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I'm done

  • Thread starter Thread starter Rob Rorick
  • Start date Start date
R

Rob Rorick

Guest
Been fighting with my 850 for 3 weeks and nothing is working. Bike idles fine but as soon as it get some throttle is falls flat on its face. Carbs rebuilt balanced. Nothing seems to change it. Unless there's someone in the gettysburg pa area that can show me what I'm missing it may head to the scrap yard.
 
Did you use Nessism's procedures at Basscliff's site to clean them and were all orings replaced? What are the mixture screws set at?
 
Screws are set to 2 1/2 out. Didn't rebuilt the diaphragms and that could be the issue. Could very well be the issue and have the parts just not the tools. Just don't know if I want to deal with it any more.
 
Rob Rorick said:
Screws are set to 2 1/2 out. Didn't rebuilt the diaphragms and that could be the issue. Could very well be the issue and have the parts just not the tools. Just don't know if I want to deal with it any more.
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Do yourself a favor, box them up and send them to member Steve. He'll do them right, replace what needs to be and you'll get them back ready to roll. Don't give up yet. Carb cleaning money is some of the best money spent!
 
Did you look through the Newbie Mistakes thread to see if you are overlooking anything?
 
2 comments from me:
1) how long have you owned this bike? (a little history would be helpful)












2) by all means don't and I repeat do not take it to the scrap yard.
 
Here's the other thing. I rode it from my buddies house 7 miles away. Didn't run great but got me to my house. Git to my place and it became a crap show.
 
is the airbox on?? pods??? open carb faces??? Give us some in formation to work with here before you send things off and get your blood pressure too high.
 
Alke. Have been getting parts for about week and been on it for about two weeks. So maybe a month total. I can fix just about anything. I'm just getting beat up and losing hope. When I got it it was varnished pretty good. Cleaned everything and rebuilding. Actually pulled them apart twice and cleaned the carbs twic .
 
All tuning done with stock air box. Would rather have kept it original.
 
This thread reminds me that carb rebuilds can be challenging but there are members here willing to do the work. It would be a $200 (total shipment & parts/labor) investment I would support.


Ed
 
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Reading thru your other posts you never described exactly how you cleaned and rebuilt the carbs, give us some info, it will help diagnose. As well it seems your bike has a 4 into 1, possibly the PO did some changes to the carbs, did you check all the parts including the main needle to confirm their sizes, post them up once you do. Have you checked the electrics to make sure they are working properly? Like everyone has said, more info needed.
 
Hes down from the ledge. Hes got some reworking to do seeing he only dipped the carbs for maybe 2 hrs. My advice was to redip them for at a minimum of overnight and I told him I ( and most everyone here ) goes a full 24 hrs. Told him to follow the rebuild guide I linked.

I also linked the oring kit from Robert Barr. Old carbs need the new orings to perform right again. Also talked about the valve adjustments with him as well. Told him how to make a bowl fuel level gauge and to do that check also.

If he backs up the train and gets thing realigned he is gonna be fine.
 
Rob...another thing to check is the tank petcock for function and good fuel flow.

Take a line from the big nipple and put it in a clear jar. Then take a vac line to the small nipple and set the lever in the ON position. Suck on the vac line and the fuel flow should be real solid and strong. When you let off the suction fuel flow should stop. Set it to REServe and do the suction again and see that it works the same way on REServe. Set it to PRIme with no suction and it should flow...set back to on and it should stop flowing.

If there is a weak fuel flow, then the next suspect is a partially clogged filter inside the tank. drain the tank down and remove the petcock and see that the inside filter isnt plugged. Dont use an inline filter between the tank and carbs though..this is just another restriction added that isnt necessary.

Lastly..replace the fuel line from the tank to the carbs. The rubber does break down and tiny specs of junk can get washed into the carbs and plug up jets.
 
Rob Rorick said:
Unless there's someone in the gettysburg pa area that can show me what I'm missing it may head to the scrap yard.
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I saved one other bike that was headed for the scrap yard several years ago. Only had to go half as far to get it, but if you are REALLY desperate, I'll come pick it up for you. Or maybe meet you half way?

.
 
And yet more...LOL Note that the petcock draws its vacuum off the brass nipple at the top rear of carb 2. If youre using a gravity tank to run the bike, this nipple has to be blocked off to eliminate the massive vacuum leak it s creating. And, what condition is the inside of the tank??? If its all crusty, rusty and otherwise not looking too good, give me a call for some tips on getting it clean without ruining the paint.
 
Alright folks. Thanks for the help. Extra points to you chuck. After we had a long talk I'm starting over. Breaking everything down tomorrow and starting at square one.
 
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