DT125R ARCHIVE

midnightbikerjames · midnightbikerjames

hello there, I am wondering what would be the best thing to do about my power valve, i use it to go to college and alot of offroading (green laning) so what would be the best thing to do, fully open it ? get a ypvs setup or keep it closed ?

kevin · kevin

Hi guys, my clutch has been slipping lately and as it was a nice day thought I'd change the plates. Removed to side case and went to undo the lock nut on the pushrod only to find that the previous owner had snapped the screwdriver slot that you use to hold and stop the pushrod from spinning. Now I'm stuck as t...

MARTIN RD125LC · MARTIN RD125LC

Hi, i have a rd125lc mk1 (1983) not ypvs and is pretty fast as it is (will do 75-85) but will not rev out to red line, am told this is a rev restrictor which is restricted by the cdi. Does anyone know where all the restrictors are please?...Thanks.. Martin

Sgt-syphilis · Sgt-syphilis

Hi all...er so cleaned my bike today for a few hours and got it looking lovely but as I was taking off the panels ready to clean it all, I thought I better check my coolant whilst I was there...looked inside the bottle and the coolant is dirty :( there is stuff floating in it. Looks brown like mud or silt fro...

martyna · martyna

Hey guys, I'm new here, so I want to ask about fuel consumption. Does the bike use much more fuel? I'm interested in de-restricting it, but I want to know if I will be able to afford it if fuel consumption is twice as it was. Started new topic as I didn't get an answer in the old one.

dt_powerd_senda · dt_powerd_senda

hey all done alot of engine work before on previous bikes such as scooters and geared am6 engines just started on a dt125r engine by raising the ports by a few mm whats your opinions and no it wont be a bodge job lol done plenty before :)

gooner78 · gooner78

As title says i,ve noticed that when the power valve is at rest its flush in the exhuast port but when its in the open position its actually closing in the exhuast port is this a restriction if so how do you sort it thanks

shanedtr · shanedtr

Ive got a 02 dtr 125. I have read the info on this site about de-restricting them, ive got a full big one race pipe, removed the rev restriction, but can only get 65 at a push. It has a induction type sound at the end of each gear... Im pritty good with bikes, so got all the tools etc to mess with it but... How can...

zo0op · zo0op

bought full 2stroke set as was premix when i bought the bike, just wondering wich pipe goes where im not daft i just dont want to mix them up and **** it ,,, cheers guys

Spartan · Spartan

Hey guys, i've been away for a while and haven't used me bike for a while either. I want to give my DT a major service like they would do at a garage but i'm not 100% sure on what a garage would do or what's classed as a major service, I hope this doesn't sound daft. I did a top end re-build myself about 3 months ag...

Dingle001 · Dingle001

http://www.smellofdeath.com/lloydy/piston_diag_guide.htm

dt_powerd_senda · dt_powerd_senda

hey all been lookin at a few fly wheels on ebay on i noticed there is 2 different flywheels any 1 know if any power difference with either of them this is mine in the pic

dt_powerd_senda · dt_powerd_senda

hey all had my power valve pinned open was crap on bottom end and good on top so took the exhaust off and looked up just to check at it was full open so i decided to turn the power valve quater of a turn so u could see the valve hanging oer the port results were far better better bottom end but stil got the full top...

dt_powerd_senda · dt_powerd_senda

hey all any 1 know ho to make the powerband kick in quicker by changing stuff ??? or modding stuff

Ben2o1o · Ben2o1o

hi everybody im new to dtrs so dont really know much i bought a 2003 dt 125 r with the power valve not working so i bought new cables and alligned the curved edge of the powervalve with the top of the exhaust port it works at high revs but i lack power in low range what could this be please help very sluggish at s...

Monkey · Monkey

Hi, all put the dt back together now, she looks stunning with a kawasaki green frame and white plastics, but i still have a problem with the head gasket blowing, i rebuilt the engine and had it running but very roughly, took it apart and the head gasket had gone, put it back together this time with head gas...

gazzaballs · gazzaballs

any sugestions wa i can do 2 make my bike faster ?thanx

dt_powerd_senda · dt_powerd_senda

hey can any 1 help me am rebuilding my engine and i want to change my piston could any 1 advise me on which is the best one to get ??

louisBOSS · louisBOSS

Ored a piston , got it had it a few weeks , took to me local mechainc as it was in the same bag as other bits i needed doing, then he go thats a rd125 piston , my rebore been match to the piston 58.00 2.00 os. It has ports, he knows so much and said it will be ok , if anything maybe faster, it said rd ect ect dt , but as i...

dt_powerd_senda · dt_powerd_senda

hey all got a dt125 bogging on take off but if choke is on works perfect it only bogs when choke is off and only when ure setting off but if u put choke on runs perfect no bogging any ideas ??

