i know after 2000 the jets changed and they also brought in TPS sensor and such but i was wondering since our carbs on the older bikes are well basic has anyone took say a 2004 carb from the gs500 and used it on a pre 2000 but left the TPS out and just changed the jets.
see my thought is with having 3 jets on the 2000 models then it made it easier to fine tune when it come to carbs and such
Quote from: chopperwoo on January 06, 2018, 02:53:17 PM
i know after 2000 the jets changed and they also brought in TPS sensor and such but i was wondering since our carbs on the older bikes are well basic has anyone took say a 2004 carb from the gs500 and used it on a pre 2000 but left the TPS out and just changed the jets.
see my thought is with having 3 jets on the 2000 models then it made it easier to fine tune when it come to carbs and such
I have 3 jet 01-02 carbs on a 1995. And no not worth it, not easier tuning and in fact I think its a big backwards step.
Cos size 20 pilots clog a lot easier than size 40.
Cool.
Buddha.
How does the TPS sensor work.
the throttle position sensor on later gs500 is mounted on the butterfly valve spindle and the ecu or cdi unit as typically known on a motorcycle sends signals when to open thus controlling the fuel to air mixture. don't quote me a 100% as im more used to the keep it simple method of things but the way the things are with the suzuki gs500 and how they are moving forward it won't be long before they become fuel injected
Quote from: chopperwoo on January 07, 2018, 02:23:17 AM
the throttle position sensor on later gs500 is mounted on the butterfly valve spindle and the ecu or cdi unit as typically known on a motorcycle sends signals when to open thus controlling the fuel to air mixture. don't quote me a 100% as im more used to the keep it simple method of things but the way the things are with the suzuki gs500 and how they are moving forward it won't be long before they become fuel injected
OK thanks but I still don't get what it does. OK so it senses the position, it doesn't move the spindle, does it cause the CDI to send a larger charge to the ignition coil? The butterfly spindle itself is controlled with the throttle cable linkage is it not??
Quote from: chopperwoo on January 07, 2018, 02:23:17 AM
the throttle position sensor on later gs500 is mounted on the butterfly valve spindle and the ecu or cdi unit as typically known on a motorcycle sends signals when to open thus controlling the fuel to air mixture. don't quote me a 100% as im more used to the keep it simple method of things but the way the things are with the suzuki gs500 and how they are moving forward it won't be long before they become fuel injected
CDIs aren't just ECUs for motorbikes. Whereas ECUs are 'engine control units', which regulate and monitor everything engine from the air-fuel mix to the timing to the wear on the cam-chain, CDIs are 'capacitor discharge ignition' units. They exist purely to control ignition timing. Modern fuel-injected motorbikes do use ECUs rather than CDIs.
The GS500 has used a CDI since its incarnation, and no GS500 or GS500F has ever come fuel-injected from the factory. The newer models have some additional electricals to pass emissions tests, but are still mechanically carbureted, just as they always have been. Unfortunately, the GS500 has also been discontinued, so we will never see it upgraded to EFI.
Edit: As for the original question, if you want to know if the TPS (or any of the other attached stuff with wires and hoses hanging off) is needed for the new carbs to work, the answer is no. On newer bikes, the TPS may be used to inform ignition timing in the newer-model CDI and to control some of the emissions equipment on the newer carbs like those white bits on the top. The carbs themselves don't rely on anything electrical to actually work, whatsoever, and you could certainly make it work without all of the bits it has hanging off it on the newer bike without too much trouble.