Bimota Forum Forum Index Bimota Forum
Forum for Bimota Owners and Riders
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in  

Carb settings on an SB6R

 
Post new topic   Reply to topic    Bimota Forum Forum Index -> SB Series
View previous topic :: View next topic  
Author Message
gobert bimota



Joined: 15 Sep 2010
Posts: 4

PostPosted: Thu Nov 04, 2010 3:05 pm    Post subject: Carb settings on an SB6R Reply with quote

Hello

Does anyone know the carb settings on an SB6R?

Thanks
Back to top
View user's profile Send private message Send e-mail
oily



Joined: 05 Apr 2008
Posts: 4788
Location: worcestershire

PostPosted: Thu Nov 04, 2010 4:33 pm    Post subject: Reply with quote

To get my 6R running anywhere near I disconected the fuel pump, had the carbs ultrasonicly cleaned and then had it set up on a dyno Wink

The current carb settings are not even close to what Bimota say they should be.
When I set the carbs to Bimot's settings, the engine would only tickover with full choke. Crying or Very sad
Back to top
View user's profile Send private message Send e-mail
Brad



Joined: 11 Aug 2010
Posts: 46

PostPosted: Thu Nov 04, 2010 10:02 pm    Post subject: Carbs Reply with quote

I've been told that the pump needs to be serviced.It looks like the pump on a junior dragster Confused Confused Confused
Back to top
View user's profile Send private message
oily



Joined: 05 Apr 2008
Posts: 4788
Location: worcestershire

PostPosted: Fri Nov 05, 2010 11:14 am    Post subject: Re: Carbs Reply with quote

Brad wrote:
I've been told that the pump needs to be serviced.It looks like the pump on a junior dragster Confused Confused Confused


After pulling my pump apart a couple of times to try and sort out the fueling,
I can't see anything in it that would need servicing Crying or Very sad
My 6R runs fine without the pump Wink
Back to top
View user's profile Send private message Send e-mail
Brad



Joined: 11 Aug 2010
Posts: 46

PostPosted: Fri Nov 05, 2010 11:41 am    Post subject: me too Reply with quote

Thats what I thought but the junior dragster guys do it regularly apparently maybe the methanol screws something up.
The bit I don't understand is why should taking the pump of change anything? especially the main jet.
Having tested my SB6R I think the carbs are poo anyway, always have been ever since the GSXR1100M had them fitted the throttle response is dire.Injection is the way to go Cool Cool Cool Cool
Back to top
View user's profile Send private message
oily



Joined: 05 Apr 2008
Posts: 4788
Location: worcestershire

PostPosted: Fri Nov 05, 2010 11:55 am    Post subject: Reply with quote

That could be it Wink
Methonal screws most things up Wink
Back to top
View user's profile Send private message Send e-mail
oily



Joined: 05 Apr 2008
Posts: 4788
Location: worcestershire

PostPosted: Fri Nov 05, 2010 12:46 pm    Post subject: Reply with quote

Injection is the way to go(........along with a turbo Laughing) but the cost is prohibitive to a lot of us.
I can't help thinking (for several years) that these engines would run better on 38mm carbs instead of the 40mm suzuki san gave them. The 40mm seem to over fuel at every point except the very top end .
Back to top
View user's profile Send private message Send e-mail
Brad



Joined: 11 Aug 2010
Posts: 46

PostPosted: Fri Nov 05, 2010 1:12 pm    Post subject: hrottle response Reply with quote

The test to do when on the dyno is to take it to say 6000rpm shut the throttle wait unitil it gets to 5000rpm the snap it open.You'll find that the slides go up too quickly and there's not enough fuel.On the road you'll feel this by what seems like an initial drive then a pause then it'll all comes in,this also makes it feel peaky.On the dyno you can repeat it at 6000,7000,and 8000rpm.
The best carbs for throttle response I've found are the Bandit 36mm jobbies.
The way Suzuki eventually tried to cure this on the 600 and 750 srads was to have dual slide speeds by bleeding the vacuum off the slide with valves connected to the CV carb top.This maintains good throttle response without having to much slide speed at lower rpm.
Adapting a efi system from a GSXR1000 should be easy enough, you just need a rotor to be made the throttle bodies pump etc the hardest part is getting the cam pos sensor on. Cool Cool
Back to top
View user's profile Send private message
Evilchicken0



