R1150RS and TPS setting with GS-911

[Wraithwrider]

Hello all.

I recently had to lower my idle while away by tweaking the air bypass screws so I've just gone through setting up the throttle bodies at idle and 3,000 rpm.

Because I have a GS-911 that I bought for working on my 1200RS I decided to check the TPS setting. The bike has seen an easy life and I've done nearly 2,000 of its 18,000 miles. I don't know if the idle stops have been adjusted but there is no blue paint thereon. I'm aware that they should be left well alone.

I haven't taken any voltage readings at the TPS yet.

On the GS-911 test screen the TPS had an out of spec at a reading of 31. It should be 16-20 (from memory). I adjusted it to 20 and it is now displayed in the blue 'in spec' sector as opposed to red. The TPS % at throttle closed was high before resetting, it's now 0.6%

My issue is that the TPS position is shown as 81.6% at wide open throttle. I guess it should be 100%.

Any thoughts on this and the way ahead?

Advice much appreciated.

The bike runs very well. I see it as a little slow but that's compared to the 1200. It does have a Gemi chip fitted.

Peter

 

[Wraithwrider]

I double checked my readings. It’s not % that’s displayed from the GS-911 but degrees of rotation. Does anyone have a feel for if 81.6 is correct?

 

[DrFarkoff]

Just use a digital Multimeter

The rear wire at the TPS is the positive and you ground it to a GOOD clean ground

With the meter on 20v DC?

You want to see zero point 38 ish volts 0.38 (0.37 ~ 0.39 volt will work)

 

[Wraithwrider]

It’s odd. I tried to insert some wire strands into the connector and with the ignition on I got no readings on the meter.
So I checked the terminals on the detached cable and nothing from 1 to 4. I was expecting 5v.
The TPS calibrated fine on the GS-911. A YouTube video showed throttle position displayed in % and that threw me when mine maxed out at 81.6. Then I realised it was degrees. A change less than useful.
Thinking the bike had a serious issue I took it out for a run, to a bike night if it was good.
It is running very well indeed. In 6th gear north from Lancaster uphill on the M6 it was really strong accelerating from 70 upwards and surprising me.
So I’m confused. No voltage readings (I checked the meter with a 9v battery) but calibrating and displaying position from the GS-911 and running really well. I’ll check again with the GS-911 and have a look for my other meter.

 

[Wraithwrider]

An update. I managed to get readings off a pair of ball end needles inserted from underneath. 0.44v. Adjusted to 0.36. Checked with GS-911. Still in spec.

Still not getting any voltage 1 to 4 disconnected.

Run tomorrow.

 

[theoneandonly]

i have a friend like you ,
he will fiddle with his bike .....


'til he breaks something .

 

[Wraithwrider]

That’ll be why I’ve been maintaining my bikes successfully for nearly 56 years

 

[DrFarkoff]

An update. I managed to get readings off a pair of ball end needles inserted from underneath. 0.44v. Adjusted to 0.36. Checked with GS-911. Still in spec.

Still not getting any voltage 1 to 4 disconnected.

Run tomorrow.

1) Lift that 0.36 to 0.38 even 0.4 is "okay"!

Whilst it is miniscule You are on the lean side of idle settings which everything builds from in the table

2) stop messing with it before you break something !

Its obviously running "OKay"( ??? ) So it must be getting the signals it wants !

 

[Wraithwrider]

The bike is new to me. It runs well and has been looked after. I am a retired engineer (not technician or mechanic although I’ve been both). I’m making sure that everything is as it should be.
It seems a little sluggish although I ride a 1200RS that goes particularly well alongside it.
I’ve done all the usual maintenance and servicing, fitted the upgraded cam chain tensioner, Clearwater Darlas and twin horns. Having the GS-911 for the 1200 means that I can check the TPS setting easily. The voltage check has confirmed that. I’m not sure why I can’t get the 5v to show up on those pins but hey ho.
Riding the bike on Thursday showed real positives from resetting it. That and a careful throttle body balance (that I’ve done before).
Less vibration and most definitely better performance.
I love the 1150. I’ve owned the 1200 from new, over 8 1/2 years and 45,000 miles. The 1150 is different and in some ways better. It’s a very enjoyable bike to ride, and maintain.
I’m off for a full day in the Dales today with some bikes 20 years younger. We’ll see how it goes

 

[DrFarkoff]

GS intake tubes help with low down Grunt

 

[Steptoe]

That’ll be why I’ve been maintaining my bikes successfully for nearly 56 years

Then you must have learnt “if it ain't broke, don't fix it “

 

[Wraithwrider]

It depends I guess if you know if it’s ‘broke’ or not.
Just done 110 miles in the Dales. Glorious scenery and nadgery roads.
I didn’t quite know what to expect of an 1150. I’ve owned an R100RS, R1100RS, R1200GS first iteration, and my R1200RS LC.
I found the 1150 a bit ‘flat’. It isn’t now

A good day