02-12-14, 10:23 AM
Going well with Ivanising the carbs... just waiting for my replacement gaskets and float needle/seat to arrive from the UK and have done most of the Ivanising tasks.
Tonight I completed probably the one everyone dreads... drilling out the two pilot bypass air holes. I followed the instructions on Pat's site and it went well - although the angle you need to drill at means you end up drilling an angled holes... and now I'm worrying that I've drilled them too large... see pics below (first is standard sized holes, second is enlarged two as-per Pat's/Ivans instructions - these are pictures from different carbs).
A quick question - with the butterflies shut would you usually expect to see a very small part of the first pilot hole (closest to the mixture screw) or is it completely covered by the butterfly? At the moment mine is completely covered. Also I noticed carbs a little out of sync (visually when looking at butterfly edges and first pilot hole) - is setting the balance by eye at slight throttle openings a good idea/relatively accurate?
Tonight I completed probably the one everyone dreads... drilling out the two pilot bypass air holes. I followed the instructions on Pat's site and it went well - although the angle you need to drill at means you end up drilling an angled holes... and now I'm worrying that I've drilled them too large... see pics below (first is standard sized holes, second is enlarged two as-per Pat's/Ivans instructions - these are pictures from different carbs).
A quick question - with the butterflies shut would you usually expect to see a very small part of the first pilot hole (closest to the mixture screw) or is it completely covered by the butterfly? At the moment mine is completely covered. Also I noticed carbs a little out of sync (visually when looking at butterfly edges and first pilot hole) - is setting the balance by eye at slight throttle openings a good idea/relatively accurate?