DT125R ARCHIVE

MDK · MDK

this looks like a intresting read .. Two Stroke TUNERS HANDBOOK pdf http://www.amrca.com/tech/tuners.pdf alsoMikuni Carbhttp://www.smellofdeath.com/lloydy/other/mikuni_tuning.pdf

Ralzy · Ralzy

http://www.yamaha-motor.eu/uk/information/parts-catalogue.aspx

NEV · NEV

DT125R 2 STROKE LUBRICATION SYSTEM - 2 STROKE OIL PUMP[URL=http://imageshack.us/photo/my-images/26/oilpump2.jpg/][IMG]http://img26.i...

Seiki · Seiki

This section is currently being worked on, threads are being moved to relevant sub forums. Please continue to post here if your topic is NOT covered in the other Top End/Bottom End sections.

matt rhoades · matt rhoades

On my quest to de-restriction i cut my xpanny open with a big grin on me face, waiting for some cresent shaped steel bits to be smiling back at me........guess what.......none there just a load of mesh which was holding in the baffling!!!!!! Ripped them out and welded it back up. There is a diffe...

tomimsmith1992 · tomimsmith1992

Hi lads, so me and my dad have 2 dtr frames so the plan is to build one original to sell on for the road and to fund the other project. both 2000-2003 So on to the good Stuff. the plan is to build something different and still roadworthy. my question is how to make the dt hit a 90mph or maybe possibly the 100mph....

2BLimitless · 2BLimitless

Think I have the same problem as akaTheif, I have a 2003 DTR. It has standard sprockets 16T/57T. But for what ever reason in 6th gear I am at redline @65mph. Does anyone know why my gearing ratio's might be ****Êd up so much? did anyone sell any "racing gearing" back in the day for the DT? etc?

Liam12 · Liam12

[IMG]https://i829.photobucket.com/albums/zz217/lfsfl...

2BLimitless · 2BLimitless

can anyone tell me why someone would want to remove this part of the engine?

GoProKid95 · GoProKid95

Hi all, Just done about 112 miles on my dt and I needed to switch it over to the reserve on the tank as the bike conked out. This has been just under a week since fill up :S Is this okay or is this sort of mileage a littler lower than usual? I'm thinking the bike is running on the rich side! HELP ME! tj

gooner78 · gooner78

My bike has just started to develope an erratic idle most of the time its fine but sometimes when I stop for traffic lights ect it will tickover at 2000rpm and sometimes it will drop to 1000rpm it normally ticks over at 1300orpm. My bikes done 29000miles and I've done 25000 of those miles and the carbs nev...

Energized · Energized

Thought i'd share, I know a few people will be interested Porto tuned DTR running a TZR gearbox and cylinder, with custom hand made pipe etc. 158kmh/98mph on the first test run, his best on the day was 164kmh/102mph. One of these best speeds on a similar DT is 170kmh which = 105.6mph. Confirmed via vario...

the only way is YAMAHA DTR · the only way is YAMAHA DTR

Ok finally had time to get on with my bike , snapped the thread on the choke so can't start it My cdi came without the powervalve set up, so have come to the conclusion that 100% is closed and 0% is open, there are so many settings I don't understand yet, but help a...

M4rcust · M4rcust

Hey guys! Tried searching around for any topics regarding using Seafoam on a DT125, and it hasn't been talked about before. Anyone had any experiences with this? I have a can of it, and was thinking what was the best way to use it. (eg. in a tank of gas, crankcase) Would greatly appreciate all thoughts

Sukiz · Sukiz

which of the latest v force reeds would fit the dtr engine? thanks

mr karnage · mr karnage

Rebuilt this engine twice now and it's got the same problem, I rebuilt it because it revs by itself as soon as I start it, goes all the way up to about 5k and then dies when you turn choke off. If you put it on about half way I can get it to settle but it sounds like it wants to die. Everything's been tightened a...

Reef · Reef

so gonna be replacing all my hoses and fuel lines but before I go out and measure up al the hoses and lines does any one know the info so I can order em without doing so?? A lot of fanny arsing around and surely some you lads have replaced em all not so long ago so hoses, any one know the sizes of hose I'm gonna be n...

dan28 · dan28

http://imagizer.imageshack.us/v2/800x600q90/839/1i0g.jpg

gasto · gasto

What is the maximum bore size for the 3mb cylinder?I see that the biggest piston i found is+1.50mm.On the other hand for the 3bn is 58.40.Is there any difference in the pistons? Can i use the 58.40 piston to the 3mb cylinder?

the only way is YAMAHA DTR · the only way is YAMAHA DTR

Has anyone done this? Had this idea for a long time Basically when you fit a bigger carb you need a bigger airbox to carb rubber, the rear spigot is 60 mm and a yz125 88 measures 60mm So may try thi, can screw to airbox,

seancullen · seancullen

thinking about sending my top end off to stan for a full stage 3 and the crank for a rebuild just for peace of mind, has anyone else had a stage 3 done and what sort of gains did you notice from it? will be fitting racing reeds too and already have a giannelli full system

dread123 · dread123

can anyone confirm if the standard reed petals on 2001 dt125r are metal or plastic? not sure if the spare one i have is aftermarket ? it is clear plastic? i have read conflicting reports that they are metal on some and plastic on others(standard) any pics please if you can confirm what it should look lik...

