A forum for owners of Yamaha TTR250 trail and enduro bikes!

Darren · Veteran Member

Help cutting out in mid-depth water

Cubber · Super Guru

Have a look at where the electrickery stuff is made before getting to the spark generator.
There may be a bare bit of wiring as it emerges from the engine casing which makes a temporary short.
Water and electricity do not mix happily!
Martyn

Darren · Veteran Member

Cheers Martyn for the advise.Just on with that right now, on a coffee break at the mo will get back to you with the results after a depth check.
Cheers Daz

Darren · Veteran Member

Ok. Been through the electrickery bits from bottom to top and greased all the connections but the bitch still cuts out on water at 30cm urghghghghghgh
I'm so frustrated water is the bain of my life at the mo....
Any other suggestions PLEASE
Daz

TTRfan · Super Guru

I am puzzled as to the cause Daz so apologies if I am suggesting the bleedin' obvious wink

Check that the two carb breathers going downwards from the carb from their T junctions still have their one-way valves fitted and that they are working. Suck and blow through 'em biggrin biggrin

I am guessing that no water is finding its way into the oil?

Brian

Darren · Veteran Member

OK Brian
There are 2 sraight pipes going out from behind the carb but there singles and not junction or one way valve is visable....checked and dropped the oil been in the water for nearly 2 months now and when I changed it there was miniscule miniscule signs of water
Thanx Daz
any diagrams of the hoses and t junction and oneway valves
Cheers thats something i can check on

TTRfan · Super Guru

OK - some poor pics in this sequence that might help http://www.ttr250.com/Removing_carb/TTR_carb_removal.htm

The pic below shows the one-way valves:

Carb pipesa.jpg

Darren · Veteran Member

I have nothing like this on my bike Brian
Cheers fella are these available to buy
Daz

TTRfan · Super Guru

Yep - either new from Mr Yamaha or else I got some s/h ones in the spares box.

If you want s/h then perhaps email me offline indicating which number parts you need from the fiche below:

carb fiche.jpg

Darren · Veteran Member

Brian .......Here you come to save the daaaaaaaaaaaaaaay let the water subside and I will order the complete t-junc and all hoses from you. If I order them now, I'm scared they will get lost in the post coz of the floods

getting frustrated with not being able to get parts out here...speedo sensors still not here too three months now bwcause of the flooding

Darren · Veteran Member

Brian you are the GURU.
I don't have the hose and oneway valve set up on my bike so I thought I would take the two staight hoses off and try the bike without and guess what no cutting out whatsoever. So can you explain why without these hoses on it's cutting out and can it be used without until i can get some replacements. Sorry for the grief fella.
Cheers Daz

TTRfan · Super Guru

Darren wrote:
So can you explain why without these hoses on it's cutting out

Hi Daz - good to hear you have found the cause of the cutting out.

In your sentence copied above, have you missed out a "not"? Otherwise I am confused - easily done confuse

On may bikes with trailing carb breathers, problems can be caused by water blocking them and they are routinely re-routed into the airbox on WRFs and KTMs.

Brian