650/X-2 40 mm carb mani?

[Stefanko135]

I got this 40 mm carb for free a few days ago and thinking about putting it in my 650 sx but need a manifold! Iv herd of just takeing a dremel and makeing a 38 to match a bigger carb or if i should find a manifold or even send it out to get it bored? Also how much of a difference is a 40 mm carb gunna make?

 

[Crab]

Get a mikuni 44

 

[jetskijockey]

I got this 40 mm carb for free a few days ago and thinking about putting it in my 650 sx but need a manifold! Iv herd of just takeing a dremel and makeing a 38 to match a bigger carb or if i should find a manifold or even send it out to get it bored? Also how much of a difference is a 40 mm carb gunna make?

Is it blue in color? Never heard of a 40mm.

 

[Stefanko135]

Its off a 750 ss black

 

[kevbo]

The 94-95 X2 used that carb on a standard 91-up manifold. There is no great performance difference over a 38. If you decide to run the 40 you should bore the manifold inlet to match. Jetting requirements will be much richer than what is in the 750 carb. You will need an 85 pilot jet and a 150-160 main, the top screw will need to be power tuned from there. This jetting is for stock flame arrestors, open F/As will need a larger main jet if the top screw ends up over 2 turns out.

 

[Stefanko135]

How and maybe were should i get it bored at

 

[kevbo]

It is not a critical job, you can use a barrel sander on a drill motor.

 

[anthonystempak]

I'd use the 40mm and l belieave the 750 40mm intake bolts up l Might be wrong though on the manifold

 

[Stefanko135]

Looking for a cheap 38 mm intake mani anyone have one laying arround?