NSR starting problem

fuzz · World Chat Champion Joined: 24 Mar 2004 Karma :

Please help! I can't get my NSR125RX to start at all. Sad

It started when I pulled away from work and felt the bike behaving differently. It didn't seem to have much pull in higher revs. I thought it may sort itself out as it had been cold for a while. A little further down the road, and I lost all power. The engine sounded very growly and eventually gave up completely.

I managed to push it back to where I work and had a look. Fuel seems OK, spark plug was a bit black but I sorted that out and got it sparking again. Compressoin test was OK so I know the piston rings are fine. The airbox was clean. Bump starting had little effect. It sounded like it wanted to go but couldn't for some reason.

Since I had it two weeks ago, I haven't been able to get a level reading from the gear oil window, so I believe it needs topping up, but I fail to see how this will stop it from starting.

Any ideas? Please?

Noggin · Traffic Copper Joined: 27 Feb 2004 Karma :

This happened to mine, I checked the plug and everything, cleaned the plug etc. It turned out that I needed a new plug, so have you tried this?

Also, have you checked the fuel tap is on.

Make sure you hold the bike upright when checking the oil level with the gearbox.

Hope this helps

Craig G(Noggin)
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Current bike: kawasaki zx12r 2002
Track bike: yamaha r6 1998
Old Bike: honda NSR 125 1998

fuzz · World Chat Champion Joined: 24 Mar 2004 Karma :

The plug is only 2 weeks old! It was replaced before it was delivered to me.

The fuel is definately on. If you twist the grip, you can smell petrol.

I am at a loss...

Kickstart · The Oracle Joined: 04 Feb 2002 Karma :

Hi

Difficult to say. The carb on the NSR does not have an accelerator pump circuit so should not squirt any fuel in when you twist the throttle, so twisting the throttle should not make it smell of petrol more.

I would be tempted to say it is running rich. Check the choke is turning off fully and check that the carb float bowl is not overflowing (maybe from the float height being wrong or a piece of grit in the needle valve).

A new plug might well help for a short while with these problems.

All the best

Keith
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