DT125R ARCHIVE

woll · woll

Well as the title says im interested to know how many miles you lads get to a tank of fuel including or excluding reserve (tell us which one) and if your bikes deres. I ask because im gettin 50 miles without reserve and 60 with and my new job is 30 miles there and back and i cba filling up every other day lol. i w...

woll · woll

Went for a razz yesterday around a 4x4 experience with mates, the temp kept going very close to the red so i had to stop quite a lot. I've never had it that hot before, it does go a bit warmer when i ride slow speed so i did think it might be that as i wasn't going fast but then coming home doing about 60 it flew up t...

xGINCATx · xGINCATx

Hey guys, I'm new to the forum and just wanting some advice. I'm thinking about upgrading my front sprocket from 16 teeth to 18 and my rear sprocket from 57 teeth to 53. It goes about 80mph as it is and i can go through the gearbox really quick. How much quicker do you think it will go? Also how much extra will...

conn1987 · conn1987

i have a dt125r 2002 with 24000km on the clock it is a french import i have derestricted the exhaust take the reed switch out of the speedo and it will only do 80kmh!!! ypvs is set up does the cycle when u turn the ignition on i turned it 180 % to see if it was that and it made no difference at all please help me bef...

xk120c · xk120c

Hi Guys ! A few weeks ago i was riding quite agressive and im pretty sure that my engine has let go as the bike cut out and there was a clonking noise from my top end! I have taken my exhuast of and had a little look up the exhaust port and this is what i have found ! More pics to come soon . . .

JORDAN-43 · JORDAN-43

hi guys, new here, had my engine out because the gears were playing up and now its running with are the gear working perfectly but i think the clutch is unbalanced because when i rev it it vibrates quite bad, does anyone know what the symtons are if my clutch is unbalanced or if its anything else thats wro...

Dickhead · Dickhead

i have a dtre bottom end kiking about with 3000 miles on it i want to put it in my dtr i have a 1992 dtr with a 2001 loom engine in it i want to wire the new engine to use the 2001 loom can it be done ? as farf as the genorator is concerned i have worked it out the pulse coil is the same but ther is anouther coil for the i...

DangerousDave87 · DangerousDave87

Alright guys, I decided to clean my carb out at the weekend as the revs kept sticking. All went well untill my liltle bro decided to squeeze the rad pipe and coolant poured all over the engine. I cleaned it up and it didn't look like any got inside. I've put the bike back together but now it won't rev past 5-6...

SARK · SARK

i was just driving my bike and suddenly there was a loud clunky noise and the bike came to a halt. sounded like inside the engine, i then tried to kick start it and the noise did not sound right... the piston still hit the top of the cylinder but the noise sounded like something was cracked please help, this...

denzx03 · denzx03

hi ive got a dtr 125 and when its running it seems to lack in power its like theres not enough petrol going through it and it like picks up then slows down ive taken carb of air box/filter and thats not sorted it it sometimes nearly stalls when setting of you have to give it a few revs, and at top end its like its...

Peter T · Peter T

When i upshift from 1st to second it now is jumping back into neutral. It is fine if i am changing down from higher gears? Checked the clutch, changed the oil, checked the chain tension and sprockets all are fine? Could it be an internal selector fork problem?

craigbulmer · craigbulmer

right.. i have a 2003 DT125R, ive done the clock deres, ive got a gutted standard exhaust on my bike atm. i rebuilt the top end on it 1000 miles, really good compression im thinking and couple of people ive asked are thinking i might have a carb problem.. when i stop from riding, it idles at 3k and wont go dow...

frogboy · frogboy

OK Ok ok, got my bike now (2006 dt-x), got a DEP full system on it, i get 75ish out of it, so striped the wire out the back of the speedo the green brown wire and conected a longer wire then rapped this round the screw which holds the ignition to the frame, nothing happend ? what am i doing wrong (im thinking the...

