Hello All,
I am new to the site and excited to be here.
I've got an MB200X Hurricane minibike and I've swapped the stock 196cc engine for a Predator Ghost. I swapped the cast flywheel for an ARC with a .045" coil gap. The exhaust is a GoPowerSports Super Pipe. After breaking in the Ghost it became apparent that the stock carb was running way too lean. Bone white plug, running hot and just plain inconsistent performance, stalling and hard cold starting. The carb may be fine on a kart but not on a minibike with the GPS superpipe...so I bought a Mikuni VM22-133 for it. Bolted it on for an instant boost in performance. Checked plug and still running lean so I changed the pilot jet to a 22.5 and got good plug color and drivability at part throttle operation. High speed run still running hot with white plug so I began increasing the main jet size. Started with a 130....now all the way up to a 290 and she's still looking for more fuel. I've done a thorough check for vacuum leaks as I was shocked this motor still wants more fuel. To note the drivability and performance has increased with each increase in jet size and the plug is starting to get some light color after a high speed run. Nothing inconsistent about this experience except the size of the jet this motor wants is shocking...
Has anyone else put a 22mm Mikuni on a Ghost and jetted it properly?
What are you using for an exhaust system?
What main jet did you end up with?
I am new to the site and excited to be here.
I've got an MB200X Hurricane minibike and I've swapped the stock 196cc engine for a Predator Ghost. I swapped the cast flywheel for an ARC with a .045" coil gap. The exhaust is a GoPowerSports Super Pipe. After breaking in the Ghost it became apparent that the stock carb was running way too lean. Bone white plug, running hot and just plain inconsistent performance, stalling and hard cold starting. The carb may be fine on a kart but not on a minibike with the GPS superpipe...so I bought a Mikuni VM22-133 for it. Bolted it on for an instant boost in performance. Checked plug and still running lean so I changed the pilot jet to a 22.5 and got good plug color and drivability at part throttle operation. High speed run still running hot with white plug so I began increasing the main jet size. Started with a 130....now all the way up to a 290 and she's still looking for more fuel. I've done a thorough check for vacuum leaks as I was shocked this motor still wants more fuel. To note the drivability and performance has increased with each increase in jet size and the plug is starting to get some light color after a high speed run. Nothing inconsistent about this experience except the size of the jet this motor wants is shocking...
Has anyone else put a 22mm Mikuni on a Ghost and jetted it properly?
What are you using for an exhaust system?
What main jet did you end up with?