iridebiketrials

i need to know what things are not able to swap between the 88-89's and the 90-91'crx's...like the front headlight assembly...are the 88/89's different from the 90-91's?? what about the tailights...am i stuck with the 88's or can i upgrade to the 90-91 style with mods???...what about other interior exterior pieces...like the corner lights...can i mod some 90-91's into an 88? and what about structual changes between the two...anything different between the two and what about the si and hf...what changes were made and what is going to limit me to certain things...

really what i want to know is what is different about the si and the HF (besides the obvious) and what is different between the 88-89 series and 90-91 series..