MisterDave · MisterDave

Is it just me or do we all break down about every 100miles. I had been riding around all day and went to pop to the garage and heard a slight pop and lost engine power managed to bump start it again while in the process of breaking down but then it really died am thinkinkg it may have been due to the rubber grome...

fray · fray

Just got my bike out the shed this morning and thought id have check over ov her make sure everything was ok and i noticed something i havent noticed before. My bottom end has 3BN 03 on itCylinder has 3MB 00Head 3BN They all have Y1 stamped on them but why does they cylinder part number not match the others?...

craigbulmer · craigbulmer

http://www.youtube.com/watch?v=k5PZ8vauZR8&feature=related

Andee B · Andee B

Hi guys, new here and may seem a bit cheeky as its my first post asking a technical question......... BUT....... im at my wits end with this DT. Got it a couple of weeks ago and was told the water pump has gone. Thought " nae bother ", but it wasnt to be. How the hell does it come out ? Ive got a spare c...

fray · fray

Hi guys!! Today i went out on my bike to the shops, when i got back i noticed the temp gauge was at 3/4 to max. Normally doesnt go above 1/4 I let it cool down when i got home and checked the coolant in the rad, all was fine. Went out again and when the temp got to 3/4 again it suddenly dropped right down to normal i...

conn1987 · conn1987

as title says in my dt manual it says to get 10w30 but the shops round me dont sell it anymore so iv been using 10w40 and now iv been on ebay and they sell it on there so im wondering if its worth me spending an extra couple of quid to get the 10w30 stuff

Seiki · Seiki

.... yourself Had a few issues with the DT that I wanted sorted before it sold . No horn No headlight Power loss Took LH electrics apart and cleaned the fcuk out of everything , plugged it back in and now have bright headlight ( when I rev lol ) and a HORN Then read a few threads on here about power loss and work...

DTPOWER · DTPOWER

damn it !! i need to change the sprockets and i can't get the side cover off to access the fron sprocket.. i unscrewed all the screws but one and as most of you probably know the screws are quite weird looking and have a rubber seal on them. i have nearly stripped the screw and tried all the screw drivers that...

danny boy · danny boy

Right guys! Next situation is..... My bike can be started by hand. It's so easy it's unreal. To me probably being naïve, this is brilliant! I have since been told this is not a good thing and means there is no compression. I do not have a compression tester. Does this mean it wants sorting? I've also b...

DeeTee · DeeTee

Hey guys, I compared my power vale operation to that of a DTRE, Now mine goes from closed to open with increasing revs but the DTRE goes the opposite direction, ie from closed...to even more closed, it turns clockwise with increasing revs!!! (Viewed from the pulley) So DTRE / DTX owners...how about yo...

fray · fray

I need to replace my clutch cover gasket as its leaking. Is it as simple as taking the kick start lever off, taking all the screws that hold the clutch cover on replacing gasket and refittng or is there more to it than that! The oil pump is attached to the clutch cover do you have to take this off or can it come...

danny boy · danny boy

Hi guys, Im new here, just bought a DTR 125 (2001) last week. It's been set up for the field so the lights, speedo and ignition etc have gone, The bike does however still have the battery and some wiring which you can see has been severed near the headstock. Now I've read a few of the previous posts regardi...

