Hi Andy
Many thanks for the useful tip re disconnecting the TPS plug.

There is so much I don’t fully understand about these Valves eg I didn’t even know what the RC stood for ‘Revolutionary Controlled’ which isn’t a really good start.

The main thing I was worrying about (hence fitting DMR_JAPAN's RC Valve Pulley on a MC18 fitted with an MC28 Engine) was, although setting up these RC Valves using the Honda Manual is ok on Standard configurations, I am very unsure, probably like many others, as to the amount of cable movement given its Rotation, Pulley Diameter, a MC18 R5K RC Servo motor would have when mating up to a MC28 R3S RC Valve making the Servo constantly struggle to either fully open or close the RC Valve when riding.

It would be nice to say they are the same, however, I think the chances of that would be very unlikely at best!

Although DMR_JAPAN's RC Valve Pulley should give some degree of protection I don’t think there’s a magic bullet to solve this issue, unless someone has done it before! hopefully please please.

The only sure way I guess is by setting up a test rig to measure it all, which then would require knowledge of what resistance values are fed back from servo unit to the PGM against RPM, the voltages sent to the servo at those RPM, a variable DC Voltage supply and a way to measure it all, not to mention access to a MC28 and MC18 to compare it all with; or use of a rolling road.

Think I’m going to find a dark corner somewhere LOL.