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Discussion Starter #1
My VFR1200 was restricted to 60% power in the first 3 gears (2 in usa and canada) and had a top speed limiter in 5th and 6th, I had my ecu flashed by Don Guhl to remove these and add a PC-V fuel map and raise the rev limit by 500rpm. After the flash and decat it was like a friggin missile !
So How is the GSXS restricted ?
 

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My guess , ECU flash with fuel corrections on a dyno 5-10 HP, remove the exhaust restrictions and air box mods with ECU flash and dyno 10-15 HP, that's only my approximations
Apparently the timing is restricted in the first 4 gears but just removing that alone I would not think does much at all


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Discussion Starter #4
Yeah I read about the first 4 gears, and the ecu flash top speed run shows a higher speed , so top speed limiter exists to I presume.
 

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Yeah I read about the first 4 gears, and the ecu flash top speed run shows a higher speed , so top speed limiter exists to I presume.
On the standard ECU the ignition timing is retarded below WOT on the first 3 gears - more so in 1st gear than 2 and 3. The ignition Map is identical on gears 4,5 and 6.

Above 11,000 RPM in 6th gear the ECU close the STP 50% to restrict the top speed
 
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