DT125R ARCHIVE

steve0200 · DTR Respected Member

anyone know the restrictions on a 1999 dtr

ToySoldier · DTR Legend

bit confused mate if u pin the powervalve open u wont need a servo and if u have a servo u cant pin it open as the powervalve moves with the revs

steve0200 · DTR Respected Member

i disconected the servo and pinned the power valve open,but nothing,so i re set up the servo and still no powerbands,no kick,no boost,wham?the bike does about 75mph its got a 13 tooth sproket on the front and 45 tooth on the back,it goes ok,but i got the bike for the power bands, i wanted that extra kick for a bit of fun,but its just not there.ive had a compression test and its all fine?

ToySoldier · DTR Legend

75 isent bad outa it as there not made for speed but woth powervalve pinned open there wound be a powerband and when u turn the bike on can u hear the zii zii sound lol and try takeing the cover off the powervalve houseing and check that it turns when u rev it to around 6 or 7 thousand revs

steve0200 · DTR Respected Member

yes m8 it turns when i rev it, and it turns when i turn the ignition on,its all workin as it should,thats why im wondering if it could be the carb or reeds?

bkray · DTR Senior Member

erm, not gonna lie, i dont notice my powerband, got exactly the same set up apart from sprockets but, only get about 75. i can notice it... just barely. :/ kicks in about 6k revs for me. if you rev it high, and change gear, then sometimes you dont get the burst of power. because it stays open.

ToySoldier · DTR Legend

i dont see what is wrong with it 75 isent bad for it and if its turning it means its working

bkray · DTR Senior Member

yeah, im not complaining. :D its a 125, cant expect superbike performance. :P (we all wish though)

steve0200 · DTR Respected Member

when i change gear in hi revs it doesnt lose much if any power,it goes through the gears quite quick,but i put that down to havin a 13 tooth sprocket on the front,when i build up speed in each gear there is no kick,i was hoping it would be a bit like a yz or kx(obviously not as much power)just not enough power?

steve0200 · DTR Respected Member

about 10 years ago my m8 had a kmx,and another had a dtr and they had power bands and quite a kick.thats what i was hopeing for.

Energized · DTR Legend

I was going to suggest sprockets, but i'm running acceleration setup with my sprockets and it pulls like a train through the gears once i get between 6-7k reveries, top end is less obviously but it is rather rapid and ravenous, which i'm liking for now until i get my new standard sprockets for top end comparisons! wink wink smile

PatMan · Guru

Check that the powervalve is the right way round could of been put in upside down

steve0200 · DTR Respected Member

how do i know if its upside down or not?i had a go on my m8,s 1995 dtr yesterday and compared to mine it was a beast,my bike goes like the powervalve is closed,ive got no powerband what so ever,,ive turned it, ive pinned it open,ive adjusted the the servo,still nothin,could it be the reeds or carb?

midnightbikerjames · DTR Senior Member

you keep saying the reeds or carb mate but i doubt it, if your mate has a dt swap the carb and reeds over and see if it makes a difference if you really beleive thats whats up with it

steve0200 · DTR Respected Member

im asking if it could be them?because thats what someone said to me,i hav,nt got a clue what it is,i dont want to take them out if theres no chance it could be them?i keep askin because no one has said if they could be the problem or not?

steve0200 · DTR Respected Member

plus my m8,s is a 1995 and mine is a1999,i think they a different(dont hold me to that tho m8)if you dont think its them any other idears m8?

midnightbikerjames · DTR Senior Member

do what patman said, turn the powervalve round and see if it makes any difference.
na doubt its the reeds or carb mate

steve0200 · DTR Respected Member

ive tried turnin the valve 180?

GADGET · Guru

hi there mate

what does the bike rev to

?

steve0200 · DTR Respected Member

it doesnt have a rev counter m8,it sounds like it revs quite high,i think it revs higher than my m8,s pegged open dt.

GADGET · Guru

have you looked up the exhaust port ?????

GADGET · Guru

for setting the ex valve ?

take the exhaust off and look up there towards the piston

then take off valve cover and adjust valve again until roof of exhaust port is flush and open fully