need jetting specs please

[DaUpJetSkier]

What are the stock jets and settings on a 93 650 SJ.

Im building a motor and using that carb and dont know were to begin and want this to go as smooth as possible.

Stock Flame arrestor, 44 mikuni, Greater Yamaha head (35cc domes), Ported Cyl done my Jetskimechanic, stock bottom end, Factory Pipe dry pipe with no water injection.

still trying to get the valvle body asembly off, here are the need valve and spring, the spring looks like a dull silver and needle has a black point????

 

[DaUpJetSkier]

Pete wrote:

I definately know it was a 2.5 needle and seat. A silver spring with pop off around 18 pounds. As far as the high and low jets that is a little fuzzy at this point. I think it was around 120 low and 145 high. but that was with the wet pipe so it won't be exactly that with the dry pipe. I am sure plenty of guys on here can give you good advice on the jettting with the dry pipe. Just post a question.

 

[DaUpJetSkier]

any any one one out there, I just need to know what jets I may need to buy, Im thinking 105-115 lows and 120-130 main. Anything else I need to switch from a 650 to modded 701, as far as the carb goes.

 

[DaUpJetSkier]

no one has ran anything like this setup before with info, ive got some specs from others so far.

 

[SUPERTUNE]

Pete wrote:

I definately know it was a 2.5 needle and seat. A silver spring (use 95 gram) with pop off around 18 pounds. As far as the high and low jets that is a little fuzzy at this point. I think it was around 120 low ( might need bigger low) and 145 high. but that was with the wet pipe so it won't be exactly that with the dry pipe. I am sure plenty of guys on here can give you good advice on the jettting with the dry pipe. Just post a question.

What wrong with starting with this set-up? It's only a single carb, It might take you all of ten minutes to do a jetting change, so what the big deal it's not like a dual set-up that take 45 mins to make changes...

 

[DaUpJetSkier]

good point, I just wanted to make is as smooth as possible seeing im going to be doing it on my way to daytona.

 

[SUPERTUNE]

OK, I'll have my jet box with me there, so if you need anything different I'll have it on hand...
Team Scream Racing
1988 Carroll St.
Clearwater, Fl. 33765
(727)442-7700

 

[DaUpJetSkier]

hhaha sorry, not the THE daytona ride, but I wil be going to Daytona early March to ride.