FJ1200 vs FJ1100 rev limiting

[Bozo]

I apologize if this was asked previously.

Does the FJ1100 CDI have the same rev limiting as the 89 FJ1200 (10,500rpm I think).

If not can a CDI from an FJ1100 plug directly into FJ1200 connectors.

[wainot-Phil]

Hi ,,I have no idea about the rpm limit on the CDI units ,,
but I can tell you that the CDI Units  are not all the same ,,
from the 1984  FJ1100 to the 1987 FJ1200,,the Bikes ran a  ""Analoge"" CDI Unit ,,
from 1989 FJ1200 to 1996 FJ1200,, the Bikes ran a ""Digital"" CDI unit ,,
The ignition pick ups inside the left side cover are different as well ,,, Analoge pre 87  and Digital their after ,,
hope that helps ,,

[ribbert]

I apologize if this was asked previously.

Does the FJ1100 CDI have the same rev limiting as the 89 FJ1200 (10,500rpm I think).

If not can a CDI from an FJ1100 plug directly into FJ1200 connectors.

Bozo, why are you worried about rev limiters. With the FJ being a long stroke motor, there is a VERY good reason why you shouldn't rev it past redline, beyond that it has finished making power anyway so why would you want to?

Piston speed of an FJ engine at 10,500rpm is greater than an F1 engine doing 18,000rpm and piston speed is the limiting factor that every engine builder is bound by. The problem with exceeding that speed applies to all engines regardless, it is not FJ specific.

IMO

Noel

[Bones]

This has been discussed before with differing views, some were from memory 10,500 some were 11,000 some couldn't even find one. Even the lowest one at 10,500 is 1000 revs over the red line which to me defeats the purpose, if it's going to have one it should be set to cut in at the red line. I've taken mine up to around 10,000  but mechanical sympathy prevented me from revving any higher to try and find some limiter.

[Bozo]

Thank for your replies, I was only curious. After porting the head with a high compression in the first two gears I do hit the rev limiter very quickly, I now have a speedhut tacho that lights up at 9,500rpm. I don't hold the revs for the sake of revving it actually hits the limiter under power. I agree I should keep it around 9,500rpm max, so sue me I like a drag here and there. Phil your answer is what I was looking for, thankyou

[FJmonkey]

I now have a speedhut tacho that lights up at 9,500rpm

\
Does Speedghut know that in 3rd gear (wide open throttle) on an FJ you are hitting the Kookaloo zone? Damn right it should light up...

[Bozo]

I now have a speedhut tacho that lights up at 9,500rpm

\
Does Speedghut know that in 3rd gear (wide open throttle) on an FJ you are hitting the Kookaloo zone? Damn right it should light up...

Better than bending the needle

[Bones]

Thank for your replies, I was only curious. After porting the head with a high compression in the first two gears I do hit the rev limiter very quickly, I now have a speedhut tacho that lights up at 9,500rpm. I don't hold the revs for the sake of revving it actually hits the limiter under power. I agree I should keep it around 9,500rpm max, so sue me I like a drag here and there. Phil your answer is what I was looking for, thankyou

John, don't get the impression I was bagging you about thrashing you engine because that's not the case, Rev limits were discussed here some time ago with varying results. Don't worry, I give mine a good thrash now and again just not enough to hit the limiter that's if it even has one.

[Bozo]

Thank for your replies, I was only curious. After porting the head with a high compression in the first two gears I do hit the rev limiter very quickly, I now have a speedhut tacho that lights up at 9,500rpm. I don't hold the revs for the sake of revving it actually hits the limiter under power. I agree I should keep it around 9,500rpm max, so sue me I like a drag here and there. Phil your answer is what I was looking for, thankyou

John, don't get the impression I was bagging you about thrashing you engine because that's not the case, Rev limits were discussed here some time ago with varying results. Don't worry, I give mine a good thrash now and again just not enough to hit the limiter that's if it even has one.

oldktmdude is a bad influence on me

[oldktmdude]

oldktmdude is a bad influence on me

How did I get involved in this? I've been quietly watching from the sidelines.
John, you need to spend some time down here with us, then I may become a bad influence on you. How's Queensland treating you?
Sorry I didn't get to spend more time with you during the Rally, time just seems to disappear at events like that. We'll have to make up for it at Mudgee next year. 
   Regards, Pete.

[Bozo]

oldktmdude is a bad influence on me

How did I get involved in this? I've been quietly watching from the sidelines.
John, you need to spend some time down here with us, then I may become a bad influence on you. How's Queensland treating you?
Sorry I didn't get to spend more time with you during the Rally, time just seems to disappear at events like that. We'll have to make up for it at Mudgee next year.  
  Regards, Pete.

Pete, I'm jealous listening to stories of your bike and the fact that you never take it above 3,500rpm (above the redline) Glad to hear from you mate at least you know what I'm talking about. I hope I have time for the next rally.

[Bozo]

Thank for your replies, I was only curious. After porting the head with a high compression in the first two gears I do hit the rev limiter very quickly, I now have a speedhut tacho that lights up at 9,500rpm. I don't hold the revs for the sake of revving it actually hits the limiter under power. I agree I should keep it around 9,500rpm max, so sue me I like a drag here and there. Phil your answer is what I was looking for, thankyou

John, don't get the impression I was bagging you about thrashing you engine because that's not the case, Rev limits were discussed here some time ago with varying results. Don't worry, I give mine a good thrash now and again just not enough to hit the limiter that's if it even has one.

Bones , I'll PM once my bike gets to brisbane. Hope you show my some good roads