SV650.org - SV650 & Gladius 650 Forum - View Single Post

northwind · 01-02-05, 04:53 PM

I'm not sure about how the desnorkel works out as compared to other filters, but I suspect that 152.5 DJs is a good size. It'll certainly be better than stock... You'll need to adjust the idle screws and if it's a US bike, use shims to adjust the needle height as well.

"Suzuki" jets will be Mikuni I suspect, since they build the carbs for the SV IIRC. Mikuni use a different measuring system based on flow instead of size (or size instead of flow) which usually means their jets are around 5-10 sizes bigger than the DJs that most people use. (my Mik 140s are roughly equivalent to 146/148 s far as I can tell)

I'm just at the end of much the same process as you, and I'd recommend you get it to a dyno for fine-tuning anyway... You can probably get it 4/5, 9/10 of the way there by butt dyno but if you're paying out for a full exhaust I don't see the point in trying to economise on setting it up. Plus lean running doesn't just leave you running badly, it can damage your engine over time.

So what I'm doing is getting it as close as I can to cut down on dyno time, then I'll take it in for finishing. For the record, I'm running a BMC Race RS filter (best flowing standard-type filter for the SV), Chewy's tank spacers, full WRP race system (well, usually I am) and a DJ kit... 2 3/4 turns on the idle screws, 3rd clip on the DJ needle (if you're using stock US bike parts, you'll need to use wee shims instead) and 160 mains. Still a little lean at WOT and a bit lumpy at idle though

01-02-05, 04:53 PM	#6
northwind Moderator Mega Poster Join Date: Jan 2004 Location: In the garage where I belong Posts: 17,083	I'm not sure about how the desnorkel works out as compared to other filters, but I suspect that 152.5 DJs is a good size. It'll certainly be better than stock... You'll need to adjust the idle screws and if it's a US bike, use shims to adjust the needle height as well. "Suzuki" jets will be Mikuni I suspect, since they build the carbs for the SV IIRC. Mikuni use a different measuring system based on flow instead of size (or size instead of flow) which usually means their jets are around 5-10 sizes bigger than the DJs that most people use. (my Mik 140s are roughly equivalent to 146/148 s far as I can tell) I'm just at the end of much the same process as you, and I'd recommend you get it to a dyno for fine-tuning anyway... You can probably get it 4/5, 9/10 of the way there by butt dyno but if you're paying out for a full exhaust I don't see the point in trying to economise on setting it up. Plus lean running doesn't just leave you running badly, it can damage your engine over time. So what I'm doing is getting it as close as I can to cut down on dyno time, then I'll take it in for finishing. For the record, I'm running a BMC Race RS filter (best flowing standard-type filter for the SV), Chewy's tank spacers, full WRP race system (well, usually I am) and a DJ kit... 2 3/4 turns on the idle screws, 3rd clip on the DJ needle (if you're using stock US bike parts, you'll need to use wee shims instead) and 160 mains. Still a little lean at WOT and a bit lumpy at idle though __________________ "We are the angry mob, we read the papers every day We like what we like, we hate what we hate But we're oh so easily swayed"