Posts
379
Joined
3/28/2019
Location
Laotto, IN
US
duckdog77
4/5/2019 4:08am
4/5/2019 4:08am
Edited Date/Time
4/5/2019 5:56pm
I have a 2011 KX250F that has what I believe to be a TPS issue. I’ve tried moving it in small increments (as I’ve read forum after forum on how to measure the resistance but still a little confused on it) I can get it to run smooth but with a super low idle. Or I can get the idle where I like it but then I get a popping backfire issue. And irratic throttle response. I believe the tps is bad.
Is there an easy way to hook up power to the bike to be able to get a volt meter on the bike without cutting a bunch of wires?
I have a new tps coming a little premature as I haven’t exactly identified that it’s bad but have 7 days to get the bike running how I need it for the first race of the season and don’t want to not have it if it is the culprit.
Is there an easy way to hook up power to the bike to be able to get a volt meter on the bike without cutting a bunch of wires?
I have a new tps coming a little premature as I haven’t exactly identified that it’s bad but have 7 days to get the bike running how I need it for the first race of the season and don’t want to not have it if it is the culprit.
Your idle RPM should be 1800ish( dont remember off the top of my head what the 250s are).
You dont need to cut wires to measure the voltage. The connector for the TPS is on the right side of your bike between the throttle body and exhaust. You simply unplug it, and connect wires as shown in the service manual. Kawi provides a very detailed diagram for this. Essentially what youre doing is completing the circuit with your multimeter spliced in using your wires.
Adjust your TPS to .6-.62v at idle.
Heres a little diagram that explains what youre doing with your wires. The kawi manual has much more details and pics than this though.
I was looking for the other end of the pig tail last night and could not locate it. I will try again this evening. Can you do this with the bike not running?
Agreed I need a service manual as I work on this thing more than I ride it!
I have a spare vattery laying around. Where would I hook it up to get power to the bike?
The Shop
Do you think this could be done with a Power Probe w/out the bike running?
Paint cars for a living and some of the techs here have them so I have access to one.
My wires do not go to another 3 prong harness. They split and red/yellow yellow/green go to a 4 prong and gray hooks up with a couple other grounds I’m assuming. So far un able to get any voltage readings. From following service manual instructions. I’m assuming evening if the tps is bad I’d still get some sort of reading.
Here’s a pic of my wiring diagram.
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