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2OR4STROKES
Joined: 12 Dec 2008 Posts: 67 Location: Singapore
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Posted: Wed Nov 30, 2011 1:21 pm Post subject: sb6r carb specifications. |
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Hi
Hope that someone can help me on this.
Been riding my sb6r regularly and found that the low end from transition to throttle opening is not smooth and if fact a little jerky. It is smooth everywhere else above 3000rpm. I know and I don't ride at such low rpm but during traffic jams this transition irritiates me. I need to open up the carbs to check the jettings and settings, float level etc. Can someone who has the info please help ?
I almost forgot , does the SB6r run a little fluffy at low rpms from transition to just initial throttle openings? I bought mine 2nd hand so I may never know for sure is it due to different cams,carbs, settings etc. I am sure the gsx r 1100 engines made by the japs is not like that from the factory.(knowing how the japs do bike that is) _________________ Riding a bike is only as dangerous as your mind and level of training. The rest is up to God. |
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Evilchicken0
Joined: 12 May 2010 Posts: 2996 Location: London
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Posted: Wed Nov 30, 2011 2:33 pm Post subject: |
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The 6R has a fuel pump which owners tend to trow away. The 40mm carbs do take some setting up though, but first things first check / clean the air filter, clean the carbs, and make sure they're ballanced.
Although it can be expensive have it put on a rolling road. _________________ Don't read everything you believe |
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oily
Joined: 05 Apr 2008 Posts: 4788 Location: worcestershire
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Posted: Wed Nov 30, 2011 2:59 pm Post subject: |
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Not the smoothest even when set up
Throw the fuel pump away and let gravity do it's thing.
Clean the gauze strainer in the tank and the fuel filter in the air box then enjoy
If these things don't work, I'll sort out the workshop manual |
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2OR4STROKES
Joined: 12 Dec 2008 Posts: 67 Location: Singapore
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Posted: Wed Nov 30, 2011 8:24 pm Post subject: |
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Thanks .
Throw the fuel pump away? Why? I thought my bike was out of syn based on the symptoms . I did take it out once when it was overflowing due to the float level and set at air/fuel mixture screw to 2.5 turns out. is that even correct because it can't be set once the carbs are installed due to the ridiculous design. I can't even adjust it to the best or smoothest idle with the engine running is what I mean. _________________ Riding a bike is only as dangerous as your mind and level of training. The rest is up to God. |
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oily
Joined: 05 Apr 2008 Posts: 4788 Location: worcestershire
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Posted: Wed Nov 30, 2011 8:28 pm Post subject: |
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Throw the pump away because it is what causes the carbs to overflow( on the over run) not the float height |
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oily
Joined: 05 Apr 2008 Posts: 4788 Location: worcestershire
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stockcar
Joined: 07 Apr 2011 Posts: 836 Location: in the shadow of the "angel"
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Posted: Wed Nov 30, 2011 9:46 pm Post subject: |
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intriguing i have always been mighty impressed with the low end response of my 6R............maybe thats because i also have some pukka old skool rides?? |
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2OR4STROKES
Joined: 12 Dec 2008 Posts: 67 Location: Singapore
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Posted: Thu Dec 01, 2011 4:38 pm Post subject: |
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Hmm Hmm very very interesting all that has been said by you guys.
My bike is not overflowing now with the vacuum pump but i do feel it is a tad rich at low rpms . Oily can you let me know what is the standard setting as compared to what you are running now? I do see your 165 main jets and etc.
I'll take the pump off and see what happens. Why did Bimota put it there is it can just run on gravity? Are the engineers sleeping or italians are just italians riding at full throttle all day long that is , so a vacuum pump works. _________________ Riding a bike is only as dangerous as your mind and level of training. The rest is up to God. |
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oily
Joined: 05 Apr 2008 Posts: 4788 Location: worcestershire
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Posted: Thu Dec 01, 2011 4:59 pm Post subject: |
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2OR4STROKES wrote: |
Why did Bimota put it there is it can just run on gravity? |
Why indeed
Why did Bimota think they could build the perfect 500 two stroke?
I'll look up the settings later |
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oily
Joined: 05 Apr 2008 Posts: 4788 Location: worcestershire
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Posted: Thu Dec 01, 2011 6:22 pm Post subject: |
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Standard settings according to Bimota's workshop manual.........
Mikuni BST 40SS
I.D. number....46E2
Idle r.p.m....1100rpm
Float height....14.7mm
Main Jet....127.5
Main Air jet....2.0mm
Jet needle....6ZD20-4ta
Needle jet....P-2
Throttle Valve....120
Slow running jet....40
Air screw...1 3/4 out
Hope that helps because it didn't help me |
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2OR4STROKES
Joined: 12 Dec 2008 Posts: 67 Location: Singapore
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Posted: Wed Dec 14, 2011 5:24 pm Post subject: |
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Hi
Thanks Oily for the carb specifications. I'll check mine when I'm free _________________ Riding a bike is only as dangerous as your mind and level of training. The rest is up to God. |
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