DT125R ARCHIVE

richie · richie

my engine seized couple of weeks ago no idea why but had the barrel honed and new piston and rings etc fitted , anyway ran it up on friday done 38 miles taking my time as new piston etc then all of a sudden a loud ratterling noise and knocking coming from the top end at first i thought the exhaust might of been l...

chappy 1981 · chappy 1981

hi folks i rebuilt my 1998 dtr but cant get it to start, its getting spark and is firin plenty o fumes comin out exhaust, not sure wot prob is, i got a carb from ebay but the pilot screw is mashed, would this be a reason for not starting? i am lost for ideas, major stressing out about it. please help Will try any...

gooner78 · gooner78

As title says its fine when you pin it and when your slowing down but when you try to hold the bike at a constant speed its running ruff it does not matter what gear your in or how fast your going it just does not want to be held a a constant speed any help would be great thanks.

tripr · tripr

can you see the extra lip on top of my +1.50 piston . iv just noticed it with the barrel being overbored the 3mb head combustion chambers edge is visable inside the cylinder by the look of the piston its cut a line out where the lip in the barrel is visable this has gotta be why iv been through so many to...

Nathlaad · Nathlaad

Well yet again my clutch cable decided to snap and by the looks of it my clutch arm has also decided to break, this is the second time this has happened in the last 2-3 months. theres got to be an underlying issue with this and i'm lost with what to do, anyone got any ideas? starting to really get aggregrated...

plebpl · plebpl

hey guys, i noticed that in 6th dear at low revs im getting a loud whiring sound. never happened before so its a new issue. be honest am i looking at a new gearbox?

Seanyftw · Seanyftw

Hey guys, so i've got a 2005 DTRE that's eating the petrol up, someone's tampered with the carb previously and it's running rich etc but the ****ing screw is absolutely knackered. What's the best way to go about fixing this? I can't go out on long rides till this is sorted cause it cost me £30 in petrol in...

richie · richie

anyone ever tried to fit a yz engine in a dt

edchina · edchina

Hello,I bought new piston with curved dome for my yamaha tzr 125rr ,the old one has flat dome.Cyl code is 4FUOO Y-2 ,cyl head code is 4FUO Y-3.Is this new piton going to be ok?Will it be to big compression?

Kalamity Kid · Kalamity Kid

Is is just me or has General Chat area gone walkies????

Jonpearson17 · Jonpearson17

On my way home from college my bike had nooooo power at 6k rpm+ and it went really quiet like i had the oringal exhaust on, And bout a mile from my house it went back to normal, What you recon is caused it to loose top end power and make it really quiet ? I warm the bike up by revin it to 5k rpm for like 3 mins then let...

CooS · CooS

Not sure if I should post this here or not but I need to know lol Right so my mate has a 1991ish kx125 that he brought and has never used it he is to busy doing his mini project! So the motor is leaking out transmission oil from the clutch cover (ben changed so that's fixed) and is leaking from the left cran...

gareth_iowc · gareth_iowc

hey all, i have a 2000 dtr and i'm looking for a engine with a bit more power. i know it would be easyer to change the bike but i really like it and dont really want to change. can any one recommend any thing? cheers

littlebasher · littlebasher

Hi all The Mikuni flat slide carb as fitted to the later DT's - is there supposed to be an adjuster screw on the off side of the carb? I've got an idle speed adjuster and another plugged screw on the nearside, but there's no adjuster screw at all on the nearside of mine. So, is there supposed to be one, what...

yoshi · yoshi

hi to all new member and only here as 5 months ago decided to buy me a dt125r 1989 model. problem i have is that the bike does not like revin when in gears and riding. she starts first/second kick even when cold and idles well but as u start riding somewhere in the 3 to 6k rpm will loose power and not pick up spee...

Sgt-syphilis · Sgt-syphilis

This wont fit my 05 dtx will it...? Link And bike breaking... [url=http://www.ebay.co...

sheldonherron · sheldonherron

Hi there i recently had an engine rebuild and the mechanic adjusted my power valve so its not as quick as it used to be ive done well over 700 miles and want to turn it back up so its at optimal performance. Now it hits the power valve it kind of wants to go abit more but is being restricted. using the 1 and 2 adj...

