SV Carb Question - SV650.org

23-11-04, 12:45 PM

Just bought a set of carbs from eBay. Stripped them down and found that they had been set up with 132 jets.

I had my old bike on the dyno and on a very hot day found that the best fueling was with 134s (that was before adding air filters, race systems, etc.) and I certainly wouldn't recommend anyone goes below the stock jets of 137.5 but...

The only thing I can think of is that the 132 jets have been drilled out as I have seen this before. Anyone ever heard of a bike being setup with stock 132 jets?

23-11-04, 12:57 PM

The other possibility is that the owner had fitted an aftermarket system that was so restrictive that jets had to go down. Or had nicely blocked air filter.

Sid Squid · 23-11-04, 04:54 PM

I removed the restriction, (legally), on a Yamaha a while back, which, along with an inlet restrictor, had been fitted with strangely small jets. I haven't heard of an SV being so fitted when restricted, but I suppose it's a possibility.

johnnyrod · 24-11-04, 12:44 PM

Different jet manufacturers' jets with the same number on them have different flow characteristics, the number in isolation isn't that useful. Not a real answer, but a caveat.

23-11-04, 12:45 PM	#1
Mike1234 Guest Posts: n/a	SV Carb Question Just bought a set of carbs from eBay. Stripped them down and found that they had been set up with 132 jets. I had my old bike on the dyno and on a very hot day found that the best fueling was with 134s (that was before adding air filters, race systems, etc.) and I certainly wouldn't recommend anyone goes below the stock jets of 137.5 but... The only thing I can think of is that the 132 jets have been drilled out as I have seen this before. Anyone ever heard of a bike being setup with stock 132 jets?

23-11-04, 04:54 PM	#3
Sid Squid No, I don't lend tools. Mega Poster Join Date: Jul 2003 Location: Skunk Works, Nth London Posts: 8,680	I removed the restriction, (legally), on a Yamaha a while back, which, along with an inlet restrictor, had been fitted with strangely small jets. I haven't heard of an SV being so fitted when restricted, but I suppose it's a possibility. __________________ If an SV650 has a flat tyre in the forest and no-one is there to blow it up, how long will it be 'til someone posts that the reg/rec is duff and the world will end unless a CBR unit is fitted? A little bit of knowledge = a dangerous thing. "a deathless anthem of nuclear-strength romantic angst"

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23-11-04, 12:57 PM	#2
chazzyb Guest Posts: n/a	The other possibility is that the owner had fitted an aftermarket system that was so restrictive that jets had to go down. Or had nicely blocked air filter.

24-11-04, 12:44 PM	#4
johnnyrod Member Mega Poster Join Date: Jul 2003 Location: Doncaster, oop norf Posts: 2,122	Different jet manufacturers' jets with the same number on them have different flow characteristics, the number in isolation isn't that useful. Not a real answer, but a caveat.