Is that a TRX?. I did one a while back (and a Ducati Monster which runs the same carbs).
Yes I would do the jet block o rings. I believe the full Keyster Kits has these included.
Be very meticulous with the jets, I can half remember a blocked jet or bushing under another jet in the jet block so be very thorough when cleaning.
Make sure the air correction jets in the carb inlet are clean as well.
Ultrasonic cleaner is a good start but you need to manually clean everything afterwards.
Personally now I replace the jets if they have been in a sorry state, should come with a full kit.
Yes I would do the jet block o rings. I believe the full Keyster Kits has these included.
Be very meticulous with the jets, I can half remember a blocked jet or bushing under another jet in the jet block so be very thorough when cleaning.
Make sure the air correction jets in the carb inlet are clean as well.
Ultrasonic cleaner is a good start but you need to manually clean everything afterwards.
Personally now I replace the jets if they have been in a sorry state, should come with a full kit.