DT125R ARCHIVE

Ralzy · Guru

MY S**T LOOK YESTERDAY

millsy · DTR Respected Member

well the day started well went out on the rm250 for a little while then cut out and wouldnt start again (first thought lose earth, had happened before) so go it home, took plug out to check for spark and plug was filled with water cry Â after removing head found head gasket inner o-ring has burnt threw in 2 places, only Â£10 for genuine suzuki gaskets not to bad.

I then thought its only early when not pull the dt out seeing as im in my bike gear and go green laning (DT HAD OTHER IDEAS). let it warm for 10 mins or so while putting rm away set off got to bottom of my street (mid 2nd gear) and she locked up solid.

heres the two broke

with the engine out :(

the engine (very dirty)

what i found when took head off

once it was out

so now iv ordered a new stator, full gasket set an +2.00mm piston kit an started the rebuild on my original 89 engine

Calum122 · Guru

Going to have to mod the power valve if you're going 2mm oversize mate. Check the P.valve fail thread.

MDK · DTR Legend

yeah the pv will soon eat a new over sized piston and rings

Calum122 · Guru

Make sure the head gasket is genuine. That is a must mate!

DT200R MACCA · BANNED

no need to mod the power valve just lock it open and its faster than useing a servo

ToySoldier · DTR Legend

do you under stand what a servo does Macca?

DT200R MACCA · BANNED

yea and there ****t av left loads of dts thats been useing servos and i would never use 1

ToySoldier · DTR Legend

that is just stupid there there for a reason if you pin it open it feels quicker as the pv kicks in harder but your losing bottom end power

DT200R MACCA · BANNED

u only lose a little bit but if u now how to ride a bike its nowt u just use the gearbox more and it feels quicker and is quicker

NEV · Guru

Its not faster Macca, that kick up the backside at 7000 rpm from when pinned open is fast granted, but with a servo you get the full power range from low to high revs, and coupled with a CDI that doesn't restrict at a high revs as most do, you have a right rocket mate. I promise you, you'd not leave me behind.

ToySoldier · DTR Legend

feels quicker that is it as it kicks in harder but if it was better without do you really think yamaha would of spend and invested that much money and time and include it on so many of there 2 strokes answer is no they would not and they removed them from some year bikes as restrictions.

DT200R MACCA · BANNED

NEV wrote:
Its not faster Macca, that kick up the backside at 7000 rpm from when pinned open is fast granted, but with a servo you get the full power range from low to high revs, and coupled with a CDI that doesn't restrict at a high revs as most do, you have a right rocket mate. I promise you, you'd not leave me behind.

av had a early loom and cdi unit on the bike mate and when it was running with a servo it was slow same with my bros 03 dt when he bought it he couldnt keep up as soon as i did the clock mod and took the servo off he was right behind me. i think the only time a servo would come in handy is on twisty roads but theres no chance a dt thats useing a servo would be faster than a 1 thats pinned open

NEV · Guru

Its a shame you live the other side of the country to me Macca, proof of the pudding and all that. I had to have mine pinned when I first had my engine done, so yes I got the warp factor at 7k revs, but where I live its pretty hilly and struggled with some of the steeper hills, but when I connected the servo back up it pretty much took those same hills effortlessly.

DT200R MACCA · BANNED

yea i know ha . see where i live its mostly flat no hills. up hear no 1 uses servos ud be lucky to see 5 out of 100

ToySoldier · DTR Legend

all the people up your way are idiotic then. the reason your bros became fast is not the servo its you did the clock mod witch derestrict'd it

CarlosRexx · Guru

It feels quicker with no servo cos the impact is more prominent from the band. With a servo you get the same power it's just tame and alll through the range. I took my servo off and I loved it but now I hate it and want it back on.

On topic though, what did that damage? clipping a port?

MDK · DTR Legend

servo user all the way ..

totaly hate the lock the pv wide open its faster kind of mentalty . in my mind only tards remove the servo and lock the valve wide open

lock pv init weelies in every gear init fast as fck init band in every gear init do.s 130 mph now init bruv .

eG x LoGiKzZ · Guru

have to say my re was faster with the pv pinned, and i know it was. stretched my chain like **** tho lol

CarlosRexx · Guru

My cable was knackered on one side of the valve so I kinda had to until I got a new one, Never got round to getting one cos I loved the kick from the band but now it's impractical and I lose alot of 6th gear. I have to keep dropping a gear to get anywhere if I drop out of the band, proper sucks

millsy · DTR Respected Member

no damage to barrel atall very strange concidering the state of the piston and as for the valve hitting piston ect the barrel that im using is already set for +2.00 over as thats was was using before stator went on 89 engine

Boxing · Guru

Calum122 wrote:
Going to have to mod the power valve if you're going 2mm oversize mate. Check the P.valve fail thread.

Could you link me to this thread? I can't find it.

Cheers.

ToySoldier · DTR Legend

ok this is a **** diagram i know but try and under stand this if its closed the cirle is wear the band is most powerful and in the open circle is for top end like you have if you have a servo it adjusts so its best of both still the same top as it can only be open so much why would you want to restrict what has been made for power its stupidity

millsy · DTR Respected Member

http://dt125r.activeboard.com/t34662185/pvalve-fail/

tunertom · DTR Senior Member

you think its faster without the servo because it FEELS faster because of the rush of acceleration..

with the servo OFF, the power you get is nothing...nothing.......nothing......... BANG power.

with the servo on, you get a steady build up of power and the SAME amount of power in the band, it just feels slower with the servo fitted because there is no BANG or 'hit' as some like to call it

if the servo reduced power in any way at all i dont think the italian belgarda, full power bikes would have them ey?

-- Edited by tunertom on Tuesday 19th of March 2013 12:32:16 AM

DT200R MACCA · BANNED

ToySoldier wrote:
all the people up your way are idiotic then. the reason your bros became fast is not the servo its you did the clock mod witch derestrict'd it

i tryed the clock mod 1st and it was still a pill so thats a load of ****t. it was down to the servo it just wouldnt rev as quick

millsy · DTR Respected Member

I agree with you macca prefer pined to having a servo

ToySoldier · DTR Legend

Mines doing it at the moment but they gum up witch makes it turn slower common problem on rs's they gum up and grt stuck just pull it out and cleanit oncw in a wile and your sortes

stillbroke · Guru

agree with macca and i tell you now my bike kicks in well before 7k and seems to continue doing it if anything i have more bottom end

NEV · Guru

Standard sprockets?