Tank Spacers?
 

I was looking on e-bay and found a guy selling tank risers to make for more flow to the air box on a naked sv. and i would like to know if that would increase any thing at all.. they are inch spacers that go under the front two bolts on the tank... earlier today i made my own with two nine sixthteens inch nuts... i didn't notice any thing for loss or gain .... your words are apperacted

Re: Tank Spacers?
 

Does your bike need more air? How's it running, what other mods have you got?
I'm not an expert but I'm guessing you'vee have to have the answer to those questions before working out if it's a good idea or not. No point giving it more air if it's jetted the same with a standard exhaust.

Re: Tank Spacers?
 

I run 20mm tank risers but I'm also running BMC race RS filter, micron exhaust, 8" stubby end can, 165 mikuni jets, etc etc etc etc.....

If you raise the tank without jetting up you may end up running lean. The result could be less power and more heat, maybe to the point of some intrenal engine damage. Always jet rich to be safe, twins like it rich too.
If you havn't got any other mods I wouldn't bother.

Re: Tank Spacers?
 

Indeed. Pointless on a standard bike because the filter is the point of most resistance.

Re: Tank Spacers?
 

When people refer to the 'snorkel' on the filter do they mean the lip around the top hole of the filter out of the top of the airbox?

Re: Tank Spacers?
 

I've got a large pdf file. by sv down under. If you post your e-mail and I'll send it over.

This'll explain everyting.

boo

Re: Tank Spacers?
 

no mods so far putting a slip on then a dyno jet kit runnong stock air filter ... the exhaust can is from our speed shop Rossier engineering its for a 450 yfz quad but it'll work, i'm trying to get every edge i can.

Re: Tank Spacers?
 

Errr, OK have fun.

There is no gain to be had from rejetting when you haven't changed the engines airflow. With a stock filter and a slip on pipe the stock jetting is OK.

You want every edge? You racing it?

Re: Tank Spacers?
 

You would be better spending your money on good quality suspension. There is far more improvement to be had in the handling department than you will ever get from the engine on an SV.

Re: Tank Spacers?
 

bikes in UK jetted good from factory?
the ones in USA run like crap with stock jetting :)

Re: Tank Spacers?
 

wouldn't increasing the flow out the exhaust require me to re jet it .... wouldn't it lean it out?

no racing for me, just wanna make the bike at low rpms a little more snappy.

Re: Tank Spacers?
 

can i trade out a whole front set up from a Kawasaki Ninja ZX-636 ?

is there anything else that would fit?

Re: Tank Spacers?
 

What model?

Re: Tank Spacers?
 

year 2000 naked

Re: Tank Spacers?
 

For the vain amongst us removing the snorkel and fitting tank risers does give a nice induction roar......

Re: Tank Spacers?
 

[derail]
I've got a set of Chewy's raisers somewhere, if anyone wants them, give me a shout.
[/derail]

Re: Tank Spacers?
 

He meant which model is the kwak?

Re: Tank Spacers?
 

did you say exhaust of a quad . . . .

exhausts are very specific - try one designed for an SV

Re: Tank Spacers?
 

Not really.
A slip on can type silencer is broadly the same thing. Obviously one meant for a CG125 might be a little restrictive. But, practically all of the cans on sale at the moment are 2" bore, roughly same length. Work exactly the same...

Re: Tank Spacers?
 

. . . if you set it up on a dyno to match with carburation etc

Re: Tank Spacers?
 

With a stock SV, there isn't that much difference in flow from a slip on can to the standard one.

And you try any can on the market, it will be so similar as to be not worth a jetting change against any other.

Re: Tank Spacers?
 

Shout :)

Re: Tank Spacers?
 

No need for a dyno tune ... the jet kit tells you what jet to use and any problems you run into it shows you how to correct it.

Re: Tank Spacers?
 

i was just wondering what would work for my bike ... but thats a whole different thread no worries.

Re: Tank Spacers?
 

Easiest is slingshot stuff, but SRAD isnt much harder and better kit.


Re. jet kits and stuff, there are generally no jetting problems just with a slipon can. So if you want to spend £60 on a jet kit knock yourself out...

Re: Tank Spacers?
 

now that we are completly off topic

Isn't a stock muffler much more restrictive?

Re: Tank Spacers?
 

Not much more than the stock headers.

Re: Tank Spacers?
 

really? all the baffles and such in side the can is more restrictive than a just a pipe? .....

Re: Tank Spacers?
 

well yes - but the backpressure helps midrange torque

to get the bhp i got I had to put in injected cams (its a curvy), then do all the jetting, balancing etc

result 71 BHP and 45 ft/lb torque!!:D:D

then I had to do suspension and brakes to match!!

Re: Tank Spacers?
 

Why dont you just change the rear sprocket?
Top end will be affected slightly but 0-60 will be quicker.

Re: Tank Spacers?
 

I want to be able to hear it... I know thats lame but thats what I want..

Re: Tank Spacers?
 

Then put a different sprocket on and bung some playing cards in the front wheel..:rolleyes:

Re: Tank Spacers?
 

nice but I allready have the can and jet kit wasn't too bad (60$)

How much are sprockets?

Re: Tank Spacers?
 

Jets are about £2.50 IIRC. See why I didn't buy a jet kit...

Re: Tank Spacers?
 

I've got 72 with curvy cams. Only breathing mods and a slight ignition advance. It's cold up North though, that always helps.

Re: Tank Spacers?
 

I dyno'd on a hot day - been meaning to redo it on a colder day to see what the difference is!

Re: Tank Spacers?
 

Aye, it makes a big difference. A normally asperated 4 stroke piston engine loses 1% of power for every 7C rise in inlet temperature. That's the reason I never run a burn crank case breather system. My sv uses a condensing system where the hot oily gas condenses then flows back to the crank case. It vents to atmosphere to prevent pressurisation.

But if your engine / crank case is breathing oily gas at 100C + into the air box your on a fast train to power loss.

It was about 15C when I dynoed mine. But it wasn't too humid, only about 30% humidity. As this also makes a big difference. Basicaly the more water in the atmos the less room there is for o2.

Re: Tank Spacers?
 

Consisting of what? Is this just a set of filters on the crankcase breather hoses or something a little more fancy with a catch tank etc?

Re: Tank Spacers?
 

It's the standard catch tank but where it normally breaths into the airbox it's blanked off and it has a small breathing hole drilled in facing the airbox. As it's filled with baffle it condenses and runs back down. I've never had 1 drop leak out of it.
It works great, no hot air into the airbox and the crank case can still breath no probs. No leaks, it's all good.

Re: Tank Spacers?
 

Can I be a pain and ask for some pictures of this?