For 5 yrs I've sent my bobber to have the twin carbs fully serviced by 5 separate motorbike workshops throughout Klang Valley where all were serviced by the senior mechanics yet after a few thousand km of riding, I found there were much carbon built up on the right plug compared to the left plug. From discussions with the President of the Regal Raptor Owners Motor Group, he said it was generally known the right carburettor tends to be slightly rich but no one could offer a solution like it was live and let live. However, this carburettor is internationally popular, used on a variety of motorbikes and reputed as reliable so I felt something must be wrong probably with our Malaysian batch but business being business, no one in the budiness of selling motorbikes is going to admit it.
After a long hiberation, my Iron Zebra was given a thorough service to ensure it gets the JPJ PG10 inspection certification and it did. Still, there was some petrol overflow. My mechanic said it was very difficult to clean the petrol scum that stuck to the wall he even used an ultrasonic equipment for my carbs. After a second dismantle and critical inspection of the twin carbs, the mechanic said my valve needle were faulty and couldn't be repaired so were replaced. After a few runs, I acknowedged the carburettors now run more smoothly than before in particularly, cruising at <30kmh, specifically, 20kmh. The motorbike does it so smoothly. not once coughs like it used to before. My new mechanic generally services superbikes and is also a racer so I suspect his motor mechanic is very sound filled with much experience.
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| Mechanic said based on the Mikuni carb needle valve chart, PD26JS needle valve looks similar to the one he highlighted |
