eblack wrote:
I held one last week at the mikuni display in Daytona it was a nice piece, seemed much cleaner and simplier then the cv40. I've heard a big reason to install one is to get rid of your fuel pump? If so does it come with a 2.5mm float valve?
As Flash said, the Yamaha version is setup for use with a fuel pump. As are most that are sold for Road Stars even from other vendors. The advantage they have is that they are designed to be used with the Road Star cable ends. The HD versions require cable replacements.
Unlike our BSR40s, the 42mm has a ton of parts available from Mikuni distributors that you can use for rejetting, including replacement float valves for a variety of requirements. So its real easy to get a replacement needle/seat for the float bowl.
There are also a few options on the
main needle depending on usage and requirements, so aftermarket jet kits are just not needed for this
carb. All the parts you need are available directly from Mikuni through their distributors.
The 42mm belongs to Mikuni and they own all rights to distribution. So they make the stuff we need available to us. The BSR40 is made by Mikuni, but distribution rights belong to Yamaha so Mikuni can't sell it (or any parts for it) through their normal distribution.
If I get one for the project bike, I am planning to buy a Yamaha version (Speedstar. Barons etc..) and replace the float bowl valve. Its cheaper than buying new cables and there will be less to mess with. Only saying if because I am also looking into S&S and Weber options too. I really like the Weber but it is going to require a lot of mods to work with the Road Star, and the S&S needs manifold adaption. So the 42mm is going to be the easiest route.
42MM Parts diagram, Needle Valve (float bowl valve) is #69:
42/45/48 mm Parts Diagram
42MM Parts list, including various options. Look at the Needle Valve options at the bottom:
42/45/48 mm Parts list
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