Starter Valves - Surely It's All Been Said

[veefer2010]

Not quite.

I paid $200 to have the starter valves on my 2010 VFR800 professionally adjusted. "They were way out," they assured me.

Indeed, they still were.

I decided to adjust them myself which, with the information on this site, is a pretty easy process.

However, I was confused by comments in the Honda Manual and this forum about connecting/disconnecting the Manifold Absolute Pressure (MAP) sensor and the PAIR Valve solenoid. There seemed to be no consensus.

In the end I disconnected the IAT, MAP, PAIR solenoid and hoses, plugged the PAIR valves and found that I had to creep up on the adjustments. This meant doing the adjustments, putting everything together again and riding the bike for a couple of days. This process repeated four times over a few weeks and each time it was less bad until finally, with the final adjustment, all it needed was a few minor clicks of the valves. At this time I experimented to see what difference connecting the MAP sensor and the PAIR solenoid and hoses made. Answer: nuttin'. Diddly squat.

The idle speed or vacuum readings did not change whether I had the complete PAIR system connected or not. I even connected the MAP sensor to a vacuum line and it made no difference (although what Kaldek says about being sure to disconnect the MAP sensor while actually doing the SV adjustments makes a lot of sense).

By the way, the error codes on the 2010 model don't need to be reset. The IAT error code went away all be itself.

This next bit is sort of interesting: the Tacho.

For sure, the SV adjustment has to be carried out at 1200 RPM. The meter I bought has a tacho setting but it's for an old-fashioned coil, distributor and points system - completely bloody useless.

I decided to borrow an oscilloscope and connect it to the tacho pin (Gray ECU plug, Yellow/Green pin 17).

This worked very well but what I found was that the dashboard tacho is extremely accurate. For the last attempt at adjusting the starter valves, I didn't bother setting up the oscilloscope. It also helped that as the adjustments got closer to the mark, the revs didn't fluctuate that much.

For what it's worth

Ciao

[Auspanyol]

Cheers!!