Sgt-syphilis · Sgt-syphilis

Ok...so had a look a most of the hundreds of chain and sprocket threads and coukdnt find my answer..basically i bought a 13 tooth front sprok and fitted it yest...my chain was on tightness level 12.5 ish...but when i put the new sprok on...even when it was tightned to the max, the chain was still just too...

jakeDT125 · jakeDT125

ok guys i have been a stupid f*** and ran my dt without 2stroke, ofcourse unintentially but its probs been a good 100 mile, today it conked out and im ****ting myself. has she seazed up? how can i check?

neilmanns · neilmanns

ok im riding a long and give it some beans, i usually take it up to the red lie 9k ad change up, but i have just noticed that if i hold it in gear after 9.5k it starts picking up again ?? til about 11k doesnt sould like its thrashing neither ?? help!!

Blinners · Blinners

The general chat section has revved up and fooked off and i wish to chat some general sh!te

gooner78 · gooner78

Are they perforce kits or just replaement for the standard ones thanks

littlebasher · littlebasher

My TDR has a Mikuni flat slide carb on it, no doubt the same that is fitted to many a DT Anyway, although the near side of the card has the idle screw and a smaller (mixture?) screw, the offside has a hole for an adjustment screw - but no screw! So, anyone know if a screw is meant to be in there, what it's for (mi...

landyfan88 · landyfan88

Hi there, obviously there are many threads reference to derestricting, i am just slightly puzzled as whilkst im out riding, one minute it will rev and pull to kingdom come, the next it will be restricted and the powervalve is not doing anything? It has a big one exhaust. I have tried earthing out the cab...

richie · richie

found out today that my bike has been rebored twice before because its plus 1 does anybody know what cc it is now roughly >

