kris john

thanks for your info lads. i brought a cdi for my model an year [1990] for £1.20p off ebay just in case mine is faulty at that price it was worth the risk. im still waiting for the ignition coil so when they come at least i can c if that is the prob or not. mean time i will buy some bits an bobs for a servo off ebay. what year would i need? a 1995 tzr for the loom i might get a dt barrel as i will need one that should work enit? or is it best to stick to tzr everythink.

lol. i was going to lookin to a servo a bit more but i ended up lookin in to the cdi because the yamaha tzr125 has two sourse coil. cuz ive got a new ignition coil [spark plug part] so wen i found out about the cdi is part of the ignition system it got me thinking my cdi could be at fault but the only way to find out for sure is to buy a new or used cdi used one is much better cuz new they cost doe. but if i get a used one must make sure it works. then theres the cdi control box i can do a test on that [thats the easy bit]. now back to the pv if i need to fit the servo an at most i would need is cdi an loom [or new barral but not sure yet]an the servo its self an pv cables. 2 birds with one stone if my cdi is faulty cuz i would or think i would need to change cdi anyway if i go down the servo rote. i have taken off my exhaust an i cant really tell if the pv is open or closed but a can seen my pistion an i can feel the valve so it sounds like its open? so do you think i should go down the cdi rote 1st dont think it would do any harm i can get a used cdi £30 an he says it works an he seems ok but wen i told him about no power till 7000revs he talked about power valve he did or dose want £45 for it but he sed he would take £30 so he sed the same about some people pin open the pv for more power but you lose power low revs. but my m8 tells me its the cdi or the spark plug coil. so not sure on wot way to go first£ so wen the spark plug coil comes i could fit it test it if its still the same then do a check on cdi control box an then if its not the control box.an then cdi or pv ?

ok thanks. i will lookin to it a bit more about fittin a servo. sounds like the best option but only if i need to. your info as bin helpfull an i understand that you are not a trained machanic i will use info at my on risk an do not hold you or anyone else responsible.

hi ok thats birll so i dont need to take the head an barrel off then i thought i would of. i got a manaul comeing so i should be ok if i need to put it back as standard. ok i will be busy the weekend i will put a new post on next week. just 1 thing be for i go [servo] will i need to change the barrel or just the loom at most? my manuals just come oh an thank you again for your info at least now i understand it all a bit better

yeah thanx that well be great nice one

hi thanks for replying yeah thats right 7000 an then its like a rockit i dont no if its got 1 of them wats on that vid so wat could i do just set the power valve cuz it needs alot of work allready if u no wat i mean so the simple way is better 4 me lol is it wat my m8 done wen he done the head an barrel

hi this my first post an my first yamaha tzr 125. well the problem is wen i ride the bike its got no power till 7000 revs an then the power will kick in. i find my self holdin in the clutch till 7000 revs an then lettin it out to get power [only done it a few times no more than 5]only had the bike 1 week to this date 17/03\10 ride it once. so can any one help or give me some info i think its got some thing to do with the power valve [correct me if im rong] i think its stayin open or something my m8 who i got it off has had the head an barrel skimed an new pistion an rings be for i got it an i think thats wen the prob started. its a 1990 model any help i will be very greatfull thank you kris