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
	How many miles to a tank? ( 1 2 ) (Preview) Well as the title says im interested to know how many miles you lads get to a tank of fuel including or excluding reserve (tell us which one) and if your bikes deres. I ask because im gettin 50 miles without reserve and 60 with and my new job is 30 miles there and back and i cba filling up every other day lol. i w...	woll	33	1540	Jun 15, 2010 by xGINCATx
	what the funk? (Preview) Went for a razz yesterday around a 4x4 experience with mates, the temp kept going very close to the red so i had to stop quite a lot. I've never had it that hot before, it does go a bit warmer when i ride slow speed so i did think it might be that as i wasn't going fast but then coming home doing about 60 it flew up t...	woll	14	297	Jun 14, 2010 by woll
	Changing sprockets for more top speed..? (Preview) Hey guys, I'm new to the forum and just wanting some advice. I'm thinking about upgrading my front sprocket from 16 teeth to 18 and my rear sprocket from 57 teeth to 53. It goes about 80mph as it is and i can go through the gearbox really quick. How much quicker do you think it will go? Also how much extra will...	xGINCATx	25	577	Jun 13, 2010 by fray
	DT125r 2002 is super slow!!! please help me ( 1 2 3 ) (Preview) i have a dt125r 2002 with 24000km on the clock it is a french import i have derestricted the exhaust take the reed switch out of the speedo and it will only do 80kmh!!! ypvs is set up does the cycle when u turn the ignition on i turned it 180 % to see if it was that and it made no difference at all please help me bef...	conn1987	69	1337	Jun 9, 2010 by Jordy_NI
	DT125 Engine Let go! (Preview) Hi Guys ! A few weeks ago i was riding quite agressive and im pretty sure that my engine has let go as the bike cut out and there was a clonking noise from my top end! I have taken my exhuast of and had a little look up the exhaust port and this is what i have found ! More pics to come soon . . .	xk120c	12	366	Jun 7, 2010 by satelliteone
	dt clutch (Preview) hi guys, new here, had my engine out because the gears were playing up and now its running with are the gear working perfectly but i think the clutch is unbalanced because when i rev it it vibrates quite bad, does anyone know what the symtons are if my clutch is unbalanced or if its anything else thats wro...	JORDAN-43	7	317	Jun 3, 2010 by Malc
	dtre engine in a dtr (Preview) i have a dtre bottom end kiking about with 3000 miles on it i want to put it in my dtr i have a 1992 dtr with a 2001 loom engine in it i want to wire the new engine to use the 2001 loom can it be done ? as farf as the genorator is concerned i have worked it out the pulse coil is the same but ther is anouther coil for the i...	Dickhead	0	192	Jun 3, 2010 by Dickhead
	Splutter/misfire (Preview) Alright guys, I decided to clean my carb out at the weekend as the revs kept sticking. All went well untill my liltle bro decided to squeeze the rad pipe and coolant poured all over the engine. I cleaned it up and it didn't look like any got inside. I've put the bike back together but now it won't rev past 5-6...	DangerousDave87	8	291	May 27, 2010 by SimsonS51E
	HELP!!! (Preview) i was just driving my bike and suddenly there was a loud clunky noise and the bike came to a halt. sounded like inside the engine, i then tried to kick start it and the noise did not sound right... the piston still hit the top of the cylinder but the noise sounded like something was cracked please help, this...	SARK	26	347	May 25, 2010 by SARK
	DTR125 HELP WITH RUNNING (Preview) hi ive got a dtr 125 and when its running it seems to lack in power its like theres not enough petrol going through it and it like picks up then slows down ive taken carb of air box/filter and thats not sorted it it sometimes nearly stalls when setting of you have to give it a few revs, and at top end its like its...	denzx03	27	415	May 16, 2010 by miffer
	Jumping out of 2nd gear (Preview) When i upshift from 1st to second it now is jumping back into neutral. It is fine if i am changing down from higher gears? Checked the clutch, changed the oil, checked the chain tension and sprockets all are fine? Could it be an internal selector fork problem?	Peter T	3	252	May 13, 2010 by ben350
	Getting my bike running spot on (Preview) right.. i have a 2003 DT125R, ive done the clock deres, ive got a gutted standard exhaust on my bike atm. i rebuilt the top end on it 1000 miles, really good compression im thinking and couple of people ive asked are thinking i might have a carb problem.. when i stop from riding, it idles at 3k and wont go dow...	craigbulmer	15	342	May 12, 2010 by 2stroke
