Topic: Stuck on side of road AGAIN with this damn bike

[UPHOTO]

After a month at a horrible shop my bike is doing the exact same thing It was doing when i i i brought it in.

Running fine for a while then starts lurching and no throttle response.

Now it will start and rev (but sounds horrible) but will not move. Let out clutch and it dies.

Driving me nuts

[mgbgt89]

Hmm.. Hard to tell you what to do without specifics.

Lets start with what kind of bike.

[scottly]

Are you stuck right now? Open the gas cap, in case you have a plugged vent. Switch to reserve.

[UPHOTO]

Sorry guys......really bothered.

78 CB750F

Stuck right now. If I let it sit for 10-15 min then it will go for about 100-200yrds and then start lurching again and act like it's got no gas and then dies.

Just popped the cap and switched to reserve.

[UPHOTO]

Are you stuck right now? Open the gas cap, in case you have a plugged vent. Switch to reserve.

Whatever you just had me do seemed to help.  I actually made it the next mile home!  Thank you.

Not sure but that might be the problem.....

What exactly is my problem haha   

[scottly]

out of gas, or plugged gas cap vent (won't let air into the tank to replace the fuel as the motor uses it).

[UPHOTO]

Plenty of gas, filled it up a few days ago and have put maybe 20 miles on it.

Was running fine until now. 

I'll check the cap vent.

Thank you very much for the help.  I'm hoping this is it.

[UPHOTO]

Just an update.

Took the cap off and checked for any blockage.  Was able to stick a bobby pin into it and didn't have any issues.

Put it back on and went for a ride.

Ran fine for about 30 seconds and then same thing.  Switched it to reserve and ran like a champ.

Does that mean my petcock is clogged?

[gregimotis]

THe petcock is the next thing to check.  You'll have to drain the tank of course, but the petcock assembly is pretty simple to get apart, clean up and put back on.

Before you take it apart though:  disconnect your fuel line, and watch gas run out the petcock on standard and reserve.  It should 'run' not dribble, and it should continue to run any length of time.  It it does this, then maybe the problem is in the carbs (there are filters there too).

[gregimotis]

Also are you running the stock filter and/or an aftermarket external filter (he asks carefully).

[UPHOTO]

Thank you.

I'll check the petcock tomorrow.

I would hope it's not the carbs, that's just what was worked on for the past month (long story). 

It's got pods on it right now but the first time it happened it had the stock air box.

[GammaFlat]

My K6 had what sounded like a similar problem.  My "sock" in the gas tank was covered with silt.  The sock is the filter sticking upward into the tank - it's attached to the top of the petcock.  I removed the petcock, cleaned off the sock and was on my way.  My tank is original and although not "rusty", it does have some "imperfections" inside.  I'm thinking the silt is particles of rust. 

[UPHOTO]

I'm wondering if there is a bigger problem or if this is related.

Ever since I got it back from the shop it's been acting as if the throttle cable is sticking a little.  It will start up and idle really high and then when you hit the throttle it comes back down.  I haven't been able to see where the cable is sticking though.  

I have a feeling that there is something going on with the carbs but I just had a guy in there making sure everything was clean and he rejet the carbs.  Found the pilot jets were mangled so I ordered some, so it's been running a little rich at idle.

Now it could just be the petcock like mentioned above.  The bike did sit for 18 years (only 5k miles on it) and I'm sure that tank had some nasty stuff in it. 

[gregimotis]

My 'sock' had the same issue as Gammas except it was also rotted and crud had gotten into the carb.  This caused the bike to run great for about five minutes then die and start again in a few minutes.

This sock filter is available from western hills honda/yamaha (as are most things) (513-662-7759) for about 30.00 and it's no big deal to install.

Taking the carbs off, apart, and cleaning them is not a big deal either and does not require resynching as long as you leave the two adjusting nuts on the top alone.  