New Stock 39mm pwk jet block solves over rich issue
Posted: Mon Dec 13, 2021 8:19 pm
My oem stock 39mm on my 91 500 needle jet wore oblong. Tried to punch it out and replace from the jet block, didn't work out so well. Ended up crushing the chamber ruining the jet block.
Went craigs list shopping and found a like kind 39mm short body with the understanding it was off a 03 ktm 300. Appeared to be a mirror copy of the oem version.
Inserted proper jet sizes, needle. The needle was sticking in needle jet opening. Won't try to swap it out, i learned. So i got to drill it to size.
Replacement carb seller thereafter informed me the carbs off a 125 not 300. Likely explains the problem, hopefully no other sizing issues arise.
I need an accurate known size of the needle jet. Can't trust my worn out one in the prior carb, i damaged it further in failed removal.
Anyone?
Idea to determine: Insert needle in existing oem 39mm jet block / center hole, mark where it stops going into needle jet (top) then mic that spot. Does that seam valid? It isn't tapered I understand.
Went craigs list shopping and found a like kind 39mm short body with the understanding it was off a 03 ktm 300. Appeared to be a mirror copy of the oem version.
Inserted proper jet sizes, needle. The needle was sticking in needle jet opening. Won't try to swap it out, i learned. So i got to drill it to size.
Replacement carb seller thereafter informed me the carbs off a 125 not 300. Likely explains the problem, hopefully no other sizing issues arise.
I need an accurate known size of the needle jet. Can't trust my worn out one in the prior carb, i damaged it further in failed removal.
Anyone?
Idea to determine: Insert needle in existing oem 39mm jet block / center hole, mark where it stops going into needle jet (top) then mic that spot. Does that seam valid? It isn't tapered I understand.