Bimota Forum

2OR4STROKES · Joined: 12 Dec 2008 Posts: 67 Location: Singapore

Hi I would like to know whether anyone in our forum has bought an sb6r new . If yes can he or she enlighten us how is the carbs set up.. Does it run smoothly or runs poorly at crawling speed in traffic .. The irritating transition from close throttle to slight opening in traffic is frustrating and I think of ways to solve it constantly. Tried a few tricks but it's all still the same. Bike runs well everywhere else.
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Riding a bike is only as dangerous as your mind and level of training. The rest is up to God.

Evilchicken0 · Joined: 12 May 2010 Posts: 2996 Location: London

Do you have to much throttle slack ? you can adjust it under the throttle twist grip.
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sb8rs · Joined: 05 Aug 2011 Posts: 150 Location: London

Hi
On my 6r i removed the pulse / fuel pump so it was gravity fed. Then had it set up on the dyno. Perfect!
The issue is the pump (actually comes off of a lawnmover) as it gives too much fuel at lowrevs and not enough at high.
Do this and you will love your bike even more.

2OR4STROKES · Joined: 12 Dec 2008 Posts: 67 Location: Singapore

I'm considering this but some members and owners of 6r of this forum are dead sure that we should not remove the pump so I'm really confused
_________________
Riding a bike is only as dangerous as your mind and level of training. The rest is up to God.

2OR4STROKES · Joined: 12 Dec 2008 Posts: 67 Location: Singapore

sb8rs · Joined: 05 Aug 2011 Posts: 150 Location: London

Hi 2or4

The settings are different for each bike, but i followed the lead of "johnny be bad" on this forum. So i think it would be best to PM him for jet sizes and needles settings.

However my understanding is that the theroy behind it is the pulse pump was put on as the outlet from the tank is lower than the carbs. However in practice this does not matter as the suction of the carbs drags the fuel through. I can vouch for this as i actually drained the tank dry when my fuel light did not work. As i too was sceptical if i could use all of the fuel in the tank but ultimately this fear was unfounded.

The pulse pump works on the vacum produced by the engine. At low revs the vacum produced is the greatest and therefore pumps a lot of fuel, causing "hunting". At high revs the vacum produced is the least therefore you will run lean. So to do away with this pump is benifical in both areas and eradicates this fluctuation in flow.

My bike ran extremely well with this modification, combined with a free flowing air filter; she produced 140 at the rear wheel and averaged high 40's to the gallon.

I know of many people who have done this and are very happy indeed and if i bought another 6r i would not hesiate in doing the same again.

stockcar · Posted: Sun Oct 12, 2014 6:13 pm Post subject:

never had any issue with my 6R and its always carb'd extremely well low down

2OR4STROKES · Joined: 12 Dec 2008 Posts: 67 Location: Singapore

Thanks .see the complication ..some run well with pump some without. Guess have to experiment to find out
_________________
Riding a bike is only as dangerous as your mind and level of training. The rest is up to God.

sb8rs · Joined: 05 Aug 2011 Posts: 150 Location: London

2or4
Why not try?
You are obviuosly not happy with the current running of your bike.
It will not cost a lot plus the fact you can always put the pump back if you are not 100% satisfied with the outcome.
For me a no brainer.