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i know it,s wrong
Posted: Mon Jun 25, 2007 3:14 pm
by rockerted
can anyone tell me how to deristrict a 125 tzr yam??
Posted: Mon Jun 25, 2007 5:06 pm
by mr_bungholeo
check for a washer in the exhaust header held in with three spot welds...n turn the powervalve round so it opens up the exhaust fully(while the pipes off)...
f you have a motor on the powervalve...take out the bit of metal that looks like a top hat(as this only lets the pv open1/4 to 3/4)once done it should open from half to full...
switch on the ignition till it sweeps open then quickly turn the ignition off.....look up the exhaust port n c if the valve is flush ...well it should have a 1mm lip at the front...if your still stuck pm me your phone number n ill talk you through it...
Posted: Mon Jun 25, 2007 9:29 pm
by Cliff
Blimey Ted, you found one that is still restricted
! A good bike, even though i never even rode one, but i did ride the 125 lc
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Posted: Mon Jun 25, 2007 10:11 pm
by rockerted
cheers, but we think it might just be the carb!! my son put it together, it,s his first bike!!
Posted: Tue Jun 26, 2007 7:08 am
by mr_bungholeo
thought you had the only unmolested 125 in the uk....most have been raped by youfs by now(like we all did...
)
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Posted: Tue Jun 26, 2007 3:41 pm
by rockerted
only thing is, my 1st exp of 2/strokes was a francis barnett 225cc, my 1st bike, various twins, ambassedor ss, moto guzzi zigolo , which i think was a 110cc, and a few scramblers (as they were called then) greeves mcs, and the 100th greeves silverstone made!! wish i had the buggers now, but thanks for your ideas..
Posted: Tue Jun 26, 2007 6:07 pm
by mr_bungholeo
i once rode a dt125 to germany for a 10 quid bet......rode to weizbaden...780 miles each way.......
blew the crank seal on the way back n had to restrict it for the LOOOOOONNNG trip home...
i won the bet.....
Posted: Fri Jun 29, 2007 9:48 pm
by KR1 Man
KR1 Man calling. Another old 'stroker days' tale of yore! 1983, I had a MK1 DT125LC that was restricted and rode exactly the same as all the others, until........... I took out the restricting washer, found spot welds and cut the exhaust open in about 3 places, removed all baffle plates and brazed it all back up together, next we did the tailpipe. Put the whole lot back together and fired her up, WOW!!! Sounded more like a YZ125 than a DT125LC!!!!!!! Plenty of playing around with jetting &c, but once right, RD sprocket set and let's go chasing RD 125LCs'! Next came an X7 carb bored up to 34mm and a little bit more gained! Did'nt do anything else to it but great fun to ride until some FxxKwit nicked it about 3 months later.