Running without the exup valve?

[MarkT]

In a post about my fzr troubles someone said not having a exup valve could be part of the reason it does run terrible, mine has been removed and just has a bolt where the pulley used to be!
Does anyone else run without the exup? Would it make my bike nearly unridable under 5k and them the power cutting in with a vengeance after 5k?
Thanks
Mark

[Hogdigerdy Dog]

it could,
but it depends what you call unrideable ?

with no exup valve it wouldn't have much low/mid range power but should still run fine if a bit sluggish
the exup is not fully open until about 7K rpm but the real power is after 10K rpm with a big kick in the pants at 12K rpm onwards ,
these are awesome little bikes but are designed to rev and then some, hence the exup to give a bit of low / mid range power for road use,

i'd go with the exup and see how it runs,
unless you intend racing it,

[MarkT]

Thanks this is for road use only so might have to save up for exup. It really is like being on a buck and bronco!

[Hogdigerdy Dog]

post in the wanted / for sale section, someone might have one gathering dust on a shelf

sounds like you've already got the right headers and if you have the exup servo fitted (black thing under the tank L/H side on a bracket) then you'll only need the cables about £25 from Mr yam, search on here and make em yourself for about a 5er

[MarkT]

Thanks so much! Cables and servo are still there (at least I think I can hear the servo) so would just need the exup assembly!
Regards Mark

[Evilchicken0]

Have a bit of a play with posting pictures then show us the bolt where the exup is.

P.S. where abouts are you ?

[MarkT]

Do not know how to post pictures yet but if you imagine taking the outer cover off you should see a pulley with the cables around it. This would be connected to the valve inside the exhaust. Well that pulley is gone and replaced by a bolt. No valve just a way to stop exhaust leaking out of where the exup used to be!
Make any sense now?
Regards Mark

[Evilchicken0]

Yes that makes sense.

I noticed Nick had some pipes for sale he might have the exup in it

[MarkT]

Thanks it's something I will do but I don't think it runs so badly just because of that? Do you agree? Think I need to get it running better first then start doing these jobs ? Funny trying to get some standard carbs off nick at the mo and make a good set out of two!
My pm"s are sticking I'm my outbox and not going anywhere. Don't suppose you would be a wizard with that swell?

Regards mark

[Evilchicken0]

It means the forum member hasn't read those messages yet, they stay in your outbox until they're read