Smithy95

Guess I'm waiting for the mechanic then since my dad won't let me touch the carburettor even though it's my bike haha, I have to learn some day! Thanks for the quick reply though I'd assumed it would be something like that just annoying I can probably fix it myself but can't!

Sorry to bring this back up but now after sitting for a few days, the bike is leaking petrol out of the float bowl overflow tube thingy whenever the fuel is set to on or reserve. It will leak whether the bike is vertical or on the side stand irregardless. I did have it running for about ten minutes, turned it off went to get my gear on and noticed a pool of petrol, it isn't just a small leak it's literally streaming out. :/

Ahh okay well thanks a lot for all of your help, it's running fine and idling nicely apart from it being a little loud.

I can't quite remember what he told my dad. He did say he's going to have a look at it when he's back cause he's noticed it sounds loud and I completely agree with him there. Hopefully nothing too serious I was on it today and it did get into speed onto e national speed limit but was quite slow getting there. Does a seize mean it won't start at all, or can it seize for a short while then work again but slightly faulty? If so i think it may have done that when the first incident happened.

After hes replaced the seal I seem to have lost quite a lot of acceleration in 4th and 5th and even 3rd. Could it have caused problems whilst it was broken?

You were right straight away by the way, it was a blown crank shaft seal when he rebuilt that part he must've nicked it cause he took the blame. He's replaced the seal but says it still sounds funny and wants to have another look at it after he's back from holiday, can a blown crankshaft seal cause engine problems?

Now the choke lever won't stay in the on position it just drops back down by itself.. Why could this be happening?

Okay I'm not very comfortable opening all of that stuff yet and my dad thinks it would be unwise for me to try, even though I want to! So were sending it back to the mechanic later on this week and we'll see what he has to say, I'll let you all know.

My dad has come home and thoroughly checked over a lot of it, the only real problem now is that it won't idle without the choke on, it tries to then just dies..

Ok I'll give that a go in the near future, so if it's running lean it'll be a light browny colour rather than what it is at the moment?

Here is a picture of the spark plug http://s1291.photobucket.com/user/Csmithyy95/library/ there's two of them I think that should work.

Okay I bought he bike about 2weeks ago if any help. I've also got a little update, just tried to get it running, took absolutely ages, way too many kicks and once it was running the choke is all off. When the Choke is on, it's idling at 1.4 to1.5 but if you rev it lingers at about 3k before dropping back down to 1.4ish. When the choke is supposedly off according to the manual, the bike for some reason revs up to 5k, stays there for a while then slowly drops to idle before cutting out. Oil checked and is fine nowhere near low, checking fuel? There's enough and nothing's leaking overnight it's just been filled with standard unleaded less than 20 miles ago.

Me, very little, my dad however has rode bikes and sorted them all his life and has known the mechanic we bought it from for a long time. Of course when I got it back home though everything sounded normal so he's unsure and the noise is a weird one to describe. Yeah it stalled at a set of lights, I got it going but sounded very strange, so I turned it off then tried to kick it up again but it didn't work for about 5 minutes which it eventually started but still sounded bad. I decided to ride it home slowly and the noise did go. I assume the mechanic did fill it up with 2 stroke oil, it's been a family business for a long time so he's also been a mechanic all his life. The bike was cold but the way, the temperature gauge hadn't moved and I'd literally done about 1mile before it happened.

Have done, okay I'll have a look at all the fluid levels but he mechanic did say he'd checked everything throroughly and topped anything up that needed it. Any other ideas? The only way I can describe the noise is like imagine a wet leaf stuck between your brakes and back wheel on a bicycle.

Hi everyone just recently bought an 01 Yamaha dt125r and I'm loving it despite a small little problem. Anyway I'm happy I found this forum seems likes good place for banter and help.