GSXR750/1157 hybrid

[Kickstart]

Hi

Not so sure on the flat slides. Some get on with them but personally on the road I would rather lose 5~10hp and have a lighter throttle (less effort and so more precise, and also doesn't kill your shoulder on a long run).

Down side is that a set of slide carbs is a major expense to just give a try.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[temeluchus]

Pffft, if your manly and have muscles in your arms go flat slides.

Throttle is heavier but they do go very well with the engine.
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Some shite cruiser. Now with guns and FREEDOM!

[Kickstart]

Hi

Taking the Bandit to Cadwell and back (from Stafford) with a day taking pictures was pretty uncomforatable by the time I got home.

Will probably take the slide carbs off the Bandit and go back to the CVs at some point.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[temeluchus]

Thats why my i stuck bandit 36s on my 1100, and stuck the RS on the 7/11. Chuckle.
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Some shite cruiser. Now with guns and FREEDOM!

[Kickstart]

Hi

The RS40s might go on the GSXR11, but then that rarely does more than 2~3 miles at a time (length of a runway and back). But as its engine is stock it isn't worthwhile for now. Might 1216 it at some point which would make it worthwhile.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[temeluchus]

My 7/11 had a 1052 slabby motor. I had it rebored and fitted the 1108(or thereabouts, dont recall exactly) wiseco kit. I think the capacity increase didnt make much difference, but the increase in compression made it far more lively, not that it was exactly timid originally.
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Some shite cruiser. Now with guns and FREEDOM!

[Kickstart]

Hi

1127 to 1216 should be a bit more of a difference along with the increase in compression. If I do I will also get someone to do the head at the same time.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[sickpup]

RS40's are too big for the road. They shift all the power up the top end while removing the bottom and a fair chunk of mid range. The BST38's give almost the same power as the RS40's yet retain the mid and bottom end.

[temeluchus]

You could make an inlet manifold from 40mm polypipe and run a 1 3/4 SU?

Throttle would be very light and no balancing?
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Some shite cruiser. Now with guns and FREEDOM!

[Kickstart]

[temeluchus]

The SU is a CV? Should be pretty easy on the wrists.

I've seen it done, normally aspirated, on a Z750. I doubt the guy cared about power or weight. The bike certainly ran well.
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Some shite cruiser. Now with guns and FREEDOM!

[Kickstart]

Hi

SU is effectively a CV carb. But you will lose a load of performance and throttle response from using one. However if you want a cheap large single carb to go with a turbo then they are fine.

For the road I would put up with the small reduction in power from using the stock 36mm CV carbs, especially when it is easier to be more precise with them. A large crude SU has no advantages over the stock carbs just a load of down sides.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[temeluchus]

Lectrons? For the sake of being weird more than anything else.
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Some shite cruiser. Now with guns and FREEDOM!

[Kickstart]

Hi

Still just a variation on the slide carb theme. Same down sides as the RS40s but with some potential fueling up sides to address a problem that the Bandit doesn't really suffer.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[temeluchus]

I had a single 44mm lectron on my XBR500/650. The throttle was actually very light, certainly easier than the king kong grip needed for the RS rack. Four of them would still be pretty light next to the RS.

Tuning them is dead easy as long as your supplier knows what needle to start you on. I got mine from Paul Gast in the states, he was spot on.

The thing that put me off them for the GSXR was the price, they arent much cheaper than a set of FCRs, and the throttle effort on those is pretty easy, especially after the RS. I tried them out on a friends GPz900R, lovely carbies.
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Some shite cruiser. Now with guns and FREEDOM!

[Kickstart]

Hi

The FCRs are almost double the cost of the flat slides. Not sure I could justify that much.

If you want lighter throttles you can play with the springs in the RS carbs and then put up with them not closing consistantly.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[temeluchus]

They are nice though.

I did fiddle with the spring on the RS's. But I am a big gorilla so had the king kong grip to operate them without hassle.
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Some shite cruiser. Now with guns and FREEDOM!

[Kickstart]

Hi

Operating them is fine short term, although the weight of them means it is more difficult to be precise in operating them. Its after some time that the problem begins.

On the road the benefit of the extra 5% power is pretty irrelevant to me most of the time.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing