D
donimo
Guest
If you need any more specs let me know, but I can't think of anything that hasn't been tried... 
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M
MrZig
Guest
I took shop air & good spray solvent to every part of the completely dissasembled carb I could. Everything carb wise is as clean as I can get it.
One thing though, I noiced in the female part of the carb body where the needle jet slides into, there seems to be a small hole in the middle of that, where does it go?
One thing though, I noiced in the female part of the carb body where the needle jet slides into, there seems to be a small hole in the middle of that, where does it go?
Regarding your earlier post, the gas cap itself has a vent. It can become clogged when years of fumes become a varnishy film. If the venting is compromised, you can get fuel starvation, most noticable at steady speeds.
I mentioned it because it's quick to clean it and re-rest. From what I read it sounds like your float bowl vent lines are clear.
Have you tried testing with the petcock in PRIME position?
I mentioned it because it's quick to clean it and re-rest. From what I read it sounds like your float bowl vent lines are clear.
Have you tried testing with the petcock in PRIME position?
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MrZig
Guest
After getting the carbs back on if it still bogs down I'm going to try choking it, and taking the cap off to see if it makes a difference. I did run it in prime with no difference.
I also just did the coil relay mod and I'm getting good spark, however I noticed that before the mod I was losing 2 volts. It may make a difference, may not, we'll see.
I'm also getting new main jets which come stock on my type of carbs. The ones on mine are 3 sizes too small, that may make a difference as well.
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OK. Good luck with it.
The mains should be stock anyway. Generally, the smaller mains should only effect 3/4 to full throttle but it's still possible that 3 sizes smaller could have the effect you describe. It's the smallest opening in the circuit that regulates flow. You would think that the space between the jet needle and needle jet would be adequate (at the throttle position your problem is noticable) and uneffected by a smaller than stock main but since the mains should be stock anyway it's worth a try.
The mains should be stock anyway. Generally, the smaller mains should only effect 3/4 to full throttle but it's still possible that 3 sizes smaller could have the effect you describe. It's the smallest opening in the circuit that regulates flow. You would think that the space between the jet needle and needle jet would be adequate (at the throttle position your problem is noticable) and uneffected by a smaller than stock main but since the mains should be stock anyway it's worth a try.
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MrZig
Guest
Yeah I know, right? The weird thing is, the needle jets and needles were completley clean in both carbs, same with the main jets. I just don't know why that would cause such a dramatic bogging effect that I had. I wonder if it's igniton or cam timing.. I doubt it, because 0-60 times are generally pretty good.
M
MrZig
Guest
Ok I did a coil relay mod giving full battery voltage to the coils, as I was losing at least 2 volts. I also got the new intake boot and sealed it around the airbox with black tape. Everything is aligned good. I plugged the drainage and crankcase breather holes on the airbox, too. Is there anything 'bad' with leaving the crankcase breather open to the atmosphere?
I also cleaned the carbs out, set the pilot needle out two turns, installed new spark boots and fired the bitch up. After warming it up, and lubing the chain, I took it for a real ride and the hesitation/bogging seems to have dissapeared. I used to have a missfire just cruising at 50 KPH and that's gone, and I didn't get much of that major bogging, either. Yay! Only time will tell now
Oh I also noticed that I'm losing oil. When I did my oil change I set it to the high mark on the dipstick, and after two 1 hour rides and some garage-running, the oil level was near the low mark. There are no obvious drips of oil on my carport floor, and it doesn't blow blue smoke or smell of burning oil. I did notice that the end of the crankcase breather hose was oily. could that be the culprit?
I also cleaned the carbs out, set the pilot needle out two turns, installed new spark boots and fired the bitch up. After warming it up, and lubing the chain, I took it for a real ride and the hesitation/bogging seems to have dissapeared. I used to have a missfire just cruising at 50 KPH and that's gone, and I didn't get much of that major bogging, either. Yay! Only time will tell now
Oh I also noticed that I'm losing oil. When I did my oil change I set it to the high mark on the dipstick, and after two 1 hour rides and some garage-running, the oil level was near the low mark. There are no obvious drips of oil on my carport floor, and it doesn't blow blue smoke or smell of burning oil. I did notice that the end of the crankcase breather hose was oily. could that be the culprit?
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