JaredK
82 DOHC
Lou: yeah, I was wondering if the p.o. changed the jet to compensate for another issue. Or maybe he stripped the original #117.5 and could only replace it with a #120 - I checked XS650 direct, who carries parts for the BS34 carbs on the DOHC bike, and it looks like they don't carry the #117.5, only the #115 and #120. Maybe I'll check with my local dealer. (Manual says #127.5 LH and #117.5 RH).
bcware: thanks for the tips.
- Diaphragms looked perfect the last two times I pulled the carbs apart to clean them.
- Air box is clean, and I blasted the filter out with compressed air. I'll clean it again, or think of replacing it.
- The rubber o-ring and washer for the mix screws were both replaced during the last carb rebuild.
- I've tried testing the butterfly seals by spraying the outside of the carbs with starter fluid, or fogging oil. Neither seemed to make the RPMs fluctuate, although the seals on the inside of the carbs are harder to get to. Might just order new ones for the next rebuild.
- The exhaust baffles had just a bit of surface rust, but they cleaned up and look good.
Also, the plugs on the carb boots are sealed off on both sides (I converted the petcock to an on/off when the diaphragm got a tear in it. haven't rebuilt it yet).
The choke/enricher does seem to act a bit funny. If the bike is idling and I put the choke on, the bike will die. If I rev up the engine to 2.5k or 3k and then pull the choke out half way, it will generally stay up there for a few minutes. Occasionally it falls back down and needs a bit of throttle to get it back up to 3k, and then it'll stay there while the choke is still on. Once I start riding and the bike warms up it idles fine down at 1.5k (I bumped up the idle so the throttle doesn't take as long to get above 2k when I'm ready to go again).
bcware: thanks for the tips.
- Diaphragms looked perfect the last two times I pulled the carbs apart to clean them.
- Air box is clean, and I blasted the filter out with compressed air. I'll clean it again, or think of replacing it.
- The rubber o-ring and washer for the mix screws were both replaced during the last carb rebuild.
- I've tried testing the butterfly seals by spraying the outside of the carbs with starter fluid, or fogging oil. Neither seemed to make the RPMs fluctuate, although the seals on the inside of the carbs are harder to get to. Might just order new ones for the next rebuild.
- The exhaust baffles had just a bit of surface rust, but they cleaned up and look good.
Also, the plugs on the carb boots are sealed off on both sides (I converted the petcock to an on/off when the diaphragm got a tear in it. haven't rebuilt it yet).
The choke/enricher does seem to act a bit funny. If the bike is idling and I put the choke on, the bike will die. If I rev up the engine to 2.5k or 3k and then pull the choke out half way, it will generally stay up there for a few minutes. Occasionally it falls back down and needs a bit of throttle to get it back up to 3k, and then it'll stay there while the choke is still on. Once I start riding and the bike warms up it idles fine down at 1.5k (I bumped up the idle so the throttle doesn't take as long to get above 2k when I'm ready to go again).