92 xp under powered?

[lloyd54123]

I have a 92 xp that the previous owner swapped engines and I've now changed cranks. I was only given a single carb and I'm finding that my 92 spi has a lot more hole shot. I'm pretty sure the xp model had a different impeller. Could the slow acceleration be due to the single carb being unable to power a different pitch? Maybe my carb adjustments are off? I did have to take my rotary wheel off... I'm honesty not sure what the symptoms of it beeing out would be. Any insight would be greatly appreciated.

 

[emspjay]

How is the wear ring? Does it feel like the XP is slipping or cavitating when taking off?

 

[lloyd54123]

The wear ring is good. Not new but pretty tight. I dont think its slipping or cavitating either.

 

[lloyd54123]

I'm leaning toward the impeller being too hard to turn with just the single carb but could anyone tell me what the symptoms of a rotary valve being a few degrees off would be?