Weird problem with my RS125

Rim0r · L Plate Warrior Joined: 11 Sep 2004 Karma :

hi guys, this is my first post here and i'm hoping you guys can solve my problem. I think it might be something to do with the carb but i'm not sure and I don't know how to clean it so before i do anything i'm gonna ask you lot Razz

OK, so heres the problem.
After warming the bike up i take it out for a spin and it will not rev over 9000rpm it coughs and stutters. I then (only once) took it out without warming it and this problem wasn't there. A friend i have spoken to suggested it could be the carb needing cleaning but i'm not sure how to do this. Any advice will be greatly appreicated. Thanks

Rob

Kickstart · The Oracle Joined: 04 Feb 2002 Karma :

Hi

First thing to try is a new spark plug. Give that a go and if that fails it is worth looking further.

How old is the RS125?

All the best

Keith
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MarsBar · World Chat Champion Joined: 21 Aug 2002 Karma :

And make sure you get the right one! My NSR had the same problem when I first had it. It was because the previous owner had but a high performance plug in it.

Rim0r · L Plate Warrior Joined: 11 Sep 2004 Karma :

Ah ok, thanks guys... the RS is a 94 model so its a good 10 years old

What plug do you guys recommend?

Cheers

Rob

stevo123 · Nitrous Nuisance Joined: 10 Aug 2004 Karma :

Take the carb off, grab a notebook and pen and set aside a good few hours. Take the carb fuel filter off the side first and clean with petrol. Strip it down slowly taking lots of notes. Clean each part individually. When you just have the carb body left blast any drillings with good ole carb cleaner. Then get a bucket/sink of hot soapy water and clean the body of the carb, an old toothbrush may come in handy here, when your satisfied dry thoroughly and re-assemble it using your drawings. Have fag and/or cuppa (optional). Put back on the bike and check it over. Start her up, give yourself a pat on the back and grin at the great throttle response etc etc. If i don't work carbs prob worn-get a replacement one. Above all take your time and be safe petrol very flammable lol Smile

Lee_367 · Brolly Dolly Joined: 22 May 2004 Karma :

It could be the powervalve, does it have one? is it correctly adjusted?
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Kickstart · The Oracle Joined: 04 Feb 2002 Karma :

Hi

I did have ignition problems with my RS (a 1993 one) that meant it died at about 9500rpm, but it was never fine in that conditipn.

Spark plug is the most likely, and it should be a BR10EG plug.

Also worth cleaning the carb out. The filter in the carb is a bit of a pig to get out without damage on the 34mm carb you have,

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

alains · World Chat Champion Joined: 08 Jul 2004 Karma :

NGK BR10EIX https://www.sparkplugs.co.uk
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Rim0r · L Plate Warrior Joined: 11 Sep 2004 Karma :

ok, i'm gonna see if i can find one tomorrow? failing that i'll have to use my dads card Razz

cheers

Rob

alains · World Chat Champion Joined: 08 Jul 2004 Karma :

they will send the same day , it takes 3 days to come in france and much cheaper
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the worst day fishing is better than the best day working