@terry-tz they only go so small I’m on a 32 lowest is 30 I care from a 36 I believe but it’s still way too much I roasted an head gasket because I had the af screw too far out to combat the problem (I knew the risks)
@oldman There won't be much difference at wide open throttle, but at part throttle, the air can seep around the round slide, causing the fueling to be ever so slightly lean. It's not going to cause any issues, but that's a draw back of the round slide.
@declan The dellorto round slide probably has a power jet.
@runes Sounds to me that the mixer screw is the problem, as the mixture is wrong. It's either rusted or been abused and consequently the engines fuel/air mixture is wrong. If the plug is getting wet, surely that's from over fueling and the engine running too rich? Which would cause the starting problem you are experiencing.
I would get a new mixer screw fitted before doing anything else, so that you can adjust the mixture correctly and hopefully that should solve your problem. Then that way you will know for-sure if the engine's mix is correct and eliminate that from your suspected fault list before throwing a ton of cash on it. What RPM does the bike idle at???
Well it's broken isn't it.
I will ask that this is a separate problem and as such should be placed within the appropriate section, rather than reeds.
There are suppose to mount the exhaust to the frame with a rubber dampener. I guess Yamaha would be the place to get another one.
I never ran that one to be honest anyway.
@Jens-Eskildsen Absolutely, unless you have a DTRE CDI where it closes the port at 10K RPM. But earth the green and black wire behind the clocks and BOOM! Full power. Easiest bike to derestrict. It's like the Japs knew