tank spacers

[01 sv650s]

do tank spacers do anything. if i fitted them to my curvy would i notice any difference. thanks

[jimmybluedevil]

Its one of the things at the top of my future mod list. Ive heard that spacers make a huge difference in performance but Im not sure if the increased air-flow would lean the mix out too much.

[r4ce_e3nd]

you will feel something but don't expect much dho...

but it is a cheap mod and easy to do, so why not?

[instigator]

Make them yourself. I plan to. :)

[northwind]

If you're rejetting/mapping anyway, then yep. On mine it was worth one extra jet size up top. Not sure what that would equate to in power terms, not very much, but it'd be daft not to take advantage unless you have an aesthetic objection (it does look a little ugly)

[svrash]

I've got some 25mm diamiter black nylon bar that i'm making some 25mm spacers out of...for £3 i can do you a pair 8) PM me if your interested :wink:

[northwind]

I got Chewy's, because they're purty. Doorstops would work :)

[r4ce_e3nd]

I've got a pair of aluminium made on a turning late 8)

hight: 10mm

[Demonz]

I used some brass plumbing washers from homebase and with some longer bolts. A*se dyno didnt show any improvements - and I am truly doubtful of any performance at all from it. My big benefit was my legs actually fitted under the tank better - it lifted it just enough to get a knee in the groove - made hanging on around corners easier.

[Razor]

Forget performance, makes a better induction noise 8)

[northwind]

If you fit them without any other mods, then no, no power boost. The restrictive point on the stock SV is the filter, not the tank/airbox restriction. The only place it makes any difference on mine is at high revs, mind.

Incidentally, you can take the sound deadening foam out from under the tank, that has a similiar effect.

[r4ce_e3nd]

Incidentally, you can take the sound deadening foam out from under the tank, that has a similiar effect.

or both as I did.

if his is running too rich it will run better now, I asume?

[northwind]

I doubt it'd make that much difference with a stock filter, but I never tried it that way to be fair.

[hovis]

TANK SPACERS :shock: not heard about these where do you get em, i have a k&n would i have to do anything to the carb if i got some??

[jambo]

On the '99 - '02 curvey SV 650 the air is drawn in on the top of the air box through the filter so the air has to flow through the gap between the underside of the tank and top of the air box so adding a pair of spacers (effectively really thick washers) to the front 2 tank fixing bolts raises the tank and therefore gives more space and a slightly better airflow into the air box.

On the K3 onward SVs the air is drawn up from the underside of the air box, so this would make no difference at all.

[Mr Toad]

On the K3 onward SVs the air is drawn up from the underside of the air box, so this would make no difference at all.

not quite :wink:

it is actually drawn in through the 'snorkle' - see here

http://premium1.uploadit.org/MrToad//Snorkle.JPG

it comes out of the hole in the front of the airbox -

http://premium1.uploadit.org/MrToad//Airbox.JPG

this can be easily removed with a good tug (can be refitted as well)

lots of induction noise, expecially when fitted with a tank raising kit :twisted:

[jambo]

not quite :wink:
it is actually drawn in through the 'snorkle' - see here
this can be easily removed with a good tug (can be refitted as well)
lots of induction noise, especially when fitted with a tank raising kit :twisted:

Ok I'll rephrase: There will be no benefit at all to the airflow from raising the tank on a K3 onwards bike, but you may get a louder, pleasing noise. Also note some people have reported that without the snorkel water can get into the airbox and air filter. :wink:

[Razor]

Yeah baby induction roar! 8)

[thor]

I just got a SV1000 snorkel.

[hovis]

I've got some 25mm diamiter black nylon bar that i'm making some 25mm spacers out of...for £3 i can do you a pair 8) PM me if your interested :wink:

will i need longer bolts?

PMed

[Nashwan]

not quite :wink:
it is actually drawn in through the 'snorkle' - see here
this can be easily removed with a good tug (can be refitted as well)
lots of induction noise, especially when fitted with a tank raising kit :twisted:

Ok I'll rephrase: There will be no benefit at all to the airflow from raising the tank on a K3 onwards bike, but you may get a louder, pleasing noise. Also note some people have reported that without the snorkel water can get into the airbox and air filter. :wink:
So there's no danger of it running lean? Would that only happen if you fitted a better air filter?

[jambo]

So there's no danger of it running lean? Would that only happen if you fitted a better air filter?
I would doubt it would have any meaningful effect on fueling on it's own.

[Nashwan]

No? Groovy, might give it a try :)

[hovis]

what about rain/washing the bike, is there is more chance of water getting to the carbs, or not?

[northwind]

Nah... It'd still need to get up the side of the airbox then in through the filter on the carbed bike, and if that's going to happen then raising it 15mm will make no difference :)

[hovis]

then it shall be done :thumbsup:

[r4ce_e3nd]

this what I got:

http://aeltermanwouter.googlepages.com/testbankrun.jpg

green: open MIVV can, tankrisers, foam removed.
red end blue: open MIVV can, tankrisers, foam removed, K&N, dyno-jet, holes in filtercover.


what I want to say with this: 72bhp is not bad for that setup me thinks... it is probably a combination af the can and the tankrisers.

now I have 77bhp (camswap mod and Akrapovic full system) with a rotten chain and sprockets so expect 2-3 bhp more.

[northwind]

Yep, sounds about right... Mine was knocking on 78 with undersized mains and humid conditions. Then add in the dynojet random factor :)

[hovis]

what would be the best size for the raisers to be? i was thinking 15-20mm??

[svrash]

Chewys are 16mm, i think mine are 25mm...i think :?

EDIT: just checked them and thay are about 16mm :oops:

So thats the size i'm going to make my nylon ones :wink:

[chunkytfg]

Then add in the dynojet random factor :)

So it could actually be 135hp or it could be 2hp....you just dont know :lol: :lol:

[northwind]

Nah, I'm pretty sure it's 135bhp.

[hovis]

just got 2 black rubber door stops,they dont look the best,but will do for now.going to go out for a bit then fit them to see if i can tell the diferance

[hovis]

just fitted my 20mm-home-made-door-stop-tank-spacer-raiser-thingys, & i did not notice any differance :cry:

[jambo]

just fitted my 20mm-home-made-door-stop-tank-spacer-raiser-thingys, & i did not notice any differance :cry:

The fact you don't need to change the fueling shows that in itself it makes little or no difference. What it can do is help with everything else.

[hovis]

just fitted my 20mm-home-made-door-stop-tank-spacer-raiser-thingys, & i did not notice any differance :cry:

The fact you don't need to change the fueling shows that in itself it makes little or no difference. What it can do is help with everything else.

i was expecting more noise :oops: perhaps i need to take the deadening pad out aswell???