Kiwi_Roy 406 Posted May 14, 2019 Report Share Posted May 14, 2019 8 hours ago, rich888 said: Re hall effect TPS. You'd have to be really really sure it was impervious to stray magnetic effects. Imagine if it read full scale suddenly... Not a lot would happen, it might effect the mixture a tiny bit, it doesn't change the amount of air. 1 Quote Link to post Share on other sites
rich888 28 Posted May 14, 2019 Report Share Posted May 14, 2019 5 hours ago, Kiwi_Roy said: Not a lot would happen, it might effect the mixture a tiny bit, it doesn't change the amount of air. Yes, your right, just leaning out or richening. Quote Link to post Share on other sites
docc 3,395 Posted May 14, 2019 Report Share Posted May 14, 2019 Looks like we've mixed a couple topics: "Cheaper source for TPS" and "Alternatives for the potentiometer based TPS." I have no way to separate these posts anymore, so let's all be aware there is more than one discussion going on in this thread. It's kinda like being at a party where the conversations and music sorta blend . . . 1 Quote Link to post Share on other sites
docc 3,395 Posted May 15, 2019 Report Share Posted May 15, 2019 On 5/8/2019 at 4:25 AM, czakky said: Looking forward to hear your thoughts... Looks like the CaCycleWorks PF3C is a good source, at least in The States. Probably half the price of a Moto Guzzi Part. And it seems the Harley-D part is No Longer Applicable (?) I'd like to say I can feel the difference between the PF3C and the PF4C, but that would be like trying out a new tire and declaring it "so much better" than the old tires. For me, that is likely only because the old tires were clapped out and any new tires would be a fabulous improvement. So, the stability of transitioning from closed throttle, as in coming out of a corner or maneuvering at parking, is resolved. The >hoogedie< jerking and jumping at slight throttle openings is also gone. My 49,000 mile TPS had just aged out, that's all. From my notes, it seems these potentiometer-based TPS might expire at 50-60,000 miles (80-100.000 km). I'll be checking mine at every tune-up now. So easy once the DVOM is hooked up, especially with a breakout harness. Again, I have never been able to see the glitches with millivolts, but Ohms give it away. 1 Quote Link to post Share on other sites
gstallons 705 Posted May 15, 2019 Report Share Posted May 15, 2019 I don't " think " you will see a glitch … Well , we used to test TPS sensors on vehicles and used the voltage scale to find faults with them . Quote Link to post Share on other sites
docc 3,395 Posted May 15, 2019 Report Share Posted May 15, 2019 Both my failed TPS exhibited jumping (up and down) in the resistance (2000 Ohm range) with my Triplett DVOM. It was not apparent on the millivolt scale. This is testing the resistance through the TPS (potentiometer) slowly opening and closing it while reading the resistance. Normally, the TPS reads over one Ohm and scales through the tenths and hundredths, as I recall. My bad TPS would jump up and down at several points and even went "open" at a certain angle of opening. The Sport was getting hard to ride. 1 Quote Link to post Share on other sites
rich888 28 Posted May 15, 2019 Report Share Posted May 15, 2019 Best way to find drop outs is with a digital scope. Needn't be expensive. Hantek 20mhz scope to put on a laptop is £60 here in UK. There are even cheaper scope kits. You'll see a nice plot of the TPS voltage and the knee point. Quote Link to post Share on other sites
luhbo 236 Posted May 23, 2019 Report Share Posted May 23, 2019 there are options ... https://www.alibaba.com/product-detail/THROTTLE-POSITION-SENSOR-PF3C_60819128336.html?spm=a2700.7724838.2017115.10.1e1e1e71BheaUi 2 Quote Link to post Share on other sites
antmanbee 69 Posted May 23, 2019 Report Share Posted May 23, 2019 I'd take 4 or 5 if someone is going to order. Quote Link to post Share on other sites
docc 3,395 Posted May 23, 2019 Report Share Posted May 23, 2019 5 hours ago, luhbo said: there are options ... https://www.alibaba.com/product-detail/THROTTLE-POSITION-SENSOR-PF3C_60819128336.html?spm=a2700.7724838.2017115.10.1e1e1e71BheaUi 1 hour ago, antmanbee said: I'd take 4 or 5 if someone is going to order. That is the same TPS I got from CA Cycle Works shipped for $~92US. Anyone want to submit a price request to Alibaba? Quote Link to post Share on other sites
sp838 135 Posted May 24, 2019 Report Share Posted May 24, 2019 I would take a couple too. I'm guessing if we did the minimum order of 50, they'd be $5 each, plus whatever extra the shipping is. Which I'm guessing would be not much, the Chinese govt. subsidizes their shipping costs. Quote Link to post Share on other sites
docc 3,395 Posted May 24, 2019 Report Share Posted May 24, 2019 3 minutes ago, sp838 said: I would take a couple too. I'm guessing if we did the minimum order of 50, they'd be $5 each, plus whatever extra the shipping is. Which I'm guessing would be not much, the Chinese govt. subsidizes their shipping costs. I know it "says" $1.00-$5.00, but there is a current price request to be entered . . . someone ought to do that to get their current actual pricing. Quote Link to post Share on other sites
antmanbee 69 Posted May 24, 2019 Report Share Posted May 24, 2019 https://www.alibaba.com/product-detail/ckp-cmp-sensor-diesel-engine-camshaft_62091864088.html?spm=a2700.7724838.2017115.13.6f677b1dEeDJKN Maybe throw in an order of these too. 1 Quote Link to post Share on other sites
MartyNZ 414 Posted May 24, 2019 Report Share Posted May 24, 2019 11 hours ago, docc said: Anyone want to submit a price request to Alibaba? I asked the question of Alibaba; price for 50, plus price to ship to NZ. I will report back. 1 Quote Link to post Share on other sites
luhbo 236 Posted May 24, 2019 Report Share Posted May 24, 2019 These parts are that cheap. Once they were "proudly made in USA" by CTS, a competitor of where I go daily. I think some years ago I already did post a link to their site. They sold it as a product meant for "leisure articles" like lawn mowers and the like. 80.000 miles on a big V-Twin definitely is beyond its designed life time. 1 Quote Link to post Share on other sites
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