VTEC
 

I'm sure I read somewhere that the next generation 645cc V-twin in the SV would have VTEC. I'm sure it supposed to be around by now. Does anyone now about this or am I making this up.

Why have VTEC? No purpose I can think of. An answer to a question no-one asked. And on a small engine? Especially a revvy one? Adds complexity, increases service costs,

A V-Twin motor having VTEC? - it wouldn't even work.

They have been looking at it.

Indeed they have.Ducati have been trying for years to develop the ultimate holy grail of vtec;electronic valves.Using an electro magnet to open and shut the valve gives infinite adjustment and less frictional power losses.They can't make it work yet though.

Suzuki had a test motor up and running last year but it was just that and, as far as I know, costs were prohibitve for a 'cheap'bike such as the SV650.

Why not?

.

crikey... can u imagine, an sv motor reving to 16k.... still producing enuff power to pull power wheelies.....

sounds like fun actually....

I don't think the idea of VTEC is to make an engine rev to infinity and back. I thought it was to optimise the efficiency over the available rev range instead of making compromises over part of it.

If im honest i know little other than it works on the cams i think.....

However cars like the accord type r the, s2000 etc all have vtec and rev to motorbike type rpm's, with a lot of the power being at the top end,

i think vtec utalises the fact that standard engines can reva a lot higher than most manufactures allow, as the ports can only allow so much exhasting.....?? soa different cam takes over? with higher clearances??? :?:

this is bassed on last weeks brown trouser moment in my collegues new accord type r v tec.. notheing untill 5000 rpm then boom.... takes off like a rocket..... till about 9000 rpm..... bit liek a t strke really, just a lot more expensive.... impressive non the less...

The new honda CB1300 has v tec.. Bike were very impressed with it....
quite fancy one meself... :)

Yep. The cam has more than one profile and in a certain rev range the cam is shifted from one profile to another and in turn changes the opening and duration of the valves.