Monkey · Monkey

Hi all, i've got a 1990 dtr 125 and runs ok at low revs but at half throttle is running really rough and spluttering,does anyone know what could cause this? cheers

leebo · leebo

right lads i recently got a 2000 yam dtr 125 which had been rebord to a 175 not so long back before i got it. i had been givng it abit of stick for 5 days running and giving it all the check overs before going out on it the basics realy then today i let bike warm up for ten mins by just going round track at a stedy p...

zo0op · zo0op

i know that a 2006 barrel will bolt on and fit my 89 bottom end just want to know if the exhaust ports are the same will my expansion chamber bolt on as it normally would?? cheers

JORDAN-43 · JORDAN-43

well my bike cut out now wont start, has a very weak spark. changed the coil and still no luck. if i leave if for about an hour it will start up for about 10secs but runs really rough and will cut out again. anyone no whats going on

fuggie · fuggie

getting a major bog/splutter where my power band should be, been trying jetting now starting to think it may be the reeds, anyone else had knackered reeds? did you find lower revs to be fine just dieing when reving higher? that or its a electrial problem, just trying to eliminate all mechanical probs f...

Sub Forum	Topics	Posts	Last Post
Coolant System - Read Only Sub-forums: FAQ (Coolant System)	22	273	Aug 31, 2015 by AndyYam
De-Restricting - Read Only	18	345	Apr 1, 2014 by Victor
Athena - Read Only	13	184	Sep 26, 2014 by Calum122
2t Oil - Read Only	18	167	Oct 14, 2014 by MDK

