js550 js440

1. So I broke the tip of my needle on my 34mm mikuni was wondering how people got a broken tip out? 2. Had a 38mm mikuni laying around so I threw it on the 300 set high and low at 1.5 turns seemed to run fine but haven’t tested it on the water yet but was wondering if anyone has done this...

Okay I just got a js440 and a js550. New to skis and two strokes in general.. What's the best way to install a throttle cable?

Well i have a couple of question that google cant seem to answer for me, so i have a 85 js550 with a good working motor that i pulled and want to put in my new to 91 js440 with a rear exhaust... now for this swap i have a couple of questions..... can the 440 ebox be used on the 550 engine...