I bought my 16 with 688 miles. Silber @7lbs, Zrp clutch cover. and a z bros front end 39", tki belt drive tensioner. Thats the good...
The bad. I have learned a lot from this sled. The a arm ball joints were all shot on the sled which i didn't notice having it sit on the ground. Put it up on the lift and it had a 1/8"-1/4" play in them. So check those!
I also replaced all the bushings where the a arms bolt on.
I also, had to replace the rubber carb/throttle body boot. Whoever installed the silber kit did a crap job. The BOV reference line that is drilled into the boot was torn. I rode it a season and noticed it the second season. I'm not sure when it tore. Good new was the reeds looks perfect at 1030 miles when I had them out during this.
Replaced all bogie wheel bearings, a few of them were wobbly.
I did get the clutches balanced/serviced at indy specialties.
I'm at 12xx miles now and its never left me stranded. I'd probably buy it again. So minus the maybe 500 I put into parts I didn't expect.
Do a compression test before you buy it, check the ball joints on a lift if you can or have another guy tip it on one side.
Stock belt made it to 1000 miles, I replaced with a new and run that stock as a spare. It still looks good.
Belt drive has been good. 0 issues.
One time it didn't start, sat outside over night 35-40 outside, really foggy. It started up and then died. Wouldn't start up. Flooded it self. tried later on and did the hold the throttle to the bars while pulling. (this gives spark but no fuel) It started right up after a few pulls and ran good the whole trip.
Check those things I listed, I run a little oil in the fuel too. Good Luck