	Give me more power dam it ! (Preview) OK Ok ok, got my bike now (2006 dt-x), got a DEP full system on it, i get 75ish out of it, so striped the wire out the back of the speedo the green brown wire and conected a longer wire then rapped this round the screw which holds the ignition to the frame, nothing happend ? what am i doing wrong (im thinking the...	frogboy	10	461	May 9, 2010 by Dickhead
	Breaking down (Preview) Is it just me or do we all break down about every 100miles. I had been riding around all day and went to pop to the garage and heard a slight pop and lost engine power managed to bump start it again while in the process of breaking down but then it really died am thinkinkg it may have been due to the rubber grome...	MisterDave	17	299	May 8, 2010 by Spartan
	Hmmmmmmm.......... (Preview) Just got my bike out the shed this morning and thought id have check over ov her make sure everything was ok and i noticed something i havent noticed before. My bottom end has 3BN 03 on itCylinder has 3MB 00Head 3BN They all have Y1 stamped on them but why does they cylinder part number not match the others?...	fray	18	613	May 4, 2010 by Dickhead
	Going off the rev clock (Preview) http://www.youtube.com/watch?v=k5PZ8vauZR8&feature=related	craigbulmer	7	263	May 4, 2010 by RudiRulez
	1997 / 8 DT125 Water Pump. (Preview) Hi guys, new here and may seem a bit cheeky as its my first post asking a technical question......... BUT....... im at my wits end with this DT. Got it a couple of weeks ago and was told the water pump has gone. Thought " nae bother ", but it wasnt to be. How the hell does it come out ? Ive got a spare c...	Andee B	9	355	Apr 29, 2010 by satelliteone
	Thermostat problem maybe???? Turns out to be head gasket again ( 1 2 ) (Preview) Hi guys!! Today i went out on my bike to the shops, when i got back i noticed the temp gauge was at 3/4 to max. Normally doesnt go above 1/4 I let it cool down when i got home and checked the coolant in the rad, all was fine. Went out again and when the temp got to 3/4 again it suddenly dropped right down to normal i...	fray	56	909	Apr 24, 2010 by craigbulmer
	whats the best gearbox oil to get?? (Preview) as title says in my dt manual it says to get 10w30 but the shops round me dont sell it anymore so iv been using 10w40 and now iv been on ebay and they sell it on there so im wondering if its worth me spending an extra couple of quid to get the 10w30 stuff	conn1987	11	385	Apr 17, 2010 by craigbulmer
	Nothing better than fixing your bike .... (Preview) .... yourself Had a few issues with the DT that I wanted sorted before it sold . No horn No headlight Power loss Took LH electrics apart and cleaned the fcuk out of everything , plugged it back in and now have bright headlight ( when I rev lol ) and a HORN Then read a few threads on here about power loss and work...	Seiki	7	246	Apr 17, 2010 by satelliteone
	Help!!!!! removing the crankcase cover =( (Preview) damn it !! i need to change the sprockets and i can't get the side cover off to access the fron sprocket.. i unscrewed all the screws but one and as most of you probably know the screws are quite weird looking and have a rubber seal on them. i have nearly stripped the screw and tried all the screw drivers that...	DTPOWER	7	202	Apr 16, 2010 by DTPOWER
	Time for a rebuild?!? (Preview) Right guys! Next situation is..... My bike can be started by hand. It's so easy it's unreal. To me probably being naïve, this is brilliant! I have since been told this is not a good thing and means there is no compression. I do not have a compression tester. Does this mean it wants sorting? I've also b...	danny boy	26	383	Apr 14, 2010 by craigbulmer
	Power Valve Direction, DTR 2003 v's DTRE 2007 (Preview) Hey guys, I compared my power vale operation to that of a DTRE, Now mine goes from closed to open with increasing revs but the DTRE goes the opposite direction, ie from closed...to even more closed, it turns clockwise with increasing revs!!! (Viewed from the pulley) So DTRE / DTX owners...how about yo...	DeeTee	12	543	Apr 14, 2010 by MisterDave
	Clutch cover gasket fitting (Preview) I need to replace my clutch cover gasket as its leaking. Is it as simple as taking the kick start lever off, taking all the screws that hold the clutch cover on replacing gasket and refittng or is there more to it than that! The oil pump is attached to the clutch cover do you have to take this off or can it come...	fray	18	541	Apr 12, 2010 by fray
	Field Bike Set Up (Preview) Hi guys, Im new here, just bought a DTR 125 (2001) last week. It's been set up for the field so the lights, speedo and ignition etc have gone, The bike does however still have the battery and some wiring which you can see has been severed near the headstock. Now I've read a few of the previous posts regardi...	danny boy	21	297	Apr 7, 2010 by plebpl
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