WFO
Member
- Dec 27, 1999
- 84
- 0
I'm having trouble jetting my '97 YZ 265. Eric Gorr set it up for pump gas and the bike is stock except for a PC pipe and a Boyenson reed. When I got this bike, the jetting was stock other than the main being one size leaner (I quess this was to compensate for the reed).
After the bore job, I assumed that the bike would probably be slightly rich. There was a slight gurgle (like it was loaded up) just past 1/8 throttle. Raising the needle clip helped, but didn't eliminate the gurgle. Adjusting the air screw doesn't seem to make much difference, plus the bike is hard to start.
I went from a 48 pilot to a 45. Starting was still hard and the bike "popped" when I chopped the throttle. I went back to the 48 and the popping stopped.
I gather from reading Canadian Dave's dissertation on carbs that my next bet would be the cut-away or the jet needle.
Question; does any of the preceeding make sense? Am I completely off base here? I don't want to just start buying parts and just quessing if I'm going in the right direction. What jetting changes have you other 265 owners made?
Secondly, if I am on track, where do you get jet needles and/or slides? I can find no source as of yet.
After the bore job, I assumed that the bike would probably be slightly rich. There was a slight gurgle (like it was loaded up) just past 1/8 throttle. Raising the needle clip helped, but didn't eliminate the gurgle. Adjusting the air screw doesn't seem to make much difference, plus the bike is hard to start.
I went from a 48 pilot to a 45. Starting was still hard and the bike "popped" when I chopped the throttle. I went back to the 48 and the popping stopped.
I gather from reading Canadian Dave's dissertation on carbs that my next bet would be the cut-away or the jet needle.
Question; does any of the preceeding make sense? Am I completely off base here? I don't want to just start buying parts and just quessing if I'm going in the right direction. What jetting changes have you other 265 owners made?
Secondly, if I am on track, where do you get jet needles and/or slides? I can find no source as of yet.