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Does it have a rev limiter?

Started by YamaHammerYT, July 07, 2016, 03:56:39 PM

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gumby302ho

 When I first got my 86 I was blowing shifts left right and centre(kookaloo shifting) like a fighter that cant find his range in a brawl  :lol:. Anyway I asked about the rev limiter on the FJ's cause I have never had mine kick in and I dont like to admit this but I have over reved the piss out of it easy 12500rpm and the limiter has never hit. I find my 86 laughs at me around 9 grand and begs for more. Also happy to say my shifting is much better and my timing is tight, I think my issue was overcoming the acceleration as I have never rode a plus litre bike before and I come from the dirt world hence my timing was horrible on the street machine. I find it is very hard when I ride my FJ not to ring its neck to make up for all those lost years when I could never have or afford one and only could dream and stare. I know I am not the only one.

Troyskie

Conclusive proof the rev limiters are real, but sometimes don't work.

At last years' shed day we had a number of bikes on a dyno.

After that, on a different day we had some of the same bikes on the same dyno.

Mine has a rev limiter that kicks in about 9.5k, others don't kick in that early and revved all the way that the dyno tech was prepared to take them. http://www.fjowners.com/index.php?topic=14208.135

This was confirmed by the dyno tech who out of the blue called my bike out has having a rev limiter, when the others in his opinion either didn't, or was a lot higher than he was going to go. :bomb:

Troyskie.
1984 FJ1100 Ms Effie brand new :)
1984 FJ1100 Pearlie, stock as.
1985 FJ1100 Mr Effie 647,000K and still running hard.
1985 FJ1200 'Yummy' takes a licking & keeps on ticking
2013 Trumpy Tiger 800, let's do another lap of Oz

After all is said and done, more is said than done :)

Burns

I'm thinkin' the "rev limiter" is valve float.
There's nothing you can do that can't be done.

Troyskie

Whoops, forgot to mention, once the rev limiter kicked in on my bike, the tacho kept going up past the 10k mark.

Previously, on the road I thought I didn't have a rev limiter as I'd seen it up near 11.5k, but the multiple dyno runs were conclusive by their consistency.

I ignore the tacho at these revs, it clearly is not correct. Interestingly, the limiter kicks in consistently, whilst the tacho is still rising. I would have thought the tacho takes its info from the same source as the rev limiter.

I now shift by feel/sound (& occasionally by mood  :wacko2:). I wouldn't even look at the speedo if I didn't need a license  :sarcastic:.
1984 FJ1100 Ms Effie brand new :)
1984 FJ1100 Pearlie, stock as.
1985 FJ1100 Mr Effie 647,000K and still running hard.
1985 FJ1200 'Yummy' takes a licking & keeps on ticking
2013 Trumpy Tiger 800, let's do another lap of Oz

After all is said and done, more is said than done :)

gumby302ho

Quote from: Burns on July 20, 2016, 02:35:14 AM
I'm thinkin' the "rev limiter" is valve float.

I can say that I have floated a few valves in my day but the FJ seems like a Jugger-naught of an engine, I have over rev-ed which I have mentioned many times on here and I have never heard the valves float even past 12 grand, believe me I dont enjoy my 1200 cc mill at 12 grand but to me these yamaha inline four's are tough as a chevy 350 or a 302 ford a cummins diesel and for you dodge fellas the old slant 6.

Urban_Legend

Having a look at the parts diagrams I found this (please see pic) This was for the 85 Fj1100. This part is NOT listed for the 1200's.
Mark
My Baby (Sparkles)
84 FJ1100/1200 motor
92 FJ 1200 - Project bike. Finished and sold.
84 FJ1100 - Project bike.

FJmonkey

I wonder why a rev-limiter allows the revs to continue up, or at least the RPM indicator to climb when the RPMs are limited? When my power is limited and the revs keep going up it has been clutch slip. But not a cut in and out of power. Just the engine winding up higher with no Kookalooo...
The glass is not half full, it was engineered with a 2X safety factor.

'86 Ambulance - Bent frame, cracked case, due for an overhaul
'89 Stormy Blue - Suits my Dark Side

balky1

Clymer manual's wiring diagrams show the limiter for '84/'85 UK models (European models in general).


FJ 1100, 1985, sold
FJR 1300, 2009

ribbert

Quote from: FJmonkey on July 25, 2016, 08:36:19 PM
I wonder why a rev-limiter allows the revs to continue up....

I wonder too.

Noel
"Tell a wise man something he doesn't know and he'll thank you, tell a fool something he doesn't know and he'll abuse you"