rev limiter?

[MaybeGuy]

yes, point and laugh... another CB400 superdream thread.

my problem THIS time is i think the rev limiter is set to 6krpm.
if i rev the bollocks off it, it bounces on 6k. ANNOYING when riding it.

anyone got any super cool tips for someone who doesnt know anything about tackling the adjustment of a rev limiter or what one looks like or ANYTHING about them apart from they're annoying if set wrong?
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Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!!
Kickstart wrote: Hi I tend to agree with Matt. All the best Keith

[veeeffarr]

Would a superdream have a rev limiter? :S

[Wafer_Thin_Ham]

I thought the limiter was hard wired into the CDI, so it can't be changed easily.
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[MaybeGuy]

bugger. why would it be bouncing off 6k then? :S
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Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!!
Kickstart wrote: Hi I tend to agree with Matt. All the best Keith

[Jamie S]

Sounds like the timing is set wrong.

[MaybeGuy]

reckon if i ripped one off a cb250 it would work?
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Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!!
Kickstart wrote: Hi I tend to agree with Matt. All the best Keith

[Wafer_Thin_Ham]

What a CDI??

Why not just reset the timing.
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[MaybeGuy]

a 250 CDI doesnt work, just toiled for 10 mins in the rain to get angry splutters so i swapped back

how would i reset the timing?
(i can build the things, but adjusting them is new to me )


just so im sure, a CDI is the little box under the tank opposite the box the spark cables are attatched to?

cheers
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Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!!
Kickstart wrote: Hi I tend to agree with Matt. All the best Keith

[Wafer_Thin_Ham]

i really couldn't tell you tbh. Sounds about right though.

Did you do any work on the bike before it started stuttering at 6k?
only way the timing would get out of whack would be if you'd had the cam shafts out.
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[MaybeGuy]

the top cover on the engine is different to the rest, so it may well have had the cam shafts out.
it isnt a sudden problem, its been there since i got the bike.

i take it its not as simple as pressing a 'reset' button is it?
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Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!!
Kickstart wrote: Hi I tend to agree with Matt. All the best Keith

[Wafer_Thin_Ham]

nope, i think it involves taking the cams back out and putting them back in the correct position. That is assuming it's the timing. Although i'm not sure what else it could be.

CDI perhaps? Coils?

Sorry I can't help you more mate.
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[MaybeGuy]

bugga, ah well, ill sort it out some other time.
cheers for the help.
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Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!!
Kickstart wrote: Hi I tend to agree with Matt. All the best Keith

[Blau Zedong]

A pooperdream doesn't have an electronic rev limiter.
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18:54:48 Rob Fzs: jews don't give away stuff for free

18:54:59 Rob Fzs: unless its their clothes/ hair/ golden teeth

[Davo]

Is it an jap import? If so have you been messing around with the restriction wires? (e.g. the ones in the back of the speedo that kicks in at 180kph)

Had a similar issue on the CB-1 when I tried to derestrict it on the cheap, only to find it would stop accelerating at 6,000 rpm.

[Kickstart]

Hi

If it is a proper old CB400N Superdream (Wetdream, Nightmare) then first thing is to check the rev counter is reading correctly.

Cam timing could be out, but only likely if someone has taken it to pieces and put it back wrong.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[Blau Zedong]

The rev counter is mechanical AFAIK.
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18:54:48 Rob Fzs: jews don't give away stuff for free

18:54:59 Rob Fzs: unless its their clothes/ hair/ golden teeth

[MaybeGuy]

yes, the rev counter is mechanical, got one of those groovy spinning cables

i dont think its reading wrong, because i physically feel it lurch forwards as it gets to 6k.

if someone has put it back together wrong, would that still be the case if it revs perfectly up to 6k?
ive ridden bikes with rev limiters on before, and it feels exactly the same, im just not sure how the rev limiter works.
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Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!!
Kickstart wrote: Hi I tend to agree with Matt. All the best Keith

[Kickstart]

Hi

Mechanical ones can be inaccurate.

It would likely run poorly at low revs as well if the cam timing was out.

Might be worth going somewhere with nobody around, stick a timing light on the bike and try revving it in neutral. See if either plug is cutting out once past 6000rpm.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[MaybeGuy]

thanks kickstart, ill try and get hold of some of them.

it revs out at 6k in neutral and in gear.
if one spark isnt sparking past 6k, would that suggest bad plugs?
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Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!!
Kickstart wrote: Hi I tend to agree with Matt. All the best Keith

[MaybeGuy]

ok, im now beginning to steer away from the idea that it could be cam timing...

rather than at high revs it spluttering, its doing it as i turn the throttle more.
eg: if i go very slowly from 1000 to 6000 its ok, but if i fully neck it it bogs down and struggles for 3000.

this suggests a fuelling problem/air intake right?
i dismantled my airbox and had a lil' ol' lookie.
what i found was another smaller filter inside the filter. this was damp... normal?? it smelled a bit like petrol, not entirely though.
are air filters supposed to be 100% dry?
i also took out the metal mesh gauze covering the carbs because i checked my choke wasnt stuck, cant get the bassard back on
any ideas? it seems physically impossible!
it wont affect the bike, so im not too bothered.
cheo
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Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!!
Kickstart wrote: Hi I tend to agree with Matt. All the best Keith

[bish777]

blocked filter would cause your problems.

I'd not run the bike without the airbox for now as thats swapping one problem for another.

Get the airbox on and try taking it for a spin without the filter, if the bike runs properly youve solved the problem.
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GSXR1100J

[Jamie S]

! NEVER RUN A BIKE WITH NO AIR FILTER FOR MORE THAN A FEW MILES !

[hmmmnz]

OK JAMIE

first thing i would do would be change out the plugs for new ones, then if still being a pain, see if one side is still cutting out.
change the coils over and see if the other side is cutting out, if it is then its a coill issue and best bet is to replace the coil,
if its still the same side with the coils swapped then have a look at the wiring,
make sure you are getting good contact at the join where the 2 coils get there power.
ill post a super dream diagram in a bit
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Wiring Diagrams BIDNIP it bitches

[bish777]

[bish777]

It may be a good idea to replace the coil(s) as a matter of course, its an old bike now.

Pattern coils are pretty cheap.

If the HT leads and caps are quite a few years old they are bound to be breaking down!
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