DT125R ARCHIVE

DTR-POWERVALVE-FTW · DTR Respected Member

95 dt125r....few slight mods would like to no next step :D

Energized · DTR Legend

Keep as you are tbh, unless you wanna blow big money.

Big bore kits;

Athena 170

German "Athena killer"180 <- (best to get imo)

You could swap out your head for a 3mb higher compression head unless you already have this head fitted.

Polish/minor port work....Polish the head/piston crown etc,etc....everything you need is on here mate just search the forum.

Carb wise i'd stick with anything from 30-34mm if you want to do that.

Vforce 3 reeds, talk to the only way is yamaha about that.

Cut open the airbox, remove snorkle....yeah i cba to write anymore i'm pretty much just repeating what has been stated 100 times before in older threads anyway.

the only way is YAMAHA DTR · Guru

how much do you want to spend on the enginr

DTR-POWERVALVE-FTW · DTR Respected Member

i cant respect that dude bet its repetative lol....erm if im honest i have a yz250 works engine in garage...aslong as im careful....i might risk that....but my risks have lost me my licence whats the honest top speed of a standard modified dt125r like myn...as i havent took her out yet properly...:/

the only way is YAMAHA DTR · Guru

average 80-85mph,

but if you want the engine tuned without you doing the work email this company http://www.stanstephens.com/index.html

the were around when my dad was a kid lol

go for a stage 3,

mr karnage · Guru

id tell you would be sick

and im still considering doing it

get a 3mb head

skim it alot

re profile the squish to sp spec

same compression as the sp head

send the head off to get machined to take o rings

NEV · Guru

Thats what Cornish Motorcycles did for mine Karny, runs well with the TZR piston.

DTR-POWERVALVE-FTW · DTR Respected Member

i live in bury st edmunds tho but i would like a stage 3 lump for fun....thing to do is ride it around as it is for few months thn try get the works tuned yz250 lump i have in her ....all the rs125sround here would have a heart attack ;)

mr karnage · Guru

NEV wrote:
Thats what Cornish Motorcycles did for mine Karny, runs well with the TZR piston.

the tzr is a flat piston isnt it

youd get a higher comp with a dt piston its domed, or would it it the squish

the 4dl engines use domed piston and im sure the sp does aswell

Seiki · Admin

the only way is YAMAHA DTR wrote:
average 80-85mph,
but if you want the engine tuned without you doing the work email this company http://www.stanstephens.com/index.html
the were around when my dad was a kid lol
go for a stage 3,

Not anymore apparently, heard a few things about them since Stan retired. No personal experience though I deal with Bob Farnham.

If you have the money i'd buy that 200R engine if I were you. It will save you alot of time and get you better results

NEV · Guru

mr karnage wrote:
NEV wrote:
Thats what Cornish Motorcycles did for mine Karny, runs well with the TZR piston.
the tzr is a flat piston isnt it
youd get a higher comp with a dt piston its domed, or would it it the squish
the 4dl engines use domed piston and im sure the sp does aswell

The TZR piston I had put in is for an early model TZR and is domed, exactly the same as the old RD pistons, except that the RD pistons have the windows,

mr karnage · Guru

oh right, same as the dt then

NEV · Guru

nope lol higher crown, you'd need to ask Dave at roadanddirtbike.com, he supplied it for me. otherwise I would have bought the DT piston,as I was looking at putting in either a Wiseco, or a Wossner piston, he put me onto the TZR piston, I took his word for it as he builds race engines.

mr karnage · Guru

oh yh, bet thats got loads of compression

has it made a big difference?

-- Edited by mr karnage on Sunday 25th of March 2012 09:37:49 PM

NEV · Guru

Well bearing in mind I'm still running it in, but I let my mate who has a tricked up R6, have a go on it last week, and he was impressed, as for whether or not its made a difference, to be honest I couldn't tell you, as when I first bought it and before the strip down I could only take it for a short blast, as plod came up behind me telling me it was a bit loud to be tearing up and down on it at that time of night, pulling power though I'm impressed, as I'm a gnats **** off 6'5" and 20 .5 stone and it pulls away with me on it no probs, and my lad who's about 11 stone wet through, reckons its the fastest 125 he's been on. When it's been run in I'm after putting it on a dyno, just to see what its got.

mr karnage · Guru

keep us updated man

ToySoldier · DTR Legend

id i had money i would buy a bigger bike and keep my dt in a nice clean garrage