Hello St1g9203,The biggest CV carb that you can buy in Indian market will be BS33, used in Royal Enfield UCE500 (Carbed version) and the Pulsar 200NS by Bajaj. But if your bike's inlet port is around 28mm then why go for such big carb? It won't help anyways. I have seen 350s using 30mm flat slides, they work pretty well, the difference of 1mm or 2 is fine I feel but 6mm difference is just too much for the 350. I am pretty sure that the low end crisp will just die. If you want to experiment with carbs then the next best option for you will be a BS29 with ported throttle slides -Sanket
Thanks for your quick input Sanket. I have zeroed in on the BS29 Carb. Can some one put the jet sizes of BS29 used in RE (TBTS models)
Just a thought, but didn't the early AVL 350s use 26mm Dell'Orto carbs? A slight hike up to a 28mm Dell'Orto ought to give you some tuning potential. Likewise. a properly jetted VM28 Mikarb off a 500 cast iron Bullet could be a budget tuning option. Also the stock AVL cams might be limiting your top-end performance, this is certainly the case on the 500 AVL models.REgards,A.
I think the BS29 carb has 12.5pilot and 110 mainjet, either that or 15 pilot and 115 mainjet.