Tell us more about when you changed the parts, did you change the parts and have the codes read? Did you reset the codes after you changed the parts?
First make sure the TPS sensor is installed properly with no air leaks.
Second, have the codes reset and read again. If the cat code comes up again I would consider changing them. You don't have to spend a zillion dollars on original cats, just get them from Summit Racing for 70 bucks each and have them welded on.
How many miles on the engine?
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John C
1996 DI - 3" AG lift
1995 DI - Scorpion Racing Extreme Kit
1991 RR - parting out (few parts left)
1990 Kawasaki KL650B Tengai
1989 Kawasaki KLR650
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