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Old July 12th, 2019, 12:54 AM   #2
DannoXYZ
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Name: AKA JacRyann
Location: Mesa, AZ
Join Date: Dec 2011

Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C

Posts: A lot.
MOTY - 2018, MOTM - Nov '17
1. Carefully inspect rubber boots between head and carbs. Did any of 4-junctions get pulled apart causing vacuum leak?

If there was rust, it may have found its way downstream.

2. Test petcock flow-rate. Unplug fuel hose from carbs and aim into measuring cup. Turn petcock to prime for 30-sec. How much petrol did you collect in measuring cup?

3. Test float levels without removing carbs! Slip hose over float-bowl drain nipples and aim into empty measuring cup. Drain both float bowls. How much petrol did you collect in measuring cup?

4. Pull plugs and post photos of them. Wondering if speed-loss is due to lean or rich mixtures?
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