Ordered a set of 2008 carbs and got sent a set of earlier model carbs with twin main jets but no TPS nor vacuum solenoid. Will the carb run ok without the TPS being connected to the ECU or do I have to bodgie up an emulator. Need to know quick before I contact seller and return them. If it works fine I will kewep them.
Don't know the ins and outs of the TPS and all that, but I do know that the carbs used different boot sets to connect to the engine and airbox, so without the correct boots the carb won't even fit.
Supposedly the 3-jet carb is a much better arrangement, so it would behoove you to return the 2-jet and get the proper 3-jet.
Either way the seller didn't deliver what was promised. False advertising and all that.
i got 2005 engine running 1992 carbs. no probs.
cheers,
Lauri
This is a 3jet but without the TPS and vacuum solenoid so between 2001 and 2003. That's why I considered keeping them.
Sahtinurk, Thank for that mate. Any problems at all? My worry is they may have matched some ignition tricks to rpm/throttle opening.
I have contacted the seller and he is sending the correct ones. It would be interesting to know for future reference though, especially if I go to aftermarket carbs I can tune properly. I hate tuning CV's.
I haven't had any problems using the old carbs. Idles and revs up nicely, all i have read and it was also mentioned on this forum
is that the newer ones are a bit smoother when set up correctly.
Cheers
Lauri
I am running a 95 with 02 carbs. I think you should be fine, just find what hoses go where on the carb, and in the harness what needs to be plugged or removed etc and you would do fine.
Cool.
Buddha.
Yeah Buddah, I figured it would work the other way around OK. My worry was the fact that the TPS has to do something or it would be there. As it can't really effect the direct fuel load like it does on a EFI, I suspect it affects the ignition timing( as well as the vacuum solenoid). If it does it may need some sort of emulation to allow optimium spark curve. Eg. if it is used to detect closed throttle it may retard the ignition and allow the solenoid to allow air into the top. So if you left the TPS attached but disconnected from the carb it wouldn't allow full advance nor slide rise. ( thought experiment only. I am not saying that is whai it does).
I know you have to match the TPS resistance correctly if it attached, so more than reasonable the ecu is looking for a load to work correctly.
I don't think this bike has any of them fancy electronics crap. Even in 04 its still not EFI.
Cool.
Buddha.
Ok I have found the later TPS does infact affect the spark advance ( beside affecting the solenoid). The ecu equipped ones use a 3d map for advance using the TPS and rpm. It defaults to a 2d map if the TPS is removed , so will work fine, but not as smooth from low rpm under load. Be willing to bet there are some performance limiting tricks in there though ( like the SV650 5000rpm retard trick)
The correct carbs arrived today and I have blocked the solenoid vacuum valves ( only affect overrun) but the TPS is back on.
Back to fixing the fuel dribble problem even with the shutoff valve in the fuel pump...Back to a vacuum switch on the tap.