Virago 535 rear plug sootsup black front plug ok

Did a professional shop "rebuild" the carbs? If not, take the bike to a professional and tell them what you did or had done! They will fix it!

You need someway to clean, set and synchronize the carbs - try a professional shop!!

If it's running rich already, a bigger jet will just make it run even richer.

As far as the rear cylinder running hotter, that's just the nature of the beast with a V-Twin engine, because the front cylinder blocks the airflow to the rear.

I to bot two 535,s I redone one for now and working on the other they set for 2 years too ones carb,s were trasht I had prob,s with the other not running right it turnd out it was plug,s nothing was wrong with the carb,s

If your carbs and plugs are fine you may wish to check into you wiring harness to see if you have a cyclinder not firing due to a problem with wiring (frayed or disconnected).

hi buddy i found a 1985 one but over £100 ? http://cgi.ebay.com/ebaymotors/HONDA-XR600R-85-xr-600-r-xr600-r-Carbs-Carburetors_W0QQcmdZViewItemQQ_trksidZp3286Q2ec0Q2em14QQhashZitem5881c2af6bQQitemZ380134141803QQptZMotorcyclesQ5fPartsQ5fAccessories

better look at carb-there r 5 diff jets but its probly the mid range one-be careful here because rong ajust can hurt engine-u hav a clymer manual? library has many books on mc maintenance-sayonara

1 st check compression on that cylinder by taking spark plug off and getting a compression tester and screw into spark plug hole then turn the engine over and if the compression goes over 100psi/7.5 bar then your ring are ok a picture below will demonstrate get back to me if the ring are ok i have more solutions