DT125R ARCHIVE

NEV · NEV

DT125R CRANKSHAFT AND PISTON[URL=http://imageshack.us/photo/my-images/513/crankshaftandpiston2.jpg/]...

NEV · NEV

DT125R CRANKCASE COVERS BOTH SIDES[URL=http://imageshack.us/photo/my-images/36/crankcasecover2.jpg/][IMG]http://im...

NEV · NEV

DT125R CRANKCASE[URL=http://imageshack.us/photo/my-images/339/crankcase2.jpg/][IMG]http://img339.imageshack.us/img339/...

sindre98 · sindre98

hi is it possible to change crank shaft seal on clutch side without splitting engine? and should my gearbox oil be green? always have been in my time of owning just wondering since the oil i put in was yellow-ish and transparent

The_DtR_Maniac1991 · The_DtR_Maniac1991

Hi guys, my dt 125r struggles to start, takes about 30 kicks to start, when it starts, it revs up on its own, (had carb ultro sonic cleaned and set up.) not carb issue ruled that one out, would the crankcase seals cause this problem if they are buggered, am i right on thinking air is being sucked in from cran...

dan28 · dan28

finally got the engine apart seems as if the crank bearing has seized I cant spin it by hand some of the chrome on the crank has flaked off as if its been rubbing

tomimsmith1992 · tomimsmith1992

He lads had a tapping noise in what i thought was my top end piston slap so i had a re-bore and fitted a makita piston kit with RIK rings and the tapping noise has remained. the piston was supplied by me and given to the shop with the barrel with the correct clearances. The ring end gap is within spec also. u...

SMurF_12 · SMurF_12

Are they any better cranks available for a dt125r ??

stillbroke · stillbroke

hi i took my top end off and can work out if water was already in the bottom end or its leaked into it any ideas?

superted · superted

I have bought an Athena 170cc kit and I am having it ported and I have been told my crank may not take it well lol just woudering if I can buy a racing crank or an uprated crank or cand do stuff to my crank to make it better and if so where to buy from thanks

stillbroke · stillbroke

as above

zooankski · zooankski

I did read how somewhere on the forum once before but now can't find it! can anyone give me instructions?

tunertom · tunertom

surely this is not suppost to be there? it hasnt punctured the inlet so i dont think itll cause an air leak, but ill seal it up with hot glue in layers just in case looks like a very neat cut tbh, dont know how it got there, just noticed it while i was cleaning my engine. [IMG]http://i50.tinypic.com/v8e...

stillbroke · stillbroke

as above ive got both seals but i cant make out which is the right and which is the left

gareth_iowc · gareth_iowc

hi all, i bought a 1986 yz125 engine (1lx) for my dtr. and It needs a complete re-build. The crank that is in it has been damaged and needs replacing. any suggestions on where to look and what makes to look for? did have a little search but came up with nothing. could a newer crank be used? Many thanks

zooankski · zooankski

I have noticed i appear to have a little bit of play in my l/h main bearing which i have replaced? The engine was totally overhauled with every bearing changed and yesterday while trouble shooting some running issues with it i noticed a bit of play if i grab the flywheel. Looks like another strip to see w...

superted · superted

hi does any body know the part number for a 2002 dt125r conrod kit plz

zooankski · zooankski

http://simplybearings.co.uk/shop/Seals-Viton+Rubber/c19_4462/index.html

Slinky · Slinky

In the middle of an engine rebuild and have found the crank has some surface water damage or similar. Will this effect the engine if just cleaned up? I have a spare tzr 125 bottom end - should and could I use the crank out of it? I have new crank bearings, seals, gaskets and conrod set to go in.

gooner78 · gooner78

Do they need much running in compared to just a new piston as i will be starting a running in period on my rebuilt engine this weekend the bike has a nikosil cylinder and single ring piston and i have been told to do 3 heat cycles and and a few gentle rides to ease the piston in but what about main bearings and n...

