Grand Prix 500
Main Motorcycle: '99 Triumph Adventurer
Join Date: Apr 2012
Other Motorcycle: '91 Honda XR250L
It sounds like you have a good idea. Keep in mind what you want to accomplish. If you are getting proper jet sizes and needle positions, would you install different jets in different carbs due to a different reading between the headers? If not, then one is probably good enough.
It would be interesting to get readings from the bung you install, then take the sensor and put it in the muffler exit and see what difference you get, if any.
One idea that MIGHT be worth checking is an adapter for the CO sniffer bung. If the sensor does not have to be right in the stream, that might be good enough. The ratio of the different gases is probably going to be the same just outside the stream, within an adapter, as it would be within the stream.
Another thing would be to simply replace the CO sniffer bungs with the larger O2 sensor bungs. If you ever needed to use CO you could presumably get an adapter to go the other way. This is assuming your CO bungs are not being used...
It might be an idea for someone to buy one of these and rent it out to others on the forum so they can get their jets right, assuming a muffler reading is good enough. 3 or 4 rentals might pay for the thing.
Last edited by PaulBx; 10-23-2012 at 02:11 PM.