750 carb I.D.

[wraith]

I know this was asked some time back but I can't find it, so sorry for asking it.

Need to replace the seals but I can't remember which model they came off they are the gsxr750 38mm carbs I've been running them on my 1127 engine.

I knt there are two different 38mm carbs one like these with the nut on the bottom of the float bold the other type have the more standard screew drain.

So which model are these?

Thanks.

[nibbs]

I have an exact set of bst38's like you have in the photo and they were from a 750 L 1990.

Im planning on fitted them to my 1127 and was about to ask on this forum what jetting was required?

Would you mind sharing some info on your setup?? 

[wraith]

1 hour ago, nibbs said:

I have an exact set of bst38's like you have in the photo and they were from a 750 L 1990.

Im planning on fitted them to my 1127 and was about to ask on this forum what jetting was required?

Would you mind sharing some info on your setup?? 

Cheers and happy to share

Jetting I'm running.

Main jet Dyna 155 (other makes vary in size)

Needle in center groove.

Pilot jet 3 turns out. (Or put standard 1127 pilot jet in and + 1/4 turn out on standard settings)

I'm running gsxr1000k2 headers with home made link pipe, open end can and twin pod K&N filters.

Depends on your exhaust/filter set up you may need to do some fine tweeks for you own set up, but this should give you a very good starting point.

Thanks again for your carb info.

[Dezza]

750 L carbs have the big plug that enables main jet changes without float-bowl removal. The similar 750 M carbs do not have this. 750W (pre-SRAD) carbs look similar to those of the 750M but the spacings are different so are not easily mounted to an oil cooled head.