Ide troubles with pd50 carbs

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Volker_P
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Re: Ide troubles with pd50 carbs

Postby Volker_P » Tue Jun 25, 2013 2:01 am

Ho to do float height measurements:
viewtopic.php?f=4&t=1342
viewtopic.php?f=4&t=6472

If you did it that way, all right. If not, go back there to correct it before you waste your time elsewhere. :wink:
Cosky's great (free) online manual: http://cosky0.tripod.com

forum links to common technical issues

my79650
Posts: 643
Joined: Tue Apr 06, 2010 11:37 am
Location: Gagetown, New Brunswick Canada

Re: Ide troubles with pd50 carbs

Postby my79650 » Tue Jun 25, 2013 1:35 pm

Damn; fuel delivery troubles; probsbly from floats not right. I tested all the ignition circuits; changed 1 ignitor box; then i pulled the filter and sprayed in some starter fluid; too off on all 4 cyl.

my79650
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Joined: Tue Apr 06, 2010 11:37 am
Location: Gagetown, New Brunswick Canada

Re: Ide troubles with pd50 carbs

Postby my79650 » Thu Jun 27, 2013 1:45 am

Pulled the rack off again. I checked the vent hoses for curiosities sake and it blows through clear for 1 and 2; but not so much for 3 and 4. Will put the compressed air to the vents and reset the floats. If one side(3 and 4) had bad venting would it make it act like it wasn't gettting fuel cause it wouldn't breathe properly?

MiGhost
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Location: South Central Mitten

Re: Ide troubles with pd50 carbs

Postby MiGhost » Fri Jun 28, 2013 12:50 am

my79650 wrote:If one side(3 and 4) had bad venting would it make it act like it wasn't gettting fuel cause it wouldn't breathe properly?


Yes. If the bowl vent is plugged. It will act like a fuel starvation problem. Oddly enough though. If the vent tubes are missing. They will allow the carb bowls to overflow. Acting like a flooding, or needle seat problem.

Make sure the floats are set correctly. The clear tube is the best method to make certain they are right.

Ghost
~ Ghost

PD50 Carb Info
82 CB650SC Brake Caliper Info

Stable
Wayward Son:1980 CB650C, RestoMod Period Custom Touring
Bad Moon: 1983 XJ750MK Midnight Maxim, Full Dress Tour Deluxe w/ X-1 Fairing
Nemesis: 1983 XJ750K Maxim, Old School style chopper

my79650
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Joined: Tue Apr 06, 2010 11:37 am
Location: Gagetown, New Brunswick Canada

Re: Ide troubles with pd50 carbs

Postby my79650 » Fri Jun 28, 2013 1:05 am

The tubes are fine; no rot anywhere. Set the compressor to 40lbs and let them have it; if there was anything in there its gone now; functions clear on both sides, even tho the problem was with 3 and 4. No clear tubing yet; but i did reset them again on all 4; now if it ever quits raining here i wil put them back on the bike.

MiGhost
Posts: 379
Joined: Tue Jun 07, 2011 2:30 am
Location: South Central Mitten

Re: Ide troubles with pd50 carbs

Postby MiGhost » Fri Jun 28, 2013 3:57 am

Mother nature was not nice to me today either. It opened up ,and downpoured just as I was getting ready to put the battery into the bike. Had to leave the bike out in the open to get a good soaking. Then just when I gave up, and covered the bike again. The sun came out in full glory.

Talk about a wicked sense of humor!!

Ghost
~ Ghost

PD50 Carb Info
82 CB650SC Brake Caliper Info

Stable
Wayward Son:1980 CB650C, RestoMod Period Custom Touring
Bad Moon: 1983 XJ750MK Midnight Maxim, Full Dress Tour Deluxe w/ X-1 Fairing
Nemesis: 1983 XJ750K Maxim, Old School style chopper

my79650
Posts: 643
Joined: Tue Apr 06, 2010 11:37 am
Location: Gagetown, New Brunswick Canada

Re: Ide troubles with pd50 carbs

Postby my79650 » Fri Jun 28, 2013 8:37 am

No change here in the weather haha; but i'm on a "staycation" for a week; i may yet have the carbs all sorted out. Meaning i took time off but have a list of stuff at home to do. i'll get the clear tubing today.

my79650
Posts: 643
Joined: Tue Apr 06, 2010 11:37 am
Location: Gagetown, New Brunswick Canada

Re: Ide troubles with pd50 carbs

Postby my79650 » Sat Jul 13, 2013 7:50 am

clear tubing works wonders when setting float height. No more overflowing or starving for fuel. Now to pull the rack again as it takes forever to come back down to idle. If i force the throttle back it will idle at 1500rpm. Linkage seems smooth to the last 1/4 inch. I may have something bent. For now i got a new pull cable for the 750 set that was on this machine when i bought it. Both cables are oiled and no binding when disconnected; i checked before i hooked them up to the rack. Something for a rainy day project; at least the 750 rack has a fully functional choke system.


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