Swing arm skid plate needs to be turned 180* in the last pic.

Checked that. The bolt pattern follows is tapered the same as the swinger. It's the only way it can be mounted.
That is a PWK 36mm. Took a while to get the hang of tuning it but it's never given me trouble once it's set up.

The 250 is not going to be running for a while. 2 of the head studs stripped when I was replacing the o rings in the dome. Not the
studs I had repaired, 2 others. It''s going to be a week or 2 before I can get a piston and have my old cylinder ready to run. Shtuff
happens. I'll have it running soon enough.
Gave me an excuse to get the 500 running and tuned. Dropped the pilot and got it to idle with ease. Can't get the needle to lean out enough. It's an 89 carb bored out to 40mm. The main was really fat at 390 so I dropped it to 370 and it cleans out under throttle. I put the needle clip in the top groove and it still loads up at mid throttle.
The needle is a 6dh6. I have an 87 carb with a 6dk3 needle. Is there a website I could use to look up the needle sizes?

Another question. I'm having trouble with the 500 pushing real hard in the turns. Stock a arms, plus 1 swinger, and work shocks set up for 160 lbs. I'm 180. I'm hoping it can be tamed a bit with set up but I'm not sure how to go about it.
Thanks.