87 510 TE Mikuni Carb Swap

Which TM 38 to use on 87 510LC
3886 with 43mm intake
3885 with 47mm intake
TM40 with 44mm intake

What are jet specs at sea level. I know you guys have this info somewhere.
Thanks
Marc

The OEM Dellorto PHM40 is a great carb. Why are you wanting to go to the Mikuni?

My 87 runs different depending on ambient temps. At freezing temps it'll run/start ok. As temps climb above freezing it runs poorly-loads up etc. also notice the bike has step or drop off of idle speed at tail end of warming up when not on choke.

Carb is clean and jetting stk. Starts well but idles erratic and is not consistent. I have never had an issue with Mikuni Tuning and I know of one air cooled original owner that gave up and went to Mikuni and can now race with us.

Sounds a fair enough reason. My experience with both 87 and aircooled models is that the Dellorto works fine. I always fully refit the carb with new brass , needle and gaskets etc. Haven’t replaced the slides.

I did have a problem with the fuel inlet filter screen blocking once and that caused very erratic running due to fuel starving at high revs.

What elevation do you ride at? My experience is sea level to say 500 m only.

Good luck as the bike is great fun.