer · Guru

yes it is! buy it

will improve riding comfort lol

conn1987 · DTR Senior Member

MisterDave wrote:

this is the newest thread regarding the YPVS, I just bought a 97 dtr with no YPVS servo on as some pikey has just pinned it open and slammed a plate on the outside which is losing compression I have been offered a YPVS for £20 plus postage is this a good price? and is it worth purchasing?

definately worth £20 just make sure its the right one for ur bike

craigbulmer · Guru

5 pin servos are very common.

Buy it, if it doesnt fit, put it on eBay for £50 cuz 3 pin servos are rare :D

MisterDave · DTR Respected Member

:D YPVess on its way :D

craigbulmer · Guru

nice :D

Dickhead · Nonce

if its 3 pin and yoy dont use it can i have dibs on it please

satelliteone · DTR Senior Member

mines works like the second vid. thats the right way, as stated above :)

if ya over bore and leave it like that. ur in trouble, as i found out. to my exspence.

i am going to do an experiment on my bike, iam going to turn the cables around. this will move the PV anti clockwise (fowrard toward the zorst port) when idle. Then turns clockwise (fully open) at high revs.

If it works with no adverse effects on power, then it is ideal on over bored engines. happy days!

MisterDave · DTR Respected Member

Robin yea sure buddy, am just waiting for my bike in garage and the blokey to email me back about it.