Join Date: Dec 2007
Motorcycle: 06 Hayabusa, 86 & 92 GSXR 750, 00 KTM 380
Re: Best Carburetor option for 1986 GSXR750?
If I were in your shoes (and I am) I would look for a set of second gen 750 slingshots, or mid 90's katana cv's. I have a set of 36mm's from an 89 and a set of 38mm's from a 92. These are to be used on later model 750 engines that I have. For my 86 engine I have a set of 33mm carbs from a mid 90's Katana 600. I was looking for 34mm carbs, but they are only available in the older style 1100 carbs. I chose to stay away from them due to the slide/diaphragm design...they have a permanently attached diaphragm that requires replacement of the whole slide if the diaphragm goes bad (which they do more often than not). Stay away from the 86 750 carbs...they are just plain too small at 31mm, and chances are the diaphragms are starting to dry rot. I personally don't think an 86 750 engine in stock trim needs 36's or 38's, but a lot of people run them. They would probably be great for top end, but I hope to retain some more midrange with the 33's. This is just my $.02's worth as far as size goes, but I assure you, stay away from the older style with the permanently attached diaphragm...they only lead to heartache and more expense in the long run.