Rejetting and such

[yorkie_chris]

Its only a week or so until I'm going to pull the SV apart and play with a few things.

Going to be a micron full system, fuel can cut down to 3/4 length, degutted air filter, raised tank 10mm

Based on info here:
http://www.geocities.com/catpoopman/sv650_rejet.html

And buying jets here:
http://www.allensperformance.co.uk/mikjets.html

Got some 152.5 mains, going to stick with the 17.5 pilots and raise the needle with 2 washers.
I have heard of some people talking of 160 and bigger mains, but I presume they are different jets using bigger numbers than the mikuni ones?

I was impressed with allens performance's service, delivery was very quick and prices affordable

[northwind]

You shouldn't need the shims, euro SVs have stepped needles like a dynojet kit so you can raise and lower them. Mine have a wee thin half-step shim in anyway but for basic adjustment you don't need it, just move the jesus clip.

Mine has 185s in it now, but that's with a pretty decent full system and the wide-open BMC race filter. With the desnorkelled stock filter it runs pretty rich. I can't think in Mikuni sizes at all but that seems like the right ballpark. If you need different ones, I should still have a wee selection box of jets somewhere with everything from DJ 150 to 175, which should cover you.

Were you planning to drill the carb slides? I saw Rob Numbers saying it wasn't a good idea a wee while back, which was news to me but was interesting, might be worth looking into that if you are... I did it myself but I can't claim it was an informed decision

[yorkie_chris]

Possibly, can't see that the slider oscillation people talk about is harmful, or avoidable in some degree.
Seems like a good idea so long as the hole isn't 1/4" or something daft, as then you'd get the stumbling problems that simple slide carbs have when you whack the throttle open.

[northwind]

Haven't a clue myself I've got a set of undrilled slides which I might try out next year, that post got me interested. I'd fit them today when I do the carb heaters but there's really no point with the weather like this, can't test things properly.

[yorkie_chris]

Also what sort of dyno to use?

I don't trust any of them due to the amount of information flying around, dynojet seems to read massively high, most of the braked ones add 30%, just for the sake of it, EC997's manufacturers think they're ace.

What I need is something thats going to read the same as what VOSA would use if I got pulled with regards 33bhp limit, so I can set it up for that.
I'm thinking I need a dyno thats going to put out true bhp accurately without putting 300 fudge factors into the mix just for the sake of fondling some power rangers bolloks.

Yorkie are you still restricted to 33bhp?

[yorkie_chris]

Aye

[northwind]

Originally Posted by yorkie_chris

Also what sort of dyno to use?

I don't trust any of them due to the amount of information flying around, dynojet seems to read massively high, most of the braked ones add 30%, just for the sake of it, EC997's manufacturers think they're ace.

What I need is something thats going to read the same as what VOSA would use if I got pulled with regards 33bhp limit, so I can set it up for that.
I'm thinking I need a dyno thats going to put out true bhp accurately without putting 300 fudge factors into the mix just for the sake of fondling some power rangers bolloks.

Hmm. Haven't the slightest on that one. I go by the quality of the shop/operator rather than the machine, I'd sooner use YPE's DJ200 than most other shops, even if they had better hardware, since I know they can use it and they couldn't care less if I don't like the numbers. But your position's a bit awkward. TBH if I was you I'd stick with the filter as standard and just tweak the jetting to suit the system, but that's boring.

Originally Posted by Razor

Yorkie are you still restricted to 33bhp?

Originally Posted by yorkie_chris

Aye

So you're going to knowingly break the law?

[yorkie_chris]

No, I'm going to set the bike up to make near on 33bhp, as I mentioned earlier, with use of a throttle stop. More torque than stock and some nice induction sound too.

Please don't point me to FI international website saying I need a certificate and have to give them all my money unless you can find a law saying I have to. (I get that from everyone whos read their website, they have a vested interest)

Edit: for the record, if I was going to knowingly break the law I wouldn't be daft enough to put it up on a public forum