Brendan W
Registered user
Be kind guys, first time fuel injected bike and I genuinely don't know what I am doing.
97 1100R had a bit of surge below 3000 rpm.
Put the Carbtune on and got nowhere. The BBS and cable adjustments seemed to have no effect or go the wrong way. The idle was at 1300 ish and the BBS were close to fully in.
Looks like the throttle stops and TPS were moved in the past, no sign of paint on anything, in fact the TPS screws seem brand new
Took the DVM to it and and found I had 175mV set point but 220mv as zero. Clearly can't be right so I'm discounting the 175 as a glitch. Left the TPS well alone at 220mV zero and I then set 360mv with the stop screw.
For the first time I can balance to within 1 cm Hg and the BBS actually do work as you would expect. Idle is rock steady at 1100 rpm and the surging is gone.
However there is a slight hesitation at low rpm which feels like lean and my gut says the BBS are too far in.
So my question. Am I right(ish) in thinking that at 220mV zero, my 360mV set could result in the plate being more open than the Motronic expects and I should go for a 250mV zero and 370mv set point giving a differential of 120 instead of 140. Then hopefully with the plate less open the BBS will come back out and I get a slightly richer mix at low throttle?
97 1100R had a bit of surge below 3000 rpm.
Put the Carbtune on and got nowhere. The BBS and cable adjustments seemed to have no effect or go the wrong way. The idle was at 1300 ish and the BBS were close to fully in.
Looks like the throttle stops and TPS were moved in the past, no sign of paint on anything, in fact the TPS screws seem brand new
Took the DVM to it and and found I had 175mV set point but 220mv as zero. Clearly can't be right so I'm discounting the 175 as a glitch. Left the TPS well alone at 220mV zero and I then set 360mv with the stop screw.
For the first time I can balance to within 1 cm Hg and the BBS actually do work as you would expect. Idle is rock steady at 1100 rpm and the surging is gone.
However there is a slight hesitation at low rpm which feels like lean and my gut says the BBS are too far in.
So my question. Am I right(ish) in thinking that at 220mV zero, my 360mV set could result in the plate being more open than the Motronic expects and I should go for a 250mV zero and 370mv set point giving a differential of 120 instead of 140. Then hopefully with the plate less open the BBS will come back out and I get a slightly richer mix at low throttle?
