Block off plates

[NovaCB1100_imp]

Good job- but no need.

The pop off the main supply line hose to the airbox and plug it. I used a standard vacuum cap from the local auto parts store- small enough to invert and stick in the hose- worked perfect- and then put the hose back on the airbox. Easy enough to remove if needed...and my valve cover looks normal.

Those look exactly like the OEM reed valve in the valve cover of my CBR250R. It vents crankcase blow-by out of the valve cover.

The parts may be the same- but no, they aren't for crankcase vent- they blow in, not out. Air injection - the AI part of PAIR.

The parts may be the same- but no, they aren't for crankcase vent- they blow in, not out. Air injection - the AI part of PAIR.
Thanks Powerdubs,

I also did the air injection removal with my Thruxton, and there was a very similar procedure as you describe above for the Triumph aircooled twins. Either way, very pleased with the results! Now for suspension....

Oh and a new battery as the OEM died this morning. 7 years, not too bad.