Carb conversion

[flash gordon]

Hi All,

I am considering changing the bst36ss carbs on my 89 750 to the post 750 carbs which I believe are the bsr36ss. This is due to my carbs being worn out and not worth the investment and a severe shortage of secondhand bst36ss carbs in the UK. Even crap ones go for silly money !! My bike is only worth a few hundred of your dollars. It might be best to break it for spares and go get another newer and lower mileage bike. I could get big bucks for my knackered carbs The only option is to get the conversion parts to make it work and these parts are readily available over here.
I have done some searching and assume I need the following parts from the post 98 model , but could someone confirm the parts I need?

Post carbs BSR36SS (obviously)
Inlet rubbers, including all o-rings (2 inside and 2 head mounting)
Airbox to carb connecting rubbers
Handle bar throttle and switchgear
New throttle cables (mine has handlebar conversion)

Anything else ? Post airbox maybe ?

Cheers.

[Kreylyn]

Hi All,

I am considering changing the bst36ss carbs on my 89 750 to the post 750 carbs which I believe are the bsr36ss. This is due to my carbs being worn out and not worth the investment and a severe shortage of secondhand bst36ss carbs in the UK. Even crap ones go for silly money !! My bike is only worth a few hundred of your dollars. It might be best to break it for spares and go get another newer and lower mileage bike. I could get big bucks for my knackered carbs The only option is to get the conversion parts to make it work and these parts are readily available over here.
I have done some searching and assume I need the following parts from the post 98 model , but could someone confirm the parts I need?

Post carbs BSR36SS (obviously)
Inlet rubbers, including all o-rings (2 inside and 2 head mounting)
Airbox to carb connecting rubbers
Handle bar throttle and switchgear
New throttle cables (mine has handlebar conversion)

Anything else ? Post airbox maybe ?

Cheers.

Just the carbs and air box boots.

You can run the single throttle cable fine, it will still work no issues. Everything else matches up including the air box. It's just the BSRs are round where the air box boots match up, and those would need swapped.

Krey

[flash gordon]

Thanks.

I remember reading a post on here stating that a few people have already done this conversion but no-one mentioned how well the bikes ran afterwards - not that I'm gonna do this for improved performance !!

Any experiences anyone ?

[shpielers]

When you get that far, just leave the TPS unplugged.
I believe I've heard that the post 750 carbs give a little less oomph than the pre, but as Krey indicated, pretty straightforward swap.

[flash gordon]

A little less oomph !!...I'm sure I can live with that

Thanks.

[flash gordon]

One last thing...do the post 600 carbs fit on a pre 750 ?

I appreciate there might be even more power loss but at least it keeps the bike on the road

[arsenic]

don't do that.

[arsenic]

Swapping 98+ 750 carbs on pre will work. I can't comment on any performance gains or loses. I just don't know. I'm 100% sure it will work. The bike will remain on the road. With that said, I don't recommend it. If it's your best option, it WILL work. Definitely don't put 600 carbs on it. You might need matching intake boots. The airbox for sure, but someone already brought that up. Just one throttle cable and leave the TPS unplugged. Done! Oh, you need the 98+ petcock too. That's a must. The pre 98 has 2 fuel lines, the 98+ only has one.