RZV500R TM28 Carburettor Problem

[rd84]

Hi,

My RZV500R has developed a problem on one cylinder - it wouldn’t tickover at idle - I found the top left rear cylinder exhaust was cold with a cool low energy exhaust pulse.... I checked in the carb and there was a greyish grit in the bottom of the float bowl and 1 piece of grit in the pilot jet - having cleaned this out and squirted carb cleaner through the carbs passages I put it back together- the bikes tickover was ok after this but runs poorly on this cylinder off of idle and only picks up at higher rpm - off of idle the exhaust gas is cool with a weak pulse compared to the other cylinders and the pipe cools off - the end of the exhaust is dry and shows little sign of unburnt fuel - I swapped the plug caps over with the right cylinder but the symptom didn’t change - I suppose I’ll have to swap the carbs to see if the problems transfer ? The idle rpm doesn’t respond to the air jet screw either.
Does anyone have any advice or thoughts about what the problem might be ?

Thanks.

Cheers
Paul

[phildu31]

Your problem is clearly in the corresponding carburettor and only there.

[rd84]

I’m wondering why the idle doesn’t respond to the air screw - maybe still blocked ?

I’ll swap carbs to see if the problems transfers to rule out engine or inlet problems

[phildu31]

If you're way too rich or too lean for any reason, you won't notice any difference with the air screw.

[rd84]

If you're way too rich or too lean for any reason, you won't notice any difference with the air screw.

Thanks