[jstehman]

I have a spare set, but you'd have to rip it from my dead arms to get it.

This is how I am with my Honda V4 carbs

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[jstehman]

First round of carb dip and ultrasonic cleaning. Look pretty good

I will probably do one more round of soak and sonic. Float seats and needles should be here soon, then on to reassembly and setting TPS.

Struggling with disconnectimg the switch from the bike harness,.so gonna hit that with contact cleaner and wiggle some more

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[Geo Smith]

Looking good bud. I love pulling stuff from the ultrasonic cleaner. Instant gratification. But be sure to still blow out every port, nook and cranny. Dips and ultrasonics do a good job. But you still have to go through the painstaking job of hitting all the ports with blasts of carb cleaner, and then blasting though with compressed air. Search SVR for ziptech's methods. It saved me. Cheers.

 

[jstehman]

Carbs almost ready to pop back on the bike.

Diaphragms and caps installed, as well as coasting valves.

Rough carb sync with strip of copy paper as a feeler

Waiting for float needles and seats to arrive, then I can button them up, set the pilots and hook up new fuel lines, Set TPS.

We will be running from a temporary tank, the bikes tank needs flushed and cleaning.

Hope everyone is having a nice Holiday!

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[Straticus]

There is no TPS on the Gen 1 Carb versions. Some like mine do have Carb heaters

 

[jstehman]

Looks like it basically adjusts ignition timing based on throttle position

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[Geo Smith]

That's that thingy with wires going to it that everyone said don't fuck with. So I didn't.

 

[jstehman]

I removed the sensor from the carburetor before I ultrasonicced it.

Looks easy enough to adjust. Found a good video on YT Thanks Matt

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[Michael Graziosi]

I believe the U.S. models have a TPS and the European models have the carb heater.

 

[MattTriesToDoThings]

I removed the sensor from the carburetor before I ultrasonicced it.

Looks easy enough to adjust. Found a good video on YT Thanks Matt

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I swear to god it doesn't do anything. I've been reading about that unit for years (it's the same part on a GSF600 MK2 Bandit). There are a few people that claim adjusting it is some miracle cure that fixed their bike. A lot of the old guard on those boards with decades of experience with those bikes say it does absolutely nothing. I lean towards nothing--but I never just unplugged it after riding it to see if I could feel the difference. It's easily accessible on that bike from the right side.

I was thinking about the TPS on the SV the other day. When you see people installing Keihin flat slide carburetors on race bikes, are they bothering with the TPS? Or just ignoring whatever function it's providing? A google search shows this topic was discussed here 10 years ago with similar vague feedback: Keihin FRC 41mm Flat slide Carburetors

 

[MattTriesToDoThings]

That's that thingy with wires going to it that everyone said don't fuck with. So I didn't.

The thing is that you likely did fuck with it if you touched it at all when cleaning your carburetors. If you did any type of dunking in cleaner (not just blowing carb cleaner/compressed air through passages), you likely uninstalled the electrical component. It bolts to the carburetor through two eccentric bores. The pivot alignment of how you put those two small bolts back on that hold it in place will affect voltage read at the closed and WOT positions. It's a very small positional adjustment that wasn't obvious to me the first few times I was looking at it.

 

[Straticus]

I can't see what a TPS would do on the CV carbs and what it could electronically/physically control ?

As FI systems use sensors and electronics to control fuel flow I can understand that but on cruder and more mechanical Carbs I struggle to see how a TPS could work:/

Also,

Curvy Carb Throttle Position Sensor question. - SV650.org - SV650 & Gladius 650 Forum

Curvy Carb Throttle Position Sensor question. SV Talk, Tuning & Tweaking

forums.sv650.org

 

[Geo Smith]

If you did any type of dunking in cleaner

No dunking, just blasts of carb cleaner and compressed air. But it seem the consensus is the thingy has no function. Next carb cleaning I'll remove it and use the ultrasonic cleaner.

 

[jstehman]

I can't see what a TPS would do on the CV carbs and what it could electronically/physically control ?

As FI systems use sensors and electronics to control fuel flow I can understand that but on cruder and more mechanical Carbs I struggle to see how a TPS could work:/

Also,

Curvy Carb Throttle Position Sensor question. - SV650.org - SV650 & Gladius 650 Forum

Curvy Carb Throttle Position Sensor question. SV Talk, Tuning & Tweaking

forums.sv650.org

Honda magna 3rd gen had it too. I can't see it doing much except altering ignition timing between closed throttle and full open shown by the manual. Probably emissions and a slight increase in throttle crispness because the ecu /ignition module should control spark mostly.

Wish we could have explanation from engineers

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[Geo Smith]

Wish we could have explanation from engineers

Skywalker call your office.

 

[Skywalker67]

Geo, unfortunately I'm no expert on combustion engines.

 

[Nick's-SV]

on my yamaha, twin carbed it can advance the timing when starting and cause the engine to kick back and damage the starter clutch. so never touch throttle when starting.

 

[jstehman]

Parts are here!

I need to install and set the float height.

I've seen the instructions in the service manual, but the picture is less than helpful, as usual lol.

It looks like the measurement is taken from the bowl mating surface to the "heel"? of the float closest to the needle valve/float pin/hinge.

With the carb tilted so the float tang is just touching the needle spring loaded damper And the needle is fully seated. Sound correct?

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[Straticus]

The float height is taken from the furthest point from the axle/float needle valve from the top of the float to the carb flange. This is a picture from one of my old Honda CV carbs but the principle is the same.

In this picture the needle valve is on the left

 

[jstehman]

So I am measuring from the flat bottom of the float and not the corner like Suzukis picture shows

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