NORFE · NORFE

crank seals... HAS ANY ONE NOTICED THAT ALL THE CRANK SEALS THAT SHOPS ARE PROVIDING ARNT THE RIGHT ONE FOR THE RIGHT HAND SIDE IT SHOULD BE A TWIN SPRUNG RING ON THE INNER AND OUTER, NOW THE LAST 3 SEAL SETS IV BOUGHT HAVE BEEN THE NORMAL TWIN LIP WITH JUST THE INNER SPRUNG LIP THIS IS WHAT WAS RONG WITH MINE T...

zooankski · zooankski

I am waiting for my rebuilt crank back from PJME and thought it wise to get some advice on bearing and crank installation. I intend to warm the case halves with a heat gun and drop frozen bearings in which i have done for all the other case bearings with no issue. When it comes to installing the crank though...

zooankski · zooankski

Where is the cheapest place for crank bearings these days?

coastie123 · coastie123

Right guys I've been plodding along on me bike for the last 2 weeks and I've know knocked up 120 miles on it... I put it on my ramp the other day and checked all my oil levels etc and I noticed my g/box oil was green!! Now the awkward thing is my coolant is green and I'm also using green 2 stroke!! Befor...

gooner78 · gooner78

How much sidways movement should there be on a con rod as my wre 125 has just started making a rough noise from the bottom end i took the cylinder off and theres loads of side ways movement on the con rod i,m talking 1.5mm of movement either side but there was no up and down movement on the rod though :confuse...