Topic		Started By	Replies	Views	Last Post
	power valve (Preview) hello there, I am wondering what would be the best thing to do about my power valve, i use it to go to college and alot of offroading (green laning) so what would be the best thing to do, fully open it ? get a ypvs setup or keep it closed ?	midnightbikerjames	1	303	Jan 16, 2011 by craigbulmer
	Clutch pushrod (Preview) Hi guys, my clutch has been slipping lately and as it was a nice day thought I'd change the plates. Removed to side case and went to undo the lock nut on the pushrod only to find that the previous owner had snapped the screwdriver slot that you use to hold and stop the pushrod from spinning. Now I'm stuck as t...	kevin	16	403	Jan 16, 2011 by kevin
	RD125LC - 12A - WHERE ARE THE RESTRICTIONS PLEASE? (Preview) Hi, i have a rd125lc mk1 (1983) not ypvs and is pretty fast as it is (will do 75-85) but will not rev out to red line, am told this is a rev restrictor which is restricted by the cdi. Does anyone know where all the restrictors are please?...Thanks.. Martin	MARTIN RD125LC	3	472	Jan 14, 2011 by dt_powerd_senda
	Potential problem... (Preview) Hi all...er so cleaned my bike today for a few hours and got it looking lovely but as I was taking off the panels ready to clean it all, I thought I better check my coolant whilst I was there...looked inside the bottle and the coolant is dirty :( there is stuff floating in it. Looks brown like mud or silt fro...	Sgt-syphilis	7	318	Jan 9, 2011 by Dickhead
	DT125X Exhaust pipe de-restriction question (Preview) Hey guys, I'm new here, so I want to ask about fuel consumption. Does the bike use much more fuel? I'm interested in de-restricting it, but I want to know if I will be able to afford it if fuel consumption is twice as it was. Started new topic as I didn't get an answer in the old one.	martyna	9	407	Jan 9, 2011 by Dickhead
	raising the ports on dt125 cylinder?? (Preview) hey all done alot of engine work before on previous bikes such as scooters and geared am6 engines just started on a dt125r engine by raising the ports by a few mm whats your opinions and no it wont be a bodge job lol done plenty before :)	dt_powerd_senda	3	1292	Jan 9, 2011 by dt_powerd_senda
	power valve working in reverse (Preview) As title says i,ve noticed that when the power valve is at rest its flush in the exhuast port but when its in the open position its actually closing in the exhuast port is this a restriction if so how do you sort it thanks	gooner78	19	577	Jan 9, 2011 by Dickhead
	2002 DTR DE-RESTRICTION HELP (Preview) Ive got a 02 dtr 125. I have read the info on this site about de-restricting them, ive got a full big one race pipe, removed the rev restriction, but can only get 65 at a push. It has a induction type sound at the end of each gear... Im pritty good with bikes, so got all the tools etc to mess with it but... How can...	shanedtr	26	736	Jan 8, 2011 by Dickhead
	oil lines (Preview) bought full 2stroke set as was premix when i bought the bike, just wondering wich pipe goes where im not daft i just dont want to mix them up and **** it ,,, cheers guys	zo0op	12	358	Jan 7, 2011 by Dingle001
	Servicing (Preview) Hey guys, i've been away for a while and haven't used me bike for a while either. I want to give my DT a major service like they would do at a garage but i'm not 100% sure on what a garage would do or what's classed as a major service, I hope this doesn't sound daft. I did a top end re-build myself about 3 months ag...	Spartan	3	297	Jan 7, 2011 by Spartan
	Seizures (Preview) http://www.smellofdeath.com/lloydy/piston_diag_guide.htm	Dingle001	1	246	Jan 7, 2011 by zo0op
	yamaha dt125r flywheel ??? (Preview) hey all been lookin at a few fly wheels on ebay on i noticed there is 2 different flywheels any 1 know if any power difference with either of them this is mine in the pic	dt_powerd_senda	10	358	Jan 6, 2011 by dt_powerd_senda
	strange power valve (Preview) hey all had my power valve pinned open was crap on bottom end and good on top so took the exhaust off and looked up just to check at it was full open so i decided to turn the power valve quater of a turn so u could see the valve hanging oer the port results were far better better bottom end but stil got the full top...	dt_powerd_senda	7	487	Jan 1, 2011 by zo0op
	powerband (Preview) hey all any 1 know ho to make the powerband kick in quicker by changing stuff ??? or modding stuff	dt_powerd_senda	8	377	Jan 1, 2011 by dt_powerd_senda
	power valve (ypvs) problem (Preview) hi everybody im new to dtrs so dont really know much i bought a 2003 dt 125 r with the power valve not working so i bought new cables and alligned the curved edge of the powervalve with the top of the exhaust port it works at high revs but i lack power in low range what could this be please help very sluggish at s...	Ben2o1o	6	673	Dec 28, 2010 by Spartan
	Head skim (Preview) Hi, all put the dt back together now, she looks stunning with a kawasaki green frame and white plastics, but i still have a problem with the head gasket blowing, i rebuilt the engine and had it running but very roughly, took it apart and the head gasket had gone, put it back together this time with head gas...	Monkey	7	343	Dec 21, 2010 by DTR NESTOR
	what can i do 2 make my bike faster ( 1 2 ) (Preview) any sugestions wa i can do 2 make my bike faster ?thanx	gazzaballs	37	1586	Dec 20, 2010 by Dingle001
	which is the best piston for dt125r (Preview) hey can any 1 help me am rebuilding my engine and i want to change my piston could any 1 advise me on which is the best one to get ??	dt_powerd_senda	12	599	Dec 17, 2010 by dt_powerd_senda
	piston (Preview) Ored a piston , got it had it a few weeks , took to me local mechainc as it was in the same bag as other bits i needed doing, then he go thats a rd125 piston , my rebore been match to the piston 58.00 2.00 os. It has ports, he knows so much and said it will be ok , if anything maybe faster, it said rd ect ect dt , but as i...	louisBOSS	5	288	Dec 17, 2010 by louisBOSS
	dt125 bogging on take off but if choke is on works perfect (Preview) hey all got a dt125 bogging on take off but if choke is on works perfect it only bogs when choke is off and only when ure setting off but if u put choke on runs perfect no bogging any ideas ??	dt_powerd_senda	4	382	Dec 14, 2010 by dt_powerd_senda
	dt125 running rough on half throttle (Preview) Hi all, i've got a 1990 dtr 125 and runs ok at low revs but at half throttle is running really rough and spluttering,does anyone know what could cause this? cheers	Monkey	12	367	Dec 12, 2010 by Monkey
	2000 dtr 125 seized (Preview) right lads i recently got a 2000 yam dtr 125 which had been rebord to a 175 not so long back before i got it. i had been givng it abit of stick for 5 days running and giving it all the check overs before going out on it the basics realy then today i let bike warm up for ten mins by just going round track at a stedy p...	leebo	7	299	Dec 11, 2010 by louisBOSS
	barrel (Preview) i know that a 2006 barrel will bolt on and fit my 89 bottom end just want to know if the exhaust ports are the same will my expansion chamber bolt on as it normally would?? cheers	zo0op	2	246	Dec 10, 2010 by zo0op
	Weak spark (Preview) well my bike cut out now wont start, has a very weak spark. changed the coil and still no luck. if i leave if for about an hour it will start up for about 10secs but runs really rough and will cut out again. anyone no whats going on	JORDAN-43	10	391	Dec 8, 2010 by JORDAN-43
	lack of power (Preview) getting a major bog/splutter where my power band should be, been trying jetting now starting to think it may be the reeds, anyone else had knackered reeds? did you find lower revs to be fine just dieing when reving higher? that or its a electrial problem, just trying to eliminate all mechanical probs f...	fuggie	4	334	Dec 6, 2010 by fuggie
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