would they not be a waste on a road bike ? I've heard you need to keep the bike on the boil to take advantage of them and there is a price to pay for any power gains loss of mid range , boggy throttle low down , a total pain in the ass to tune , waste of time if you ask me
Depends on the bike. On an earlyish 400, something that needs to be kept above 5k rpm before you get anywhere slowly, they make a huge difference. I was offered some the other day for 300quid. I wish i had 300 quid.
Waste of time n money if your after power gains. Flatslide (not side) carbs link the throttle directly to the slide, insteat of the carb taking care of its movement. Designed to give bikes more instant throttle response. They wont offer much in the way of power gains. Great if you want a switch for a throttle. Your better off boring the engine, fitting a turbo and adding nitrous......
Kin ell lee , don't go giving him ideas like that ! , jeez . It's s CBR 600. Cat d ! It's getting a blade engine , 36 mm mikuni flat slides, £800 worth of eBay mods , and a full front brake braided line conversion , all that with a nitrous oxide or turbo , we would never see this man again !!! Hmmmmmmm, you go get em smudge ASAP
Ive come to realise that sensible doesnt work with smudge. So im going to imagine im in his world when I answer. Ive a garage full of lsd so it shouldnt be too difficult.
Just seen a set on ebay no bids on them was thinking is it worth getting them if got cheap enought Sent from my C6903 using Tapatalk
Unless you've spent a fortune getting them set up properly (and continue to keep spending on them to keep them in tune!) the only real benefit is at full throttle. Or all carbs have a butterfly on a spindle, which controls how much air goes into the engine. As you twist the throttle grip, the spindle turns and the butterfly opens but even fully open, the air flow has to go around the spindle. With a flat slide, when you turn the throttle, it lifts the slide so at full throttle, with the slide out of the way, there's nothing to restrict the air flow. That's the simple part..... It gets a bit more complicated when you need to add fuel to the air. The carburettor also controls how much fuel is mixed in with the air. Most carbs do this by having a hole for the fuel to come through (the jet) which has a tapered needle in it, restricting flow. The more air going through the carb as the throttle opens, the more fuel is also needed. On a flat slide, the needle is at the bottom of the slide, with the jet underneath. As the slide lifts, it pulls the needle further out, so more fuel can get out. On a normal carb there's usually some sort of piston which is lifted by the vacuum of the engine, with the needle and jet. From a purely theoretical side, the flat slide is the most efficient, but it all goes tits up when theory meets the real world. If you crack the throttle open on a flat slide too quickly, it takes a split second or so before the fuel flow can match the air flow, so for a short while, you get a lean mixture and the engine struggles. With a normal carb, it doesn't matter how fast you open the throttle, as it's the engine vacuum controlling how fast the needle comes out of the jet, so the engine gets what it wants at the right time. Flat slides work on a race engine, where the whole environment is different to the road. In the real world, stick with what's on your bike.
Smudge, are these the carbs? http://www.ebay.co.uk/itm/Keihin-FC...pt=UK_Motorcycle_Parts_13&hash=item2ecfd1d2a2 If so will they fit? Have you checked at all?
I've got one on mine and it makes a massive difference but don't know if if would be the same on yours as mines a single cylinder
Pretty common on some crossers and supermotos. The ktm 625 and 660 smc's both use one. Lend themselves well to that type of machine (a single cylinder) Where your more either on or off the power. Helps pick up revs quicker.
Yes and no was just going to get opinions before I look.into fitment Sent from my C6903 using Tapatalk
I was going to say its a pretty common mod on supermoto's. Mine came with one as standard but I've rode the same bike without one (newer version) and it feels gutless. The carb gives it a proper kick
You don't get leaning if there is an accellerator pump on them. That is why a lot of things like little 125s, my CB250RS, my old Guzzi T3 have slide carbs (although not usually flat slides. A squirt of fuel to overcome the leaning when you open the throttle. Since the one on the RS is playing up at the moment I can confirm that real world riding can be a pain without them working. You need to be super delicate with the throttle and often actually back off a fraction to get the pick up. If you want to see what they'd do you'd get pretty much the same benefits by picking up an old Jap4 from the 80's set, as long as the spacing between carbs is right. Also the angle of mount onto the motor so they don't just dribble out of the floatbowls down the inlets. And bear in mind slides usually have a smaller diameter than CV to flow the same air mass, due to less restrictive design, so you would also probably need different inlet rubbers which could screw up the airflow into the cylinders too.