Joined: 12 May 2010
Posts: 2811
Location: London

PostPosted: Fri Nov 05, 2010 4:44 pm    Post subject: Reply with quote

personaly I'm thinking about rocket power Arrow Arrow Arrow
_________________
Don't read everything you believe
Back to top
View user's profile Send private message
oily



Joined: 05 Apr 2008
Posts: 4788
Location: worcestershire

PostPosted: Fri Nov 05, 2010 4:50 pm    Post subject: Reply with quote

Evilchicken0 wrote:
personaly I'm thinking about rocket power Arrow Arrow Arrow


SB power not enough for you any more Laughing
Back to top
View user's profile Send private message Send e-mail
Evilchicken0



Joined: 12 May 2010
Posts: 2811
Location: London

PostPosted: Sat Nov 06, 2010 1:31 am    Post subject: Reply with quote

oily wrote:
Evilchicken0 wrote:
personaly I'm thinking about rocket power Arrow Arrow Arrow


SB power not enough for you any more Laughing
It'll be find if only I could get some !!!
_________________
Don't read everything you believe
Back to top
View user's profile Send private message
oily



Joined: 05 Apr 2008
Posts: 4788
Location: worcestershire

PostPosted: Sat Nov 06, 2010 10:37 am    Post subject: Reply with quote

Evilchicken0 wrote:
oily wrote:
Evilchicken0 wrote:
personaly I'm thinking about rocket power Arrow Arrow Arrow


SB power not enough for you any more Laughing
It'll be find if only I could get some !!!


So you haven't done that bit of a job yet Laughing
Back to top
View user's profile Send private message Send e-mail
oily



Joined: 05 Apr 2008
Posts: 4788
Location: worcestershire

PostPosted: Sat Nov 06, 2010 10:42 am    Post subject: Re: Carb settings on an SB6R Reply with quote

gobert bimota wrote:
Hello

Does anyone know the carb settings on an SB6R?

Thanks


This is what works for me........

165 mains
pilots 2 1/4 turns
needle groove 5
fuel pump disconnected

gives 137 rwbhp and 79 torque
Wink
Back to top
View user's profile Send private message Send e-mail
Evilchicken0



Joined: 12 May 2010
Posts: 2811
Location: London

PostPosted: Sat Nov 06, 2010 1:51 pm    Post subject: Reply with quote

oily wrote:
Evilchicken0 wrote:
oily wrote:
Evilchicken0 wrote:
personaly I'm thinking about rocket power Arrow Arrow Arrow


SB power not enough for you any more Laughing
It'll be find if only I could get some !!!


So you haven't done that bit of a job yet Laughing

Not yet ... but I've got some excuses Very Happy
_________________
Don't read everything you believe
Back to top
View user's profile Send private message
sb6rdaz



Joined: 23 Nov 2010
Posts: 124
Location: Burton-upon-Trent

PostPosted: Tue Nov 23, 2010 10:31 am    Post subject: Reply with quote

The 6R doesn't need the fuel pump, and the carbs are fine on that motor. The fuel pump is driven from vacuum in the intake, but is ported from the wrong side of the carbs, so increases/decreases fuelling at the completely wrong time. IE, gives bigger flow on a shut throttle on the overun, and less on a wide open throttle. The GSXR was gravity fed, as was the SB6, so no point in the 6R. Plus the float valves are not strong enough to hold back the fuel pressure, hence all the overfuelling symptoms everyone sees.
The stock carbs can be jetted very well, once all the external influences are taken away, and have mine fuelling spot on, regardless of revs/throttle openings etc. be it on the street, dyno or track.
Back to top
View user's profile Send private message Visit poster's website
Display posts from previous:   
Post new topic   Reply to topic    Bimota Forum Forum Index -> SB Series All times are GMT + 1 Hour
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group

The Bimota Forum has no official connection to Bimota S.p.A.. We just ride or are interested in their motorcycles and support the brand. All trademarks are acknowledged