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honda throttle postion sensor on carb'd bike

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hmmmnz
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PostPosted: 12:02 - 26 Nov 2010    Post subject: honda throttle postion sensor on carb'd bike Reply with quote
hi guys, does any one have any specs, or set up guids,
i can't seem to find anything.
on the suzukis you set get a resistance reading at closed throttle then set open throttle at 76% of that reading on the second set of terminals.

alternitivly does any one have a cbr919 manual,
they were carb'd and had the sensor, may be the manual might shed some light,

just in case the bike is a cb1000 big one 95'

cheers muchly
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Syris the Indomitable
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PostPosted: 14:07 - 26 Nov 2010    Post subject: Reply with quote
Well if no one come up with the goods it will run fine without the throttle position sensor, take it off or tie it back, the ECU will think the sensor is dead and correct for it.
https://img593.imageshack.us/img593/4916/70926833.png
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Bezzer
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PostPosted: 16:49 - 26 Nov 2010    Post subject: Reply with quote
Ichor wrote:
[b]Well if no one come up with the goods it will run fine without the throttle position sensor.


Thumbs Up agreed
If it is anything like the Suzuki one, in particular the Bandit, then you won't notice any difference with it disconnected, people have done back to back runs on a dyno connected and disconnected with no difference whatsoever, it only comes into effect at constant throttle/cruising altering the ignition timing a touch to improve mpg, so unless you're on the motorway a lot you'd never notice the difference in consumption figures. Would think it's the same on the CB, it can't do a lot on a carbed bike.
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hmmmnz
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PostPosted: 18:41 - 26 Nov 2010    Post subject: Reply with quote
i noticed it on the bandit,
made a huge difference in the throttle response,
its working perfectly fine on the cb1000, i am just doing a full service on it, so wanted to check it,
i won't be disconnecting it, that sounds a bit like cutting off my nose despite my face,

i do appreciate the replys though, Thumbs Up
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baldy
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PostPosted: 21:17 - 26 Nov 2010    Post subject: Reply with quote
My old sv650 run really bad and would constantly cut out without it. If you didn't hold the throttle on it would splutter and die.
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Ichy
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PostPosted: 22:21 - 26 Nov 2010    Post subject: Reply with quote
The service manual for the F4 CBR6 suggest that the static resistance should be between 4 & 6 K Ohms. The only thing that it adds is that the resistance should go up and down with throttle movement.
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Bezzer
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PostPosted: 00:05 - 27 Nov 2010    Post subject: Reply with quote
hmmmnz wrote:
i noticed it on the bandit,


Weird that Thinking , didn't notice a bit of difference on my B12 and it's been disconnected for years, know loads that say the same including the bloke who did the checks when he got his dyno'd. Dyno couldn't see any difference which it wouldn't as you don't really do steady throttle/cruising runs on one Very Happy . It shouldn't have any effect on throttle response,
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hmmmnz
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PostPosted: 00:40 - 27 Nov 2010    Post subject: Reply with quote
Bezzer wrote:
hmmmnz wrote:
i noticed it on the bandit,


Weird that Thinking , didn't notice a bit of difference on my B12 and it's been disconnected for years, know loads that say the same including the bloke who did the checks when he got his dyno'd. Dyno couldn't see any difference which it wouldn't as you don't really do steady throttle/cruising runs on one Very Happy . It shouldn't have any effect on throttle response,

why don't you re-connect it and see for yourself if it makes a difference or not, it may not give any hp increase, and i doubt on a dyno you are looking for smooth throttle reaction

it alters the ignition timing according to the revs, so it really should make a difference.


cheers Marki, i'll have a measure and see if i can come up with some sort of equation to work out the best setting
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Ichy
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PostPosted: 00:44 - 27 Nov 2010    Post subject: Reply with quote
FWIW The actual reading don't matter too much, the ECU is detecting the rate of change and adjusting the timing to suit.
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Bezzer
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PostPosted: 16:47 - 27 Nov 2010    Post subject: Reply with quote
hmmmnz wrote:


why don't you re-connect it and see for yourself if it makes a difference or not, it may not give any hp increase, and i doubt on a dyno you are looking for smooth throttle reaction

it alters the ignition timing according to the revs, so it really should make a difference.


No point in connecting it again, been off for over three years now and I did try it on and off a few times before I decided there was no difference, still runs sweet as a nut, no throttle problems.
Loads of others have done it and also can't tell the difference, e.g. https://forum.oldskoolsuzuki.info/cgi-bin/Yabb/YaBB.pl?num=1261499862
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hmmmnz
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PostPosted: 23:23 - 27 Nov 2010    Post subject: Reply with quote
Marki wrote:
FWIW The actual reading don't matter too much, the ECU is detecting the rate of change and adjusting the timing to suit.


it doesnt have an ecu its just a carb'd bike, running a normal cdi,
all the tps does it change the the ignition timing curve,

from what i have managed to find out on the honda system for carb'd bikes is its voltage related rather than resistance of the suzukis


throttle closed it should read between 4.5- 5.5volts
throttle fully open, set to 82.4% of closed voltage

so i'll have to rig up some jumpers so i can measure the voltage while the tps is plugged in, Thumbs Up


thanks everyone for there input, most appreciated Thumbs Up
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