Quote Originally Posted by azzlana View Post
If it helps anyone i just pulled my rb30s carb completely to bits, gave all the jets and hoses a good spray with carby clean and a blow out with the air compressor. I concluded the needle and seat in these carbies are just about indestructable the needle is more ball bearing design instead of a pointed tip which increases its durability. I thought my performance issues was carby related and considered replacing needle and seat until I noticed the durable design and left them be.

The carby clean and reset floats stoped the pop/crackle through exhaust when going down gears. Apart from this and smoother acceleration no other changes notice in performamce.
I put a carby repair kit through it. It came with needle, few balls, all the gaskets, etc. I made the 'mistake' of using gasket sealant between the bottom carby compartments.

I'm about to pull it apart again and do an even better job with high spray cleaning with carby cleaner etc.

I will let you know how it goes.

Cheers