Nathlaad · Nathlaad

Alright guys i've got myself a major head scratching problem, basically my clutch cable snapped the other week so i've now replaced that, but first of when i've adjusted all the tension to max asin the one's by the lever and down by the hook it's still not engaging the clutch fully! took apart the clutch...

ezegreenfingers · ezegreenfingers

[IMG]https://i1250.photobucket.com/albums/hh540/Ezegreenfingers/0c89f46d11c5...

slob · slob

Well I have been looking for a new DT to do over the winter but no luck, just a load of chav ringer "offroaders" with no documents ect. So I have set myself a challenge as I have missed the mechanical side of things recently after last winter. This may be a pritty bad idea but we will see how it goes...

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
	STICKY: Two Stroke TUNER’S HANDBOOK pdf (Preview) this looks like a intresting read .. Two Stroke TUNERS HANDBOOK pdf http://www.amrca.com/tech/tuners.pdf alsoMikuni Carbhttp://www.smellofdeath.com/lloydy/other/mikuni_tuning.pdf	MDK	3	1853	Feb 24, 2014 by NEV
	STICKY: Yamaha Parts Order codes with exploded diagrams (96 Models Onwards Only) (closed) (Preview) http://www.yamaha-motor.eu/uk/information/parts-catalogue.aspx	Ralzy	0	1606	Jan 14, 2013 by Ralzy
	STICKY: DT125R 2 STROKE LUBRICATION SYSTEM - PARTS BREAKDOWN (Preview) DT125R 2 STROKE LUBRICATION SYSTEM - 2 STROKE OIL PUMP[URL=http://imageshack.us/photo/my-images/26/oilpump2.jpg/][IMG]http://img26.i...	NEV	0	1576	Jul 2, 2012 by NEV
	STICKY: WORK IN PROGRESS (Preview) This section is currently being worked on, threads are being moved to relevant sub forums. Please continue to post here if your topic is NOT covered in the other Top End/Bottom End sections.	Seiki	0	1591	Mar 26, 2012 by Seiki
	ANOTHER de-restriction post!! (Preview) On my quest to de-restriction i cut my xpanny open with a big grin on me face, waiting for some cresent shaped steel bits to be smiling back at me........guess what.......none there just a load of mesh which was holding in the baffling!!!!!! Ripped them out and welded it back up. There is a diffe...	matt rhoades	12	4257	Aug 26, 2016 by Sdrobo
	Tuning For Santa POD (Preview) Hi lads, so me and my dad have 2 dtr frames so the plan is to build one original to sell on for the road and to fund the other project. both 2000-2003 So on to the good Stuff. the plan is to build something different and still roadworthy. my question is how to make the dt hit a 90mph or maybe possibly the 100mph....	tomimsmith1992	20	3894	Jul 7, 2015 by AndyYam
	Screaming at 65mph (Preview) Think I have the same problem as akaTheif, I have a 2003 DTR. It has standard sprockets 16T/57T. But for what ever reason in 6th gear I am at redline @65mph. Does anyone know why my gearing ratio's might be ****Êd up so much? did anyone sell any "racing gearing" back in the day for the DT? etc?	2BLimitless	8	2010	Sep 27, 2014 by Victor
	Super big bore kit (Preview) [IMG]https://i829.photobucket.com/albums/zz217/lfsfl...	Liam12	18	3190	Sep 8, 2014 by Liam12
	why remove the YEIS? (Preview) can anyone tell me why someone would want to remove this part of the engine?	2BLimitless	11	2185	Aug 27, 2014 by gooner78
	Is my tuning okay? 06 DT125RE (Preview) Hi all, Just done about 112 miles on my dt and I needed to switch it over to the reserve on the tank as the bike conked out. This has been just under a week since fill up :S Is this okay or is this sort of mileage a littler lower than usual? I'm thinking the bike is running on the rich side! HELP ME! tj	GoProKid95	5	2059	Aug 16, 2014 by Luke
	Erratic Idle (Preview) My bike has just started to develope an erratic idle most of the time its fine but sometimes when I stop for traffic lights ect it will tickover at 2000rpm and sometimes it will drop to 1000rpm it normally ticks over at 1300orpm. My bikes done 29000miles and I've done 25000 of those miles and the carbs nev...	gooner78	4	1899	Jun 22, 2014 by Luke
	Porto tuned DTR stats. (Preview) Thought i'd share, I know a few people will be interested Porto tuned DTR running a TZR gearbox and cylinder, with custom hand made pipe etc. 158kmh/98mph on the first test run, his best on the day was 164kmh/102mph. One of these best speeds on a similar DT is 170kmh which = 105.6mph. Confirmed via vario...	Energized	2	1788	Apr 26, 2014 by AndyYam