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
	help losing the will (Preview) my engine seized couple of weeks ago no idea why but had the barrel honed and new piston and rings etc fitted , anyway ran it up on friday done 38 miles taking my time as new piston etc then all of a sudden a loud ratterling noise and knocking coming from the top end at first i thought the exhaust might of been l...	richie	7	331	Oct 25, 2011 by richie
	rebuilt it but wont run (Preview) hi folks i rebuilt my 1998 dtr but cant get it to start, its getting spark and is firin plenty o fumes comin out exhaust, not sure wot prob is, i got a carb from ebay but the pilot screw is mashed, would this be a reason for not starting? i am lost for ideas, major stressing out about it. please help Will try any...	chappy 1981	18	370	Oct 24, 2011 by Kalamity Kid
	misfire when holding the revs (Preview) As title says its fine when you pin it and when your slowing down but when you try to hold the bike at a constant speed its running ruff it does not matter what gear your in or how fast your going it just does not want to be held a a constant speed any help would be great thanks.	gooner78	2	345	Oct 24, 2011 by gooner78
	see this do you think its an issue (Preview) can you see the extra lip on top of my +1.50 piston . iv just noticed it with the barrel being overbored the 3mb head combustion chambers edge is visable inside the cylinder by the look of the piston its cut a line out where the lip in the barrel is visable this has gotta be why iv been through so many to...	tripr	7	395	Oct 24, 2011 by gasto
	Yet another Clutch cable! (Preview) Well yet again my clutch cable decided to snap and by the looks of it my clutch arm has also decided to break, this is the second time this has happened in the last 2-3 months. theres got to be an underlying issue with this and i'm lost with what to do, anyone got any ideas? starting to really get aggregrated...	Nathlaad	9	321	Oct 23, 2011 by Nathlaad
	6th gear whir (Preview) hey guys, i noticed that in 6th dear at low revs im getting a loud whiring sound. never happened before so its a new issue. be honest am i looking at a new gearbox?	plebpl	14	406	Oct 20, 2011 by plebpl
	Carb adjustment help please :) (Preview) Hey guys, so i've got a 2005 DTRE that's eating the petrol up, someone's tampered with the carb previously and it's running rich etc but the ****ing screw is absolutely knackered. What's the best way to go about fixing this? I can't go out on long rides till this is sorted cause it cost me £30 in petrol in...	Seanyftw	10	407	Oct 20, 2011 by Seanyftw
	yz 125 engine (Preview) anyone ever tried to fit a yz engine in a dt	richie	22	622	Oct 19, 2011 by Motorcycle_Enthusiast
	tzr dt piston diference (Preview) Hello,I bought new piston with curved dome for my yamaha tzr 125rr ,the old one has flat dome.Cyl code is 4FUOO Y-2 ,cyl head code is 4FUO Y-3.Is this new piton going to be ok?Will it be to big compression?	edchina	11	1119	Oct 19, 2011 by fuggie
	Where is General Chat forum gone??? (Preview) Is is just me or has General Chat area gone walkies????	Kalamity Kid	1	263	Oct 19, 2011 by Kalamity Kid
	Loss of power? (Preview) On my way home from college my bike had nooooo power at 6k rpm+ and it went really quiet like i had the oringal exhaust on, And bout a mile from my house it went back to normal, What you recon is caused it to loose top end power and make it really quiet ? I warm the bike up by revin it to 5k rpm for like 3 mins then let...	Jonpearson17	6	440	Oct 19, 2011 by the only way is YAMAHA DTR
	Can crank case's be fixed when cracked? (Preview) Not sure if I should post this here or not but I need to know lol Right so my mate has a 1991ish kx125 that he brought and has never used it he is to busy doing his mini project! So the motor is leaking out transmission oil from the clutch cover (ben changed so that's fixed) and is leaking from the left cran...	CooS	3	306	Oct 19, 2011 by CooS
	engine change recommendations (Preview) hey all, i have a 2000 dtr and i'm looking for a engine with a bit more power. i know it would be easyer to change the bike but i really like it and dont really want to change. can any one recommend any thing? cheers	gareth_iowc	2	295	Oct 18, 2011 by CooS
	Mikuni flat slide carb (Preview) Hi all The Mikuni flat slide carb as fitted to the later DT's - is there supposed to be an adjuster screw on the off side of the carb? I've got an idle speed adjuster and another plugged screw on the nearside, but there's no adjuster screw at all on the nearside of mine. So, is there supposed to be one, what...	littlebasher	7	538	Oct 18, 2011 by Motorcycle_Enthusiast
	Carb Issues i think. (Preview) hi to all new member and only here as 5 months ago decided to buy me a dt125r 1989 model. problem i have is that the bike does not like revin when in gears and riding. she starts first/second kick even when cold and idles well but as u start riding somewhere in the 3 to 6k rpm will loose power and not pick up spee...	yoshi	2	315	Oct 18, 2011 by yoshi
	Will it fit?/ Petrol cap for seiki and other bits! (Preview) This wont fit my 05 dtx will it...? Link And bike breaking... [url=http://www.ebay.co...	Sgt-syphilis	9	318	Oct 17, 2011 by Seiki
	YPVS power valve setting adjustment. HELP! (Preview) Hi there i recently had an engine rebuild and the mechanic adjusted my power valve so its not as quick as it used to be ive done well over 700 miles and want to turn it back up so its at optimal performance. Now it hits the power valve it kind of wants to go abit more but is being restricted. using the 1 and 2 adj...	sheldonherron	10	714	Oct 17, 2011 by tripr
	Sprocket/chain replacement (Preview) Ok...so had a look a most of the hundreds of chain and sprocket threads and coukdnt find my answer..basically i bought a 13 tooth front sprok and fitted it yest...my chain was on tightness level 12.5 ish...but when i put the new sprok on...even when it was tightned to the max, the chain was still just too...	Sgt-syphilis	4	315	Oct 15, 2011 by Sgt-syphilis
	silly get :/ (Preview) ok guys i have been a stupid f* and ran my dt without 2stroke, ofcourse unintentially but its probs been a good 100 mile, today it conked out and im **ting myself. has she seazed up? how can i check?	jakeDT125	19	347	Oct 14, 2011 by El_Faggo
	revs ?? (Preview) ok im riding a long and give it some beans, i usually take it up to the red lie 9k ad change up, but i have just noticed that if i hold it in gear after 9.5k it starts picking up again ?? til about 11k doesnt sould like its thrashing neither ?? help!!	neilmanns	0	275	Oct 13, 2011 by neilmanns
	Its missing (General Chat) (Preview) The general chat section has revved up and fooked off and i wish to chat some general sh!te	Blinners	2	570	Oct 13, 2011 by Blinners
	anthena 125 cylinder kits (Preview) Are they perforce kits or just replaement for the standard ones thanks	gooner78	9	440	Oct 12, 2011 by DT-R_bradders
	Mikuni flat slide carb (Preview) My TDR has a Mikuni flat slide carb on it, no doubt the same that is fitted to many a DT Anyway, although the near side of the card has the idle screw and a smaller (mixture?) screw, the offside has a hole for an adjustment screw - but no screw! So, anyone know if a screw is meant to be in there, what it's for (mi...	littlebasher	1	242	Oct 12, 2011 by jaymc129
	DTRE 2005 restriction issues (Preview) Hi there, obviously there are many threads reference to derestricting, i am just slightly puzzled as whilkst im out riding, one minute it will rev and pull to kingdom come, the next it will be restricted and the powervalve is not doing anything? It has a big one exhaust. I have tried earthing out the cab...	landyfan88	2	298	Oct 11, 2011 by DT-R_bradders
	piston size (Preview) found out today that my bike has been rebored twice before because its plus 1 does anybody know what cc it is now roughly >	richie	4	340	Oct 8, 2011 by tripr
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