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finally got some test rides in

  • Thread starter Thread starter yotaman423
  • Start date Start date
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yotaman423

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ok so after winter maintance i got ride a few times. i have a 80 850L stock bike except for mystery exhaust. rebuilt carbs via bike cliff site instructions using robert barr o-rings. and valves adjusted in spec. so after cruising at around 55 or so bike seems to start losing power. like its running out of gas of flooding dont know which. rode for about a minute at 70 and bike totally lost power had to gear down to keep it running on the shoulder. it wsa like it was running on two or three cylinders. fethered the throttle and eventually came back. so i dont know where to start looking for what i missed or did wrong. i did put a lawn and garden in-line fuel filter on. would this restrict fuel flow? any help appreciated thanks.
 
yotaman423 said:
ok so after winter maintance i got ride a few times. i have a 80 850L stock bike except for mystery exhaust. rebuilt carbs via bike cliff site instructions using robert barr o-rings. and valves adjusted in spec. so after cruising at around 55 or so bike seems to start losing power. like its running out of gas of flooding dont know which. rode for about a minute at 70 and bike totally lost power had to gear down to keep it running on the shoulder. it wsa like it was running on two or three cylinders. fethered the throttle and eventually came back. so i dont know where to start looking for what i missed or did wrong. i did put a lawn and garden in-line fuel filter on. would this restrict fuel flow? any help appreciated thanks.
Click to expand...
Remove the filter and try it , some of these in line filters are not big enough to flow enough fuel. From what you said that it was losing power and a cylinder or two at speed would tell me a fuel restriction
 
will try that tomorrow. i will also add i put new intake boot o-rings,airbox to carb boots, sealed airbox.and synched carbs using carbtune. before winter when i got the bike i rode a 900 mile round trip with no problems at all
 
Hi,

Check that the gas cap is venting properly. It can be taken apart and cleaned. Also check that the little hole in the filler neck of the gas tank is clear.

fillerneckhole.jpg



Is the float height set properly? Did you check the float bowl gaskets for the proper punch-out configuration? Not all float bowl gaskets are the same. I think this is for the #2 carb.

gasket_comparision.jpg


If you have to use an inline filter then perhaps your gas tank is not a clean as it should be. If everything is clean then an inline filter is unnecessary.


Thank you for your indulgence,

BassCliff
 
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i was using the inline filter as a precaution after all my carb disassemble and cleaning. but if its not necessary then i will take it off. i never noticed that hole in the filler cap either just had the tank painted so i will check that also. float height? i did my best to get it right by diagrams 2mm if i remember right. ill start with the easiest things first. i dread opening the carbs up again.
 
Hi,

Check your petcock for proper operation too. Make sure there are no kinks or loops in the fuel or vacuum lines. Keep us informed.


Thank you for your indulgence,

BassCliff
 
yea i took petcock apart and cleaned it. should have got a new one:confused:
 
ok guys i removed the in line filter and no change. the bike did the same thing at the same spot in the road. just curious could this be related to mixture setting at all? i tried my best to get the highest RPM method as describe on basscliff site. im really proud of this bike and the work i have done so far and i want to be able to ride faster than 45 mph so any help would be great. i guess my next step is to pull the carbs back off and recheck what? also could it be coils or plug wires i think they are original and have some cracking on the wires. Thanks Guys:o
 
I would investigate ignition first. Your bike needs 3 things: Air, fuel and spark. Since you have already worked in the first 2, I would look at the 3rd. There is a way to replace the spark plug wires, and the suppression caps are readily available. Or the dyna wire set is available from vendors such as Z1.
 
i wanted to put new wires and caps on and found out the wires were made into the coils. new dyna green coils and wires and caps is like 150 bucks that i don t really have. also the bike starts and idles and runs great until i get up to about 55 for a few minutes then starts bogging down
 
Hi,

I suppose it's possible that the igniter is thermally intermittent. But do all the simple stuff first, plugs, plug caps, etc. Just in case, check the electrical page on my website for lots of ignition troubleshooting tips.

Someone should also say that sometimes it takes two or three tries to properly clean the carbs.


Thank you for your indulgence,

BassCliff
 
called my local suzuki shop and described the problem at hand and he suggested an air leak somewhere that shows up at higher speeds.could this be my problem? i will check my bike for all possible leaks again
 
yotaman423 said:
i wanted to put new wires and caps on and found out the wires were made into the coils. new dyna green coils and wires and caps is like 150 bucks that i don t really have. also the bike starts and idles and runs great until i get up to about 55 for a few minutes then starts bogging down
Click to expand...
The wires only LOOK like they're made into the coils. Check BassCliff's site, he's got a how-to with pictures there on the removing the old wires and installing new. It can be done, not all that hard either.
 
ok so im pullin carbs back off this weekend and cleaning and rechecking everything hope this solves my problem. well got the bank off and bowls off so far. i wanted to recheck float height and they are dead on 22.4mm but i did see this rubber ring missing. do i need it is it a seal for the plug underneath? tomorrow i will strip and clean again
DSC00370.jpg
 
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bike back together and running.will an exhaust leak affect me trying to dial in the mixture with the highest idle method?
 
Hi,

Exhausts leaks can affect the flow but you should be able to get it close enough. Where is your exhaust leaking? Exhaust gaskets are pretty cheap. I've even seen people make their own connector gaskets from sheets of exhaust gasket material.



Thank you for your indulgence,

BassCliff
 
they might be leaking at the head. i was saving my new gaskets for when i get a new exhaust but i know its leaking at slip joints further back somebody butchered the exhaust at some point but it works for now
 
ok so my fuel starving problem is still there after crusing for a while between 55-60 bike starts to die. so i tried pulling the choke and it stays running. dirty carbs again?
 
I know you said you tuned the carbs using the highest RPM method, but where are your mixtures screws set now?

.
 
just recently set them all to 2.5 i have bigger mains 122.5 and pilots can t remember and VH 4-1
 
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