Exup Cables

whats wrong with ya cables dean??

 

I reckon you just leave you exup open i did it and i got a great improvement in th power band range and plus a great sound <!-- s --><img src="{SMILIES_PATH}/icon_smile.gif" alt="" title="Smile" /><!-- s -->


well its up to you

 

I'd suggest keep looking, or as shandu said just keep the exup open (you will lose some low end - sub 8000 rev - power but the rest will be as good or better).

I have always considered trying this - going into a bicycle shop and asking if they could make up a set or match a set of bicycle brake/gear cables to the length of the exup cables. They are about just as thick. Would they work? Maybe I'm just being too optimistic.

 

I have previously taken just regular wire and 'wired' it open. There is no right/wrong I guess. I unhooked the exup cables (I left these dangling out the bottom of the bike), moved the fork on the exup valve to the top (so it was fully open), took my wire and wrapped it until it was quite well wrapped around the exup valve, and then found somewhere to hook it to and wrapped it quite solidly around that. Never closed on me. I also had to take wire cutters to unhook it because I wrapped a little to vigorously.

You may notice a slight increase in fuel consumption simply because there is no backpressure and thus fuel/air mixture is more free flowing, but I would doubt if it will be too substantial.

 

gday guys,
if you want cheaper cables you can always try going out to bankstown airport and asking the workshops there if they can make you the cables.
all aircraft use cables of some sort on them and most all workshop make new ones when the ones on the planes become U/S as its too expensive to buy new ones. all aircraft parts are tax free too. so this also brings the price down.
as for removing the cables completly.....Yamaha spend millions on research and development for their products, so if the bike runs better without exup then they would have removed it. the new R1's and R6's have exup so it must make a difference. if not in performance then it may be in the tuning of the bike. without it the bike might run hotter or colder which then can reduce the life of the bike. this is just my opinion. its there for a reason.

 

Great tip on the cables!

As for removing the exup: It will make the bike run cooler simply because the exhaust escapes easier. The exup primarily just gives better low down performance. The r6 and r1 still have it because it is assumed that they will want the better low rev performance for commuiting and stuff (rather than revving the engine to 60% or more redline each time). Honda and other manufacturers have created a similar valve in some of their sports bikes. So yes, the exup is quite valuable for everyday riding (though the effect it has on the 250 has to be minimal... it only has 40 horsepower to start with)

For racing it is better without the exup because you want the max power band, and this is acheived most times by increasing the air/exhaust flow which means removing the exup. Fzr, r6 and r1 racers their exup valve because it will save weight (after market full exhaust systems tend not to be exup compatible either), and also promotes freer air movement.

As for actual life of the bike- I have no idea.

 

nice to here that your enjoying it.

 

Dean, glad you are back riding.

Quick question - you say you wired the servo motor??? That should stay free flowing (else you can blow it). You should wire the actual valve in the exhaust open.

 

so whats the concluesion Dean? telll us what you think about the exup valve being fully open at all times.

 

yup. you wired the valve and not the motor (good). Wiring the servo motor open wouldn't do anything actually (except put strain on the servo motor).

 

there is not that much power in that range of 3-6k rpm, so that could be it. The fzr doesn't really have any usable power until 6k or more. However I don't feel like the bike is going to choke in that range - I usually shift down before that happens and on the easy starts I let the clutch out gradually so that I am above 6000 most of the time.

 

ex- up cable repair

hey guy iam new to the site , i have recently brought a fzr and also found that the ex-up strectch and and ready to snap . it was frayed down to the last couple wired strands right where the the cable connects to the little knod on the end

but any way the point is that there is no need to buy new cables , all i did was cut the knob of the cable drill a hole in the knob and thread the cable back in , i tried to solder the it back in but the solder woulnt stick but the knod is just lead anyhow so you can melt it a bit and it will stick to the cable but when i do this again i will try and use a resin glue like arodite . i made the cable a touch to short <!-- s:-? --><img src="{SMILIES_PATH}/icon_Eyecrazy.gif" alt=":-?" title="Eye Crazy" /><!-- s:-? --> .. ah waht can you do

so now i am just going to buy a push bike cable , i will remove the wire part of it and use the original cable runner (the black thing around the wire ) off my bike and hopefully get the length right

know that my explanation is a hit hazy but any Q,s just email me <!-- e --><a href="mailto:sandshark100@hotmail.com">sandshark100@hotmail.com</a><!-- e -->
hope this help some of you out
ps i have a digital cam and i can send some pics to help out if you get stuck

 

great tip! And welcome to the site.