Rev Limiter

[jesseclarke]

Can anyone tell me if the XJ600N (X plate 2000 model) has a rev limiter fitted. The reason I ask is that on a couple of occasions when accelerating a little harshly, my engine dies at around 10000 rpm. As soon as I change up a gear normal service is resumed. I realise that 10000rpm is well into the redline, but it isn't something I do on a regular basis. On the two occasions I can recall this happening, I was two up. I don't know if this is relevant. Your comments would be appreciated.

Thanks

Jesse

[Welsh Ade]

Well not experianced on my 95 D6 but I have gone occasionally into the redline area but nothing about loss of power at 10k rpm you do get that at top end range.

Perhaps as you were two up the extra weight could impact this?

[m40man]

Jesse - You're quite mad you know .

As the bike redlines at 9500rpm, & your power is already dropping off before this, why thrash the do-dahs off it?

The best you could hope to achieve is no bounced valves.

I'm all for encouraging a little enthusiam - but changing gear will protect your motor & result in a quicker ride.

[Ghoti]

I think rather than a rev limiter, it is probably just the spark plugs / HT leads / coil whatever could not produce enough sparks per minute to keep the engine going (That's my theory anyway).

[olddivvy]

Sounds like you hit the engines natural rev limiter; the valves don't close porperly against the seats resulting in lost compression. As said earlier, really no point in going here and can result in damage.

Simon

[billywhizz]

HEY...
the 600 s have a rev limiter, and it just cuts in around 10k and it feels like you've lost two cyclinders !

agree with M40man though, just shift up a bit quicker.and you'l be fine.
if it does cut in just flick the gear shift up, (no clutch) and hold on hehehe

[CD]

jesseclarke said:

On the two occasions I can recall this happening, I was two up. I don't know if this is relevant.

Just a guess... but possibly it was not the same pillion person on both occasions you hit the rev limiter. And, right now you dont take a pillion because they both somehow always find someone else to ride with.

Only kidding, but to be honest when I've got the extra weight and responsibility of a pillion I dont cane the bike. OK, a Ciggie 125 would cause me to break my rule but not a D6.

[General Gman]

chirodave said:

jesseclarke said:

On the two occasions I can recall this happening, I was two up. I don't know if this is relevant.

Just a guess... but possibly it was not the same pillion person on both occasions you hit the rev limiter. And, right now you dont take a pillion because they both somehow always find someone else to ride with.

Only kidding, but to be honest when I've got the extra weight and responsibility of a pillion I dont cane the bike. OK, a Ciggie 125 would cause me to break my rule but not a D6.

A divvy 6 needs caning one up, let alone with someone on the back - mine spent it's life between 7 and 10k revs - doesn't hurt it a bit.Mine never had a rev limiter tho, it would rev to 11k easily.The FZR does have a limiter, tho' - and it's useful to have a bit of over-rev so you can hang onto a gear round bends.

[Ghoti]

billywhizz said:

HEY...
the 600 s have a rev limiter, and it just cuts in around 10k and it feels like you've lost two cyclinders !

I think it is what Simon said (and I sort of did, but for the wrong reasons ). The engine just wont rev that high. There is nothing built in to limit revs as far as I know.

[billywhizz]

sorry Ghoti me old mucker,
but me 600 defo had some form of limiter on,
me car has ,
and the fazer has too !!!
get past the red line and the things just splutters/ stutters..
try 11500rpm on the fazer and you'll see what I mean.
There must be some electrical gizmo, for fuel starvation ?? to stop you blowing it up, i imagine.
but don't hold me to that one !!

[General Gman]

It just cuts the ignition to stop it revving past a certain point.it'll sit at the limit happily, but will go no further.

[2old2boogie]

My Fazer 6 has a rev limiter 2 up, and my Divi 9 had one. In fact all my bikes have had a rev limiter 2 up!

Her name is Eileen!

[Doofer]

Jesse, I certainly does sound to me like you've found the rev limiter, the bike appears to dies off (as if you've lost a couple of cylinders or are just going onto reserve) but when you change up a gear all returns to normal until you hit that rev range again.

All 3 of my 600s have had a rev limiter, but they all seem to have been set at slightly different revs.

The J reg rev limiter used to kick in at about 11,500 rpm (mind you that bike moved well too, I think it had been tinkered with)
the Grey L reg kicks in at about 11,000 rpm
and the Turquoise R reg kicks in at about 10,500 rpm

Imported bikes or ones which have had the clocks changed for some reason may well have the rev limiter set to very different revs or even appear to be missing (IIRC its a microchip in the clocks, so can be replaced)

The rev limiter is there to protect the engine from damage by revving it too hard, however, so long as you aren't revving it to the rev limiter in neutral or with the back wheel off the floor (definately not recommended, too much scope for a mishap there) then there is no reason not to bounce off the rev limiter occasionally.

Doof