	zeeltronic setting pv (Preview) Ok finally had time to get on with my bike , snapped the thread on the choke so can't start it My cdi came without the powervalve set up, so have come to the conclusion that 100% is closed and 0% is open, there are so many settings I don't understand yet, but help a...	the only way is YAMAHA DTR	21	3127	Mar 27, 2014 by the only way is YAMAHA DTR
	Seafoam-ing a DT125 (Preview) Hey guys! Tried searching around for any topics regarding using Seafoam on a DT125, and it hasn't been talked about before. Anyone had any experiences with this? I have a can of it, and was thinking what was the best way to use it. (eg. in a tank of gas, crankcase) Would greatly appreciate all thoughts	M4rcust	16	2096	Mar 14, 2014 by DT-R_bradders
	vforce reeds for the dtr (Preview) which of the latest v force reeds would fit the dtr engine? thanks	Sukiz	7	1987	Mar 14, 2014 by the only way is YAMAHA DTR
	bike revving by itself after rebuild ( 1 2 3 ) (Preview) Rebuilt this engine twice now and it's got the same problem, I rebuilt it because it revs by itself as soon as I start it, goes all the way up to about 5k and then dies when you turn choke off. If you put it on about half way I can get it to settle but it sounds like it wants to die. Everything's been tightened a...	mr karnage	73	7251	Feb 17, 2014 by mr karnage
	Silicone Hoses and Fuel Lines?? Hose sizes fuel line sizes (Preview) so gonna be replacing all my hoses and fuel lines but before I go out and measure up al the hoses and lines does any one know the info so I can order em without doing so?? A lot of fanny arsing around and surely some you lads have replaced em all not so long ago so hoses, any one know the sizes of hose I'm gonna be n...	Reef	24	2768	Feb 6, 2014 by Rwszc
	what are these an what do they do (Preview) http://imagizer.imageshack.us/v2/800x600q90/839/1i0g.jpg	dan28	7	1928	Feb 2, 2014 by Calum122
	Maximum bore (Preview) What is the maximum bore size for the 3mb cylinder?I see that the biggest piston i found is+1.50mm.On the other hand for the 3bn is 58.40.Is there any difference in the pistons? Can i use the 58.40 piston to the 3mb cylinder?	gasto	20	9280	Jan 29, 2014 by Sam M
	yz airbox to carb (Preview) Has anyone done this? Had this idea for a long time Basically when you fit a bigger carb you need a bigger airbox to carb rubber, the rear spigot is 60 mm and a yz125 88 measures 60mm So may try thi, can screw to airbox,	the only way is YAMAHA DTR	9	1981	Jan 20, 2014 by the only way is YAMAHA DTR
	stan stephens stage 3 on 4fu (Preview) thinking about sending my top end off to stan for a full stage 3 and the crank for a rebuild just for peace of mind, has anyone else had a stage 3 done and what sort of gains did you notice from it? will be fitting racing reeds too and already have a giannelli full system	seancullen	24	3393	Jan 18, 2014 by Energized
	reed petals? (Preview) can anyone confirm if the standard reed petals on 2001 dt125r are metal or plastic? not sure if the spare one i have is aftermarket ? it is clear plastic? i have read conflicting reports that they are metal on some and plastic on others(standard) any pics please if you can confirm what it should look lik...	dread123	16	2609	Jan 4, 2014 by dread123
	Clutch problem! (Preview) Alright guys i've got myself a major head scratching problem, basically my clutch cable snapped the other week so i've now replaced that, but first of when i've adjusted all the tension to max asin the one's by the lever and down by the hook it's still not engaging the clutch fully! took apart the clutch...	Nathlaad	16	2341	Nov 12, 2013 by Dt Danny
	Dammmm (Preview) [IMG]https://i1250.photobucket.com/albums/hh540/Ezegreenfingers/0c89f46d11c5...	ezegreenfingers	12	2036	Nov 1, 2013 by AndyYam
	Slob's Ebay scavenging engine project. (Preview) Well I have been looking for a new DT to do over the winter but no luck, just a load of chav ringer "offroaders" with no documents ect. So I have set myself a challenge as I have missed the mechanical side of things recently after last winter. This may be a pritty bad idea but we will see how it goes...	slob	0	1284	Oct 23, 2013 by slob
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