Topic		Started By	Replies	Views	Last Post
	STICKY: DT125R CRANKSHAFT AND PISTON - PARTS BREAKDOWN (Preview) DT125R CRANKSHAFT AND PISTON[URL=http://imageshack.us/photo/my-images/513/crankshaftandpiston2.jpg/]...	NEV	0	1477	Jun 25, 2012 by NEV
	STICKY: DT125R CRANKCASE COVERS BOTH SIDES - PARTS BREAKDOWN (Preview) DT125R CRANKCASE COVERS BOTH SIDES[URL=http://imageshack.us/photo/my-images/36/crankcasecover2.jpg/][IMG]http://im...	NEV	0	1494	Jun 25, 2012 by NEV
	STICKY: DT125R CRANKCASE - PARTS BREAKDOWN (Preview) DT125R CRANKCASE[URL=http://imageshack.us/photo/my-images/339/crankcase2.jpg/][IMG]http://img339.imageshack.us/img339/...	NEV	0	1418	Jun 25, 2012 by NEV
	changing crankshaft seal without splitting . clutch side (Preview) hi is it possible to change crank shaft seal on clutch side without splitting engine? and should my gearbox oil be green? always have been in my time of owning just wondering since the oil i put in was yellow-ish and transparent	sindre98	2	1678	May 24, 2015 by Calum122
	Crankcase seals? (Preview) Hi guys, my dt 125r struggles to start, takes about 30 kicks to start, when it starts, it revs up on its own, (had carb ultro sonic cleaned and set up.) not carb issue ruled that one out, would the crankcase seals cause this problem if they are buggered, am i right on thinking air is being sucked in from cran...	The_DtR_Maniac1991	8	1818	Feb 27, 2015 by Calum122
	whats wrong here (Preview) finally got the engine apart seems as if the crank bearing has seized I cant spin it by hand some of the chrome on the crank has flaked off as if its been rubbing	dan28	3	1572	Dec 5, 2014 by AndyYam
	Tell tale signs of a bad con rod or bearings Con-rod bent? Tapping noise ? (Preview) He lads had a tapping noise in what i thought was my top end piston slap so i had a re-bore and fitted a makita piston kit with RIK rings and the tapping noise has remained. the piston was supplied by me and given to the shop with the barrel with the correct clearances. The ring end gap is within spec also. u...	tomimsmith1992	12	1898	Sep 2, 2014 by Calum122
	uprated crank?? (Preview) Are they any better cranks available for a dt125r ??	SMurF_12	16	1993	Nov 10, 2013 by Jesse_DT
	water in bottom end once top end removed? (Preview) hi i took my top end off and can work out if water was already in the bottom end or its leaked into it any ideas?	stillbroke	18	2513	Sep 4, 2013 by MDK
	crank shaft (Preview) I have bought an Athena 170cc kit and I am having it ported and I have been told my crank may not take it well lol just woudering if I can buy a racing crank or an uprated crank or cand do stuff to my crank to make it better and if so where to buy from thanks	superted	8	1675	Jul 22, 2013 by Calum122
	can i remove the right hand crank seal without removing the clutch? (Preview) as above	stillbroke	12	1995	May 2, 2013 by stillbroke
	L/h crank seal replacement guide (Preview) I did read how somewhere on the forum once before but now can't find it! can anyone give me instructions?	zooankski	10	2019	Apr 24, 2013 by dread123
	Inlet cutout? surely not suppost to be there? (Preview) surely this is not suppost to be there? it hasnt punctured the inlet so i dont think itll cause an air leak, but ill seal it up with hot glue in layers just in case looks like a very neat cut tbh, dont know how it got there, just noticed it while i was cleaning my engine. [IMG]http://i50.tinypic.com/v8e...	tunertom	7	1739	Mar 23, 2013 by Calum122
	got both crank seals which ones which ? (Preview) as above ive got both seals but i cant make out which is the right and which is the left	stillbroke	11	2039	Mar 19, 2013 by NORFE
	1986 yz125 1lx looking for crank (Preview) hi all, i bought a 1986 yz125 engine (1lx) for my dtr. and It needs a complete re-build. The crank that is in it has been damaged and needs replacing. any suggestions on where to look and what makes to look for? did have a little search but came up with nothing. could a newer crank be used? Many thanks	gareth_iowc	0	1342	Feb 6, 2013 by gareth_iowc
	New engine rebuild crank bearing play (Preview) I have noticed i appear to have a little bit of play in my l/h main bearing which i have replaced? The engine was totally overhauled with every bearing changed and yesterday while trouble shooting some running issues with it i noticed a bit of play if i grab the flywheel. Looks like another strip to see w...	zooankski	5	1595	Nov 18, 2012 by stroker
	conrod kit (Preview) hi does any body know the part number for a 2002 dt125r conrod kit plz	superted	2	1613	Nov 18, 2012 by superted
	Crank seals (Preview) http://simplybearings.co.uk/shop/Seals-Viton+Rubber/c19_4462/index.html	zooankski	1	1893	Nov 18, 2012 by NORFE
	Crank damage - keep or replace? (Preview) In the middle of an engine rebuild and have found the crank has some surface water damage or similar. Will this effect the engine if just cleaned up? I have a spare tzr 125 bottom end - should and could I use the crank out of it? I have new crank bearings, seals, gaskets and conrod set to go in.	Slinky	10	2027	Nov 2, 2012 by NORFE
	running in new main bearings and new crank (Preview) Do they need much running in compared to just a new piston as i will be starting a running in period on my rebuilt engine this weekend the bike has a nikosil cylinder and single ring piston and i have been told to do 3 heat cycles and and a few gentle rides to ease the piston in but what about main bearings and n...	gooner78	12	1578	Nov 1, 2012 by AndyYam
	CRANK SEALS (Preview) crank seals... HAS ANY ONE NOTICED THAT ALL THE CRANK SEALS THAT SHOPS ARE PROVIDING ARNT THE RIGHT ONE FOR THE RIGHT HAND SIDE IT SHOULD BE A TWIN SPRUNG RING ON THE INNER AND OUTER, NOW THE LAST 3 SEAL SETS IV BOUGHT HAVE BEEN THE NORMAL TWIN LIP WITH JUST THE INNER SPRUNG LIP THIS IS WHAT WAS RONG WITH MINE T...	NORFE	10	2402	Oct 31, 2012 by NORFE
	Crank installation (Preview) I am waiting for my rebuilt crank back from PJME and thought it wise to get some advice on bearing and crank installation. I intend to warm the case halves with a heat gun and drop frozen bearings in which i have done for all the other case bearings with no issue. When it comes to installing the crank though...	zooankski	3	1546	Oct 2, 2012 by NORFE
	Cheapest place for crank bearings (Preview) Where is the cheapest place for crank bearings these days?	zooankski	9	1510	Sep 9, 2012 by NORFE
	Possible head gasket, crank seal or water pump!!! (Preview) Right guys I've been plodding along on me bike for the last 2 weeks and I've know knocked up 120 miles on it... I put it on my ramp the other day and checked all my oil levels etc and I noticed my g/box oil was green!! Now the awkward thing is my coolant is green and I'm also using green 2 stroke!! Befor...	coastie123	14	2316	Aug 6, 2012 by coastie123
	Con rod play (Preview) How much sidways movement should there be on a con rod as my wre 125 has just started making a rough noise from the bottom end i took the cylinder off and theres loads of side ways movement on the con rod i,m talking 1.5mm of movement either side but there was no up and down movement on the rod though :confuse...	gooner78	10	1600	Jul 30, 2012 by NORFE
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