New Member says Hi & begs help!!!

[Clueless Dad]

Hi Everyone

I have just joined this club in the hope that someone here can help me out!

I don't have a bike of my own at the moment but my son has two - a new Derbi which he regrets buying (no fun) and an 02 DT125R which he has just bought for fun - and has provided very little so far!!!!!

He has had the bike for about a week now and for the first 3 days he was over the moon, but then noticed that as it "hit the power-band" it started to struggle and sounded like it was miss-firing. It also became difficult to start. This increasingly worsened until last night it died on him at traffic-lights and ended up coming home in the back of a van.

I am not the greatest mechanic in the world, but believe it likely to be one of the following:

Blocked Jet

Water ingress (it was raining hard yesterday)

Electrical fault

The bike has had after-market bits fitted by the previous owner including a DEP exhaust and power valve modification but this is all a different language to me who has only ever owned four strokes.

Could anyone point me in the right direction to try and get his pride and joy running again please - I cant be doing with any Kevin and Perry crap

Thanks

[Airhead]

_{Nice intro Dad}

_{Lets start with a spark then, has it or hasnt it?}

_{have you checked for spark yet? and done the usual with WD40, spraying around the plug cap etc?}

[Clueless Dad]

Hi Airhead

Thanks for the welcome and quick response!

I sprayed WD40 around suppressor cap yesterday before he went out due to the poor starting, but haven't done anything yet today as I'm at work, so I guess this will all be homework tonight

[blackhat250]

Welcome Clueless " you say rained hard,, was the bike outside ,or garaged,, drain the fuel also , see if water ingress, if inline filtre , change too.

[Clueless Dad]

Hi Blackhat

The bike is covered on the drive, but has been used to being garaged in the past.

Removed and checked the plug last night which was in a bad way, so replaced it and bike is firing fine now .

Hopefully that is the end of this little saga but I have no doubt that I will be needing advice again!!!

Thanks to both you and Airhead for your interest

[mervin]

Make sure it has the correct plug, you will have no end of p[roblems if it has the wrong plug, if it was bought secondhand do not assume it has the correct plug fitted when you buy it