DT125R ARCHIVE

yamahadt125 · DTR Senior Member

my new bike yamaha dt 125 re 2007

Energized · DTR Legend

Nice standard RE that is man biggrin

Looks clean! wink

Where you from etc?

Welcome to the forum! biggrin

Calum122 · Guru

Nice dude.

Get that bike to how yamaha intended i.e. no restrictions. Derestricting the re is very easy and worthwhile. Not only will it be better for the engine but it will also be better to ride.

13'000 is enough mileage for a top end rebuild so consider gettong the top end off and sorting out any issues there before real problems occur. Other than that looks real good

Lots of good guys on here ans lots of info too!

yamahadt125 · DTR Senior Member

I did think about doing a top end rebuild because they say that it should be done at 10,000 miles but it runs so smooth and starts hot or cold on the button confuse

Calum122 · Guru

Yeah. Have a look up the exhaust port and have a look at the condition of the bore and rings. That'll tell you evertything you need to know.

yamahadt125 · DTR Senior Member

I guess but then i have to pull it all apart.... i might just leave it and use it untill it starts to knock which means need new piston and rebore or it will blows up hmm it all depends if it been race around by previous owners it might last till 15,000 or more smile

Calum122 · Guru

No mate. It's two nuts on the exhaust studs. One on the expasion chamber and another one further up. For the sake of 15 mins and four bolts you're telling me you'd rather have the engine rebuilt than check to see it's condition. Yeah good one.

At very least take the spark plug out and have a look at it. The spark plug will tell you everything you need to know about how the bike is running. 15 minutes to check up the exhaust port will tell you what condition it is in.

yamahadt125 · DTR Senior Member

But how would you be able to see the condition of the bore and rings from the exhaust port its so small to look up ?? hmm i could do a compression test ?

MDK · DTR Legend

its easy to see the piston and rings up the port with a little light saves taking the head off .

yamahadt125 · DTR Senior Member

I did a compression test on my dt and it was just over 100 psi ? is this a good reading for compression

Calum122 · Guru

You can see all you need to up the exhaust port. Scoring will be evident.

yamahadt125 · DTR Senior Member

I looked in the exhaust port its looks alright its a little hard to tell looking in a small hole. but it might be a little bit scored just little lines but other that finee!!

lmgtfy.com/

-- Edited by yamahadt125 on Tuesday 27th of August 2013 01:07:15 PM

yamahadt125 · DTR Senior Member

Mein besonderer Freunde und Ich mag zu zufällig Flugzeuge schießen

Calum122 · Guru

Hhmm. Get a torch and some photos up matey.

Remember that crosshatching along the bore is suppose to br there.

MDK · DTR Legend

I smell sarcasm in here ?

yeah light and pics would be good hard to give any help or info with out seeing a good pic .

yamahadt125 · DTR Senior Member

danke für die Antwort

I did not know what you ment, I was trying to look at the piston throught the hole!

The piston does have some little marks on it, but they may be nothing but they could be cracks? Little lines between rings and at top and bottom edges?

I now realise you mean look at the bore so I lowered the piston and I can see the bore, its looks good and the " crosshatching " still looks visable.

I hope this means that the piston will go for a little longer......I tried to take picture but I don't think you will see anything as they do not look very clear

Maybe I should plan to change piston in future.

Zum Wohl!