DT125R ARCHIVE

Calum122 · Guru

dtr wont start

DTR-POWERVALVE-FTW · DTR Respected Member

dtr wont start and it bubbles in header bottle and plug is wet so basicly headgasket ye

Cameron · Guru

If it's bubbling in the expansion bottle means it's pressurising it, definitely HG.

-- Edited by Petrol_head on Sunday 27th of May 2012 08:05:20 PM

NORFE · DTR Trusted Engine Builder

yep

DTR-POWERVALVE-FTW · DTR Respected Member

headgasket was done but was a pattern part....not a rubbercoated yammy....

NORFE · DTR Trusted Engine Builder

u want 1 of these sets i got looks spot on no cheap tat

http://www.ebay.co.uk/itm/270937032877?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649#ht_1078wt_968

Calum122 · Guru

NO! You're making an assumption. OK so the most likely cause IS the Head gasket. But based on the what he had given me. Could be various.

He could have a crack in the cylinder causing the water to vapourise.

The water pump could be nakered causing water to stay put, boil and vapourise.

The cooling system could be blocked, not letting cold water replace the hot water fast enough, causing the water to boil and vapourise.

Don't put it in the 'I don't know what's wrong' section if its not up for debate. Or you don't want help.

Calum122 · Guru

Petrol_head wrote:
If it's bubbling in the expansion bottle means it's pressurising it, definitely HG.

-- Edited by Petrol_head on Sunday 27th of May 2012 08:05:20 PM

Like I said, not necessarily.

Head was warped on my DT. Water was leaking through the gasket and my DT started up no problems.

Calum122 · Guru

Just buy genuine. No point taking risks. If you're sure its the Head gasket.

http://www.yamahascooterspares.co.uk/spares/partImage.asp?GPN=Z8GS666%3D65755&uid=0

It's not a lot. £12. Done.

NORFE · DTR Trusted Engine Builder

http://www.ebay.co.uk/itm/NEW-GENUINE-YAMAHA-DT125R-RE-HEAD-GASKET-3BN111810200-BEST-QUALITY-/190679049819?pt=UK_Motorcycle_Parts&hash=item2c655b665b#ht_808wt_952

DTR-POWERVALVE-FTW · DTR Respected Member

thanks lads ive ordered a yamaha one and sent bike to a garage so he will make sure its all sweat eg check head if its slightly warped see if can sand it levelhopefully fingers crossed it aint :)

Calum122 · Guru

DTR-POWERVALVE-FTW wrote:
thanks lads ive ordered a yamaha one and sent bike to a garage so he will make sure its all sweat eg check head if its slightly warped see if can sand it levelhopefully fingers crossed it aint :)

WTF? The point in these forums is to try and save you some money! By helping you help yourself. It's always worth skimming the head anyway to remove any left over gasket. It's like a 5 minute job the way I do it. That's no exaggeration. When everything is prepared it's literally moving the head in circles then the same with the cylinder. You can visually check to see if the cylinder was cracked. You could test to see if it was the water pump. You could have flushed the coolant to make sure there were no blockages. Very simple things to check to diagnose the problem. But if you're happy sending it away then that's different matter entirely.