Long time no post - 1998-2002 GTX is 'roughly' the same hull.
my 2002 GTX rode smoother and tracked straiter than my 1999 GTX LTD however, so it may not be exact.
Engine size however would determine things like engine mounts, exhaust location, etc. that cannot be easily changed.
1998 had 3...
There's a test in the FSM for the pickup sensor I believe. I made a tool from an old ski from the wireharness... but realistically... no. you're going to have to pull the pipe in a GTX to get the cover off to inspect the magneto and pickup sensor... if it's in bad condition it could be telling...
cuz 2 is better than 1? I don't know, it's no longer a wasted spark system, but I can't say it's magically superior.
CDI in the MPEM? no idea
I assume just the correct ones in the parts diagram?
I do not know :-/
My preference was to only work on the 99+. Ideally the 01+
I'm not sure what the right stuff refers to, but you can install/remove the jet pump all day long. It's just 4 nuts and a rubber lip seal...
go for a ride with the seat off and check for water coming from anywhere. maybe a missed hose? the one under the pipe is fun. there's 3 on the pipe total...
Are you actually able to get ahold of a new one? most new orders here say at least a year out... I'd make sure you have the new one in-hand before anything... and yes, I regret selling all my stuff, but sometimes you have to move on.
you can replace the paddle wheel with a GPS sensor now. if you want a working speedo - that's your best option and I believe in the same ballpark price anyway.
the 97.5 was white and the first 951. very rare. easily explodes. special pipe
1998 was the first run of the 951. some problems. single coil ignition.
99-02 are 99% the same engine wise.