kewwig
8th August 2010, 20:22
I have a GSF1250 Bandit that has always had issues with lean running at slow speeds around town. Nothing major but enough to annoy and cause jerky overrun etc. Full tune up and throttle body sync etc made it slightly better, but it's always been an annoyance on what is otherwise a great bike. Some do it, some don't and no one can really explain why.
It was doing this both in standard trim and with a Yoshi TRS, BMC filter and a GiPro ATRE fitted. (Of course this leans things out even more, although the EFI adjusts). I had some success by removing the oxygen sensor connector and replacing it with an eliminator plug, which essentially replaces the sensor with a resistor and richens things up a little.
I had been doing some research which indicates lean running on the bandits can be an issue, due to Euro 3 emission requirements. Manufacturers are tuning lean to reduce emissions. I bit the bullet and bought Dale Walker's (Holeshot USA) Stage 1 kit (TFI box, sensor eliminator etc). It's a piggyback system changing the signals from the ECU and well rated by owners in the USA. Coupled with the pipe, filter and ATRE, plus a minor airbox mod (snorkel removed and a hole cut in the airbox lid) all I can say is wow! Power everywhere, MUCH smoother right through the rev range with about an extra 10HP and around 9 extra foot-pounds of torque. I also blocked the PAIR line, which eliminated all of the popping and farting from the Yoshi on the overrun. I haven't dyno'd it, but you can really feel the difference in pull.
The Bandits don't make a lot of peak power, but the torque is huge and kicks in down low. This has added to it in a big way, giving instant extra roll on power in top, and it's smooth right down to walking pace now. I don't normally rave about products, but this has transformed the bike and I thought it was worth sharing with other 1250 owners out there. If you have a Bandit 1250 running lean, or have issues with the new GSX1250FA, this is worth doing. The kit is easy to fit. Dale is very helpful (and no, I don't work for him) and sure knows his way around Bandits of all flavours. If anyone was looking at his site and not sure if the hype was true (as I was), it's worth it.
It was doing this both in standard trim and with a Yoshi TRS, BMC filter and a GiPro ATRE fitted. (Of course this leans things out even more, although the EFI adjusts). I had some success by removing the oxygen sensor connector and replacing it with an eliminator plug, which essentially replaces the sensor with a resistor and richens things up a little.
I had been doing some research which indicates lean running on the bandits can be an issue, due to Euro 3 emission requirements. Manufacturers are tuning lean to reduce emissions. I bit the bullet and bought Dale Walker's (Holeshot USA) Stage 1 kit (TFI box, sensor eliminator etc). It's a piggyback system changing the signals from the ECU and well rated by owners in the USA. Coupled with the pipe, filter and ATRE, plus a minor airbox mod (snorkel removed and a hole cut in the airbox lid) all I can say is wow! Power everywhere, MUCH smoother right through the rev range with about an extra 10HP and around 9 extra foot-pounds of torque. I also blocked the PAIR line, which eliminated all of the popping and farting from the Yoshi on the overrun. I haven't dyno'd it, but you can really feel the difference in pull.
The Bandits don't make a lot of peak power, but the torque is huge and kicks in down low. This has added to it in a big way, giving instant extra roll on power in top, and it's smooth right down to walking pace now. I don't normally rave about products, but this has transformed the bike and I thought it was worth sharing with other 1250 owners out there. If you have a Bandit 1250 running lean, or have issues with the new GSX1250FA, this is worth doing. The kit is easy to fit. Dale is very helpful (and no, I don't work for him) and sure knows his way around Bandits of all flavours. If anyone was looking at his site and not sure if the hype was true (as I was), it's worth it.