Hi,
My sons kx85 -17, sometimes bogs when he shall make a start at 2:nd gear. It was worse with the Pro Circuit pipe/silencer so I changed back to the HGS exhaust-system and thought I "solved" it because the bike didnt bog anymore when he did the start training.
But now the problem seem to come back.
I run the stock jetting. According to the manual for our current weather (temp + altitude) Stock should be the right setting. And the bike runs very well on the track, it also answers well when twist the throttle with no gear.
I did tried bigger jets but it didnt solve the issue of boging.
I have cleaned the exhaust valve so I dont think that would be the issue either. (bike has about 30h and the piston about 10) It did bog also right after the piston was changed
Sometimes he can make 3-4 starts on 2:nd and it works fine and then for the next starts it bogs right after he let go of the clutch. Maybe the increased engine temperature makes it bog?
When start at 1:st gear there is no issue.
Any ideas?
//Mikael