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Imformations on troubleshooting for motorcycles

Accel opening Symptom A/F Remedy by Fuel tune-up kit "TORNADE-kit"
Low speed idling Unstable speed
Engine stops		 Lean Exchange PJ for RR.PJ
Fasten air-screw
Loose Pilotjet
Black smoke
Dull engine sound
Engine stops after initial running		 Rich Exchange PJ for L.
Loose air-screw
Fasten pilotjet
Mid speed Flat spot
Knocking
loss of speed		 Lean Exchange JN foe R.
Slow response Rich Exchange J/N for L.
Improper
Poor acceleration
Full opening
(High speed)		 Flat spot
Knocking
overheating		 Lean Exchange PJ for RR, MJ for R, JN for R.
Blistering of plug porcelain by overheating.
Higher speed but loss of power keen(sharp)engine sound Exchange MJ for R and JN for R.
Loss of speed at Low speed Exchange PJ for RR.
Loss of speed at Low speed Exchange PJ for RR.
Power filter is newly exchanged Exchange PJ for RR, or MJ and JN for R.
Exhaust muffler is newly exchanged for one with better flow Exchange MJ, JN for R
If you are still unhappy with the performance:
If your ploblem cannot be cleared by sizing-up the jets.
seat of float valve,clog in tube and cock,secondary air absorption via insulator.
Full opening
(High speed)		 Max speed cannot be peaked Rich Exchange MJ for L,and also JN for L.
Poor response
Insufficient Power-torque
Speed does not increase sharply Exchange MJ for L,and also JN for L.
Dull response at Low speed Exchange MJ for L or LL,and also JN for L.
Muffled solid sound Exchange MJ for L and also JN for L.
Good acceleration but Max speed is not peaked Exchange PJ for L or LL and also Jn for L.
Black smoke
If you are still unhappy with the performance:
Please check if over-flowing is not occuring and also if the choke is certainly returned.

PJ = Pilot Jet 

MJ = Main Jet 

JN = Jet Needle 

The spark plug conditions may differ by bike model or cruising condition.
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