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Above or below (not sure where the pics will go) are images of my current spark plug take a couple of hours ago before the thunderstorm, now why am I posting?
Well I have a modified R15, have just done some more mods and have tweaked my ecu fuel map. Now I got the bike back a couple of weeks ago, I have been running a CR9E(IX) plug for a couple of years on the old set up as recommended by Joel, these used to foul up every 1500 km's or so, now with the new set up I think my compression is reduced, the same colder plug would foul within 30-50 km's (although I have tweaked my ecu map at least 8 times in between) , so I changed the spark plug to a hotter one (stock rating, I think) stock is CR8E, I have a champion plug made for Bajaj 220 marked RG6HCC, the 6 is the heat rating which according to my research is the equivalent of NGK CR8E, the CC means double copper or something like that. The fuel map I have tweaked by feel, to give me a good base map, I intend to do a wideband AFR tune up soon, however I am sure with the old map the plug was fully black yesterday morning, I put the new map on yesterday and went for a 13 km ride each way (total 26km), this is the reading after that ride.
Now according to my eye/brain co-ordination, my reading is between 12 & 13 on the attached chart, which means I am close to where I need to be, however I don't trust my judgement, now can anyone give me an educated second/third or fourth etc.....opinion on the reading?
Well I have a modified R15, have just done some more mods and have tweaked my ecu fuel map. Now I got the bike back a couple of weeks ago, I have been running a CR9E(IX) plug for a couple of years on the old set up as recommended by Joel, these used to foul up every 1500 km's or so, now with the new set up I think my compression is reduced, the same colder plug would foul within 30-50 km's (although I have tweaked my ecu map at least 8 times in between) , so I changed the spark plug to a hotter one (stock rating, I think) stock is CR8E, I have a champion plug made for Bajaj 220 marked RG6HCC, the 6 is the heat rating which according to my research is the equivalent of NGK CR8E, the CC means double copper or something like that. The fuel map I have tweaked by feel, to give me a good base map, I intend to do a wideband AFR tune up soon, however I am sure with the old map the plug was fully black yesterday morning, I put the new map on yesterday and went for a 13 km ride each way (total 26km), this is the reading after that ride.
Now according to my eye/brain co-ordination, my reading is between 12 & 13 on the attached chart, which means I am close to where I need to be, however I don't trust my judgement, now can anyone give me an educated second/third or fourth etc.....opinion on the reading?
Attached Files
