Justarn Posted May 6, 2018 Posted May 6, 2018 Hey all, a pal bought a 2003 cb500 that's done 40 miles in the last 3 years. In neutral it revs freely to 10k but while moving it coughs and splitters refusing to review past 5-6k?We've checked the carb rubbers, vac and fuel lines, cleaned all the electrical components connections we could find....It's a bit above us I think, any ideas? Quote
Justarn Posted May 6, 2018 Author Posted May 6, 2018 We just removed a piece of sponge from what looks like a cheap Japanese in line screw together fuel filter and it is still spluttering put takes of after 6k now...We are thinking maybe the sponge has broken done a bit and and some sponge is getting through to the carbs... He has just gone up the duel carriage way to give it a thrash and see if it clears it.....Next step is maybe have the carbs off, take the bowls off and have a look... Is brake cleaner ok to blast through the jets? Quote
Justarn Posted May 6, 2018 Author Posted May 6, 2018 Well we went on to take of the carbs and give em a clean, cleaned the fuel tap out.Still the same, Quote
fastbob Posted May 6, 2018 Posted May 6, 2018 I'll go for a stuck float valve or two that doesn't close properly because the rubber tip has dried out and shrunk or gone hard . This could explain why it picks up once the excess fuel is used up . Carb repair kits are readily available. Quote
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