You cant without replacing the coil. The 86 X2 coil did not have a rev limiter so if you want higher revs go for that. You could also fork out $400 and get a dales bad attitude ignition set up.
U need a cdi that has no rev limit
5800 rpm's
On obd2 the rev limiter is in the ecm and works by dropping off cylinders to maintain rev limit.
there is a rev limit setting in the ecm so you dont over rev the motor
Try buying an after market CDI from White Brothers or BBR. It will enhance power curve and will increase rev limit or remove it totally, depending on what product you choose to buy. And, It will give a stronger spark, so they say.
Hack the PCM. Removing or changing the rev limiter value in the prom.
Yes if your in park or neutral
Its 4K RPM's.
You might have to change your fuel filter.
No automobile engine will even run at 2 rpm's. The average engine idles at from 650-750 rpm's, and will easily rev to 5,000 rpm's.
the rpm right before it blows up
You can't but you can buy an aftermarket rev limter/cdi from several companies that raise the limit by 1000 rpms