Ignition cut on bike engines?
Alez - 8/6/04 at 01:50 PM
Do bike engines cut the ignition if you reach a certain rpm regime? This is out of curiosity, I don't fancy just trying in case the answer is no
they don't 
I'm more interested in the kind of engine we have in BECs, jap fours 900-1300 cc.
Funny, in a Spanish forum called forocoches.com, somebody just started a thread about maximum rpm reached, lots of people take their cars to the
ignition cut limit (I've never done it and I'm not interested at all to be honest, also I think it's past the max output power regime
anyway so what's the point). Funny I'm holding the record anyway since BECs virtually don't not exist down here he he he
[Edited on 8/6/04 by Alez]
Bo - 8/6/04 at 01:55 PM
If you have a fairly new Bike engine (newer than 1980 that is) They have rev limiters.
For that kind of competition I think you would need to build with a Yamah R6 engine (~16.000 Rpm) or maybe the old Suzuki GSX-R250 (~20.000 Rpm)
Would be no good for anything else though
Alez - 8/6/04 at 02:10 PM
quote:
Originally posted by Bo
If you have a fairly new Bike engine (newer than 1980 that is) They have rev limiters.
For that kind of competition I think you would need to build with a Yamah R6 engine (~16.000 Rpm) or maybe the old Suzuki GSX-R250 (~20.000 Rpm)
Would be no good for anything else though
Interesting. How about 4 of those, one to each wheel?? I'm sure something like that must have been tried before!!
Bo - 8/6/04 at 02:16 PM
I suppose 4 Yamaha R6 engines would give you around 400-450 Bhp
(and one hell of a wiring loom to do... ) :cool
Go for it...... These engines are pretty cheap too. maybe buy 6 or 8 while you're at it.
[Edited on 8/6/04 by Bo]
Jasper - 8/6/04 at 02:31 PM
Alez - my ZX9 has a rev limiter and I regularly hit it. That's what it's there for
Mk-Ninja - 8/6/04 at 02:33 PM
Looks like Im not trying hard enough YET.
ChrisGamlin - 8/6/04 at 02:53 PM
Alex - the blade limiter will kick in at 11,750rpm, if you're not using it occasionally in the lower gears you arent trying hard enough
highspeeddirt - 8/6/04 at 03:30 PM
I hit the rev limiter in second on the way back from my first SVA. Everything happens so quick I find it hard to keep off the limiter
Steve
Alez - 9/6/04 at 08:53 AM
Well I should not try!! Here, were now have a modified motoring law and we can get fined not only for overspeeding but also for "sporting
driving" and "rash driving". The fines are quite high and obviously very subjective, which means you will get fined whenever the
officer feels like you should 
In other words: loud engine revving high may be OK or may not, but loud engine going from low rpm to high rpm very
quickly equals fine
spunky - 9/6/04 at 11:00 AM
quote:
Originally posted by Alez
Well I should not try!! Here, were now have a modified motoring law and we can get fined not only for overspeeding but also for "sporting
driving" and "rash driving". The fines are quite high and obviously very subjective, which means you will get fined whenever the
officer feels like you should In other words: loud engine revving high may be OK or may not, but loud engine going from low rpm to high rpm very
quickly equals fine
They're are ridiculous laws. From what I've found driving my car. If you want a silky smooth gear change have to rev the engine high up in
the range.
Slow throttle action and low RPM upshifts equals snatchy and the odd missed gear.
Wont be driving to Spain then.
John
Alez - 9/6/04 at 12:48 PM
quote:
Originally posted by spunky
They're are ridiculous laws. From what I've found driving my car. If you want a silky smooth gear change have to rev the engine high up in
the range.
Slow throttle action and low RPM upshifts equals snatchy and the odd missed gear.
Wont be driving to Spain then.
John
It's not as bad as it sounds 
I totally agree that it's good to use all the rpm range from idle to red, and here it's not a problem
to do it.. (yet?), all bikers do. The problem may come if you put your foot down and cover all that range in miliseconds, that is if you demand high
power (which is also what makes the engine sound very loud, especially when you are reaching high rpms).
The odd thing is the fact that they can fine you whenever they may fancy and not when they prove you were doing something wrong (like overspeeding).
"Sporting driving" or whatever the proper translation should be is absolutely subjective and can be used as an excuse anytime, and
that's bad.
Also note that Spain is a really really nice place to take these cars to as the weather allows to drive them daily most of the year 
[Edited on 9/6/04 by Alez]