NSR124R 2002 troubles - help needed.

Blunet600 · Nearly there... Joined: 03 Dec 2005 Karma :

My sisters NSR isnt firing up. It sparks on ignition switch but wont turnover. She said she was riding it the other day when it went wrong, she said there was a lack of power and it backfired twice. When she went down a gear to get power there was none still so she went to first and it over revved then when she pulled off it stuttered again with lack of power. And when she got home it just died on her.
any ideas or suggestions?
I check 2 stroke oil and its fine, petrol fine, i gave the spark plug a clean ( which was covered in oil/petrol, was dark in colour) but still no luck. It started to idle for 5 seconds after the spark plug was cleaned but then stopped again.
any help is greatly appreciated.
cheers.
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Honda - Power of Dreams - NSR 125R - Hornet 600

dardappa2004 · Nova Slayer Joined: 02 Mar 2008 Karma :

Buy new sparks plugs, i has same symtoms on my old rs and changed them and ran fine afterwards Thumbs Up

N cee thirty · Banned Joined: 31 Jan 2010 Karma :

Blunet600 · Nearly there... Joined: 03 Dec 2005 Karma :

It is a new spark plug, its only been in there a month or so. I will change it just to be safe and the air filter, cheers.
Any other suggestions?
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Honda - Power of Dreams - NSR 125R - Hornet 600

N cee thirty · Banned Joined: 31 Jan 2010 Karma :

when was it last rebuilt

maybe give the carb a good clean
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'00 Aprilia RS50 > '92 Honda CG > '99 Yamaha Fazer > '91 Yamaha RXS > '79 Suzuki X5 > 01' Honda Cg > 07' Honda Cg > 82' Kawasaki Z200 > suzuki gsxr 400 gk73a > honda vfr 400 NC30 Mod 2 Passed 09/06/2011

Jewlio Iglesias wrote: I actually did vote BNP once

Blunet600 · Nearly there... Joined: 03 Dec 2005 Karma :

Its never been rebuilt. Its done 12,000 miles and has been really well cared for. Good oils etc. Ive never cleaned the carbs so that could be one to try. How much is a rebuild? cheers. any other suggestions?
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Honda - Power of Dreams - NSR 125R - Hornet 600

N cee thirty · Banned Joined: 31 Jan 2010 Karma :

if you do it yourself,could be about £150 for the bore,head and piston
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'00 Aprilia RS50 > '92 Honda CG > '99 Yamaha Fazer > '91 Yamaha RXS > '79 Suzuki X5 > 01' Honda Cg > 07' Honda Cg > 82' Kawasaki Z200 > suzuki gsxr 400 gk73a > honda vfr 400 NC30 Mod 2 Passed 09/06/2011

Jewlio Iglesias wrote: I actually did vote BNP once

Digit · Scooby Slapper Joined: 22 Aug 2010 Karma :

Check fuel tap and tank filter, you might find that the fuel is not getting through to the carb properly.

Roy.
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Happy daze!

stirlinggaz · World Chat Champion Joined: 22 Jul 2007 Karma :

definately buy a NEW plug, its the 1st thing i do on my 2t's as they can go through them quickly...
i'd also be checking the compression & whip the head off, as it sounds like its needing at leat new rings.
cheers,
GAZ

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

i agree about the plug but BR9ECS is bull shit , so buy BR9EIX
other thing , this bike need a maintenance schedule as :
- 7500 miles (or 12000 kms) de-coking plus rings change
- 15000 miles (or 24000 kms) de-coking plus piston-rings change
- 22000 miles (or 35000 kms) top-end change
each top-end openning needs new : base cylinder seal , cylinder head gasket , oil seal (valves shaft) , small end bearing , 2 clips ,piston pin (about £30)
piston is about £31 , rings £22 and a complete top-end £220
i recommand you schedule at least a rings change . but if you want to change the piston you need to dismount the barrel to see what letter is hammered under the exhaust port . see example : https://www.geneva-racing.ch/~alains/lettre.jpg (it's a E) . you must buy piston with the same letter or the same size . pistons size are A to E but if it's a E price is awful and you may fit a D
PS sizes are in the workshop manual
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