DT125R ARCHIVE

steve0200 · DTR Respected Member

i pinned my powervalve open but no bands?no different from useing the servo?

plebpl · Guru

you sure you didnt pin it shut?

steve0200 · DTR Respected Member

i took the exhaust off first and checked

DT-R_bradders · Guru

If ur pv is set up right it should perform better, when the pv is pinned open (like on mine) it has no power at the bottom up until 5 or so k then it rips hardcore , with the pv set up right u gain power at lower rpm then still get all that power at top , u should notice a difference somwer m8y

steve0200 · DTR Respected Member

no difference m8

DT-R_bradders · Guru

Somthing can't be right m8 , wen I first got my dt the pv was pinned half shut , good bottom end torque but lost all top end , as soon as I opened it up there was a massive difference , the difference could not be missed lol ,
Also have u found any fmf or any other a/m front pipes for ur bike??

steve0200 · DTR Respected Member

ive got i front pipe made by doma racing,i hav,nt tried it yet tho because it needs adjusting to fit my bike.

the only way is YAMAHA DTR · Guru

mabey the servo had been messed about with before and setup wrong broken cables or cables wrong way round

Energized · DTR Legend

Yeah that could be true, cause my servo works fine, you feel it lower down in the range then when you get into the higher range it sends a bolt of energy through you and the bike and you go into beast mode! wink

plebpl · Guru

Energized wrote:
Yeah that could be true, cause my servo works fine, you feel it lower down in the range then when you get into the higher range it sends a bolt of energy through you and the bike and you go into beast mode!

thats called nitrous ;D

Energized · DTR Legend

plebpl wrote:
thats called nitrous ;D

Oopsie, i forgot to take off my NOS setup, think i drained all my NOS bottle bah! wink

steve0200 · DTR Respected Member

the bloke i got the bike off,changed the pv cables,but ive adjusted the servo and pinned the pv open,but still no bolt of energy,powerband,kick?its got plenty of power through the gears but no kick,its the same al through the gears?i checked the air filter earlya aswell and thats fine?its had a new plug.

Jack Shuker · DTR Respected Member

hiya guys, how do i pin my power valve open? i know u disconect the plug from the survo do i then mannually spin the powervalve? if so when i turn it to open where should the cut out of the power valve b? cheers guys =)

PatMan · Guru

When I pinned my pv open I took the cables off, so they dont get in the way etc etc, by the way mate what have you pinned it open with, a long thin screw or bolt, have you checked thats the bolt or screw is still in the hole bit and havent popped out?

Jack Shuker · DTR Respected Member

i havent a clue how to pin it open.....help =) haha

steve0200 · DTR Respected Member

i disconected the cables(so the power valve turns freely), took the exhaust off,looked and felt up the port,to make sure the valve was open(the hole in the servo wheel that the cables go on and the whole on the side of the head matched up so i put a screw through them to pin it open,but it didnt make any difference for me

still no power bands.it goes exactly the same pinned open or useing the servo?

Jack Shuker · DTR Respected Member

i done it tonight, and mine goes like a rocket mate, good luck

Spartan · DTR Senior Member

Take your powervalve out steve to see if it's full of crud and give it a good clean up.

tripr · Guru

could be down to the front pipe maybe m8 . my other dt's powervalve doesnt perform well with the non standard front pipe fitted its fine again when i put the standard expansion back on ,

steve0200 · DTR Respected Member

i think my front pipe is standard,but its been repaired so many times its about ready for the bin,ive got a doma racing pipe to put on it,but it needs ultering 1st.

jayjay · DTR Senior Member

Haa yes my servo broke so garage pinned mine open and I've had a full rebuild. Il take it up to 7k every now an then an the power is like a rush. Its. But bottom end is slow as but rideable and still good for running in my new engine. I must admit that having the full rebuild is well worth it. Engine sound mint.

Calum122 · Guru

Hmmm :\ Should really be using the PV when running a new engine. You'll put tromendous strain on the engine running it in with out the assisted power!

The YPVS isn't exactly the best design. It makes much more sense to do what Aprilia has done and have a cut in/out blade or the RAVE system. Instead of the circular motion.

NORFE · DTR Trusted Engine Builder

a 22 cc hedge trimmer has a power band. and so does every engine. "power band" is a term used to describe the rpm range where the engine produces its best usable power

it makes me laff reading ebay listings where it says "its so fast it will pull ur arms out its got powerbands in every gear"

ha ha a bike will only go as fast as u make it.....

you no the person selling it knows nothing about bikes and to steer clear, if they dont no the basics then theres a possibility they dont no how to look after the bike simple as

not all engine have power valves tho this is what confuses people, most modern 2 strokes have the power valve assembly, this is in place to make the most out of the small engine varying exhaust port timing to match engine rpms

and they mae a hell ov a difference, thus why people do the servo mod on older bikes as u get a completly different engine, if theres no change to your power out put id start investigating for other causes of the lack of power

mixture,plug,air leaks,crank seals,gaskets

smile

ToySoldier · DTR Legend

what makes me laugh is when it ses iv recently replaced the powerbands hahaaha

NORFE · DTR Trusted Engine Builder

ha ha yeah proper bollox some people come out wi

Seanyftw · Guru

Anyone remember that ebay post where we all messaged him ridiculous questions about the colour of the powerbands and asking if it had them in all the gears? xD

NORFE · DTR Trusted Engine Builder

ha ha i would of loved a slice of that ha ha...shal we do a new post, "dumb ass bike seller of the week ha ha

gooner78 · Guru

I have had to ride my husky with the powevalve pinned open as the sevo was knackered and to honest i hated it and i could not find a replacment servo in this country so i ended up getting one from italian ebay for 90 euros

coastie123 · DTR Senior Member

Seanyftw wrote:
Anyone remember that ebay post where we all messaged him ridiculous questions about the colour of the powerbands and asking if it had them in all the gears? xD

If u speak nicely to the postman, they leave quite a few red ones lying about in the street, they're nice and thick so should work well!!!!!!

Cameron · Guru

Why would you want to disconnect the servo if you have one that work fine lol??