So, I have purchased two cbr250 throttle bodies and want to use them on my cl350 because it would possibly improve the performance as well as to see what the power gain would be compared to a carbed system. I figure cbr 125 throttle bodies might work best but all I found were cbr250 throttle bodies because cbr125's were not available in the US market. I figure as long as i install smaller injectors it should work fine. I've also read on multiple forums that carbs require a precise size carb bore to engine cc's because that's how the fuel is delivered vs throttle bodies FI where it is being electronically delivered and doesn't rely on the vacuum to completely deliver the fuel. The (cbr250)throttle body bore size is 48mm OD. and the ID. is 39mm. what do you guys think, will the bore size affect performance if so should i get some cbr 125 throttle bodies which are 30mm ID., also looking to use a ECU such as a micro squirt to control the FI system as well as ignition system. Let me know, any input is appreciated and really looking forward to getting this completed soon.