DT125R ARCHIVE

threadsta · DTR Senior Member

Coolant leaking :(

fused420 · DTR Senior Member

Calum122 wrote:
You'll want to skim that head and cylinder too mate!

You would only need to skim if the barrel/head is warped or damaged.

Place a metal ruler over both cleaned up sufaces and if there is a gap big enough to fit a fag paper through, then skim the head/barrel.

-- Edited by fused420 on Monday 21st of January 2013 06:03:18 PM

tripr · Guru

check the head that its flat by smearing oil on it an putting the head put it flat on a piece of glass check the oil smear to see it covers everywhere where the gasket will be . for the skimming you can do it yourself attach the head to a drill via a socket an the spark plug put some grindin paste on your surface some fine grinding paste on a completly flat clean surface . an spin the head on the drill at a slow speed keeping the head flat against your surface

personally mine have been ok without skims an iv blown a coolant cap many of time buyin up cheapy white gaskets before i learnt yours will probably fix with just a good quality gasket too

well done nev you beat me typing that up there only cos my takeaways just arrived mind lol

-- Edited by tripr on Monday 21st of January 2013 06:13:51 PM

threadsta · DTR Senior Member

So I rode my bike to college this morning and realised there was liquid dripping underneath my bike, got home and filled up the coolant and replaced the engine oil and it's still dripping.
Does anyone know if the coolant pipe from the radiator to the overflow tank runs through the frame? Cause I think I might have a hole in my frame by where the sidestand is which could be the dripping. Any help will be greatly appreciated, need to use my bike this week and don't want to keep buying coolant :(.

Calum122 · Guru

Yeah it is on the older bikes.

Have a look at your expansion bottle.

ToySoldier · DTR Legend

there is a pipe running from the top of the rad to the expansion bottle then there's a overflow pipe that runs into the frame runs down the inside to the bottom and out the bottom.

check the coolant for a rainbow effect if its coming from the overflow its most likely the head gasket has gone

threadsta · DTR Senior Member

The one behind my left panel at the back? can't see anything wrong with it, it's all running from somewhere and dripping off of the suspension links.

threadsta · DTR Senior Member

Thanks for the info, I just went out to check my coolant and it's all already gone since I put it in earlier :@

tripr · Guru

usually a sign the head gasket gone m8 itll still work you just gotta keep topping it up, but obviously its best to sort it out by replacing the head gasket soon as poss

as they say the expansion tank overflowing, water by the swingarm anywhere, maybe routed somewhere other than mine tho

Calum122 · Guru

Definitely sounds like head gasket.

And you haven't noticed the temperature going up mate?

Good way to see if it's the head gasket. Have a look at the radiator. Put your fingers in there. If you've got loads of black oil on your hands then it's head gasket.

You'll want to skim the head and barrel and make sure you buy GENUINE HEAD GASKET!

Also if you've been running it with no coolant then you'll most likely warp the head.

Calum122 · Guru

You'll want to skim that head and cylinder too mate!

threadsta · DTR Senior Member

Sorry if i'm being stupid but what do ya mean by skim? lol

Calum122 · Guru

Its a two second job and an easy way to remove all the gasket from the cylinder and head.

NEV · Guru

It may or may not need skimming Threadsta, depending on whether or not your heads become warped due to the heat, a way I use to check if a head is warped or not is to get a piece of glass or Perspex then smear some oil onto the glass, then place the head on the glass, look from the underneath at where a gasket would sit on the head and see if theres a continual ' gasket'so to speak, if its broken anywhere it means the heads warped, if not, then you're lucky.another way is to use a straight edge on the head, but that's only visual and not as good as the oil testing way, Btw when you do come to replace the gasket and you've torqued the head down to the correct settings, give it a blast for a few miles say 10-15, then re-torque the head down again.

threadsta · DTR Senior Member

Oh I know what you mean by skimming now! Thanks for all the help guys, i'll check if it's warped tomorrow and skim it if it is. And i'm quite happy to take it for a 10/15 min blast ;) do the nuts come a bit loose after riding or something? Anyone know if halfords will have genuine gaskets?

Reef · Guru

I doubt halfords will have them, pretty sure you'd need to order them in through a yammy dealer or online

tripr · Guru

if im not getting it from the bike shop i usually type in tdr gasket in ebay instead of dtr gasket the search gives you the better quality gaskets

http://www.ebay.co.uk/itm/DT125R-DTR125-CYLINDER-HEAD-GASKET-SET-TOP-GASKET-SET-/190786563453?pt=UK_Motorcycle_Parts&hash=item2c6bc3ed7d

threadsta · DTR Senior Member

Didn't think they would :/ I need to be back on the road asap though, i'll go down to fowlers tomorrow they'll definitely have one.
Nice signature pic btw reef!;)

Reef · Guru

Thanks matey, I took it the other day ;) .......I joke lol

Calum122 · Guru

Most people order them in mate. You should be alright. I rode for about a month before I sorted the gasket out. Just meant I had to skim the head.

NEV · Guru

reef wrote:
Thanks matey, I took it the other day ;) .......I joke lol

At least put it to good use Reefy lad

Reef · Guru

Haha didn't see the writing at first, thought at first you meant something else then lol ;) haha

ToySoldier · DTR Legend

fowler's should have one they had a 230 gasket in stock i was well supriced lol

threadsta · DTR Senior Member

Got a gasket from fowlers today and put it in, been out for a little ride and no leaking so far let's hope it stays that way! lol

Steady Eddy · DTR Senior Member

Just as a mater of interest Threadsta Lad , how long did it take you to do the job ,

threadsta · DTR Senior Member

Not sure really was home from college about 11 to start. Got the panels, seat, tank off then spent some time cleaning my 2 stroke tank. Then had to go out and buy the gasket. Finished about 3 but did other things during.

Steady Eddy · DTR Senior Member

Oh not long then , sound job hope all's well with it now ,

threadsta · DTR Senior Member

It broke again this morning, so pissed off just want a new bike now. Anyone know how much i should get for it as for parts/not working?

Calum122 · Guru

Whats the matter with it now?

threadsta · DTR Senior Member

Doing the same thing again, finished fixing it this afternoon for the 3rd time and it broke again on the way back from work 10 mins ago. What happens is whenever I go over 5/6 thousand revs it starts cutting out and I can keep it running if I rev it higher but when it dies it will start straight after. I think it might not be igniting properly or something? I've taken the plug out and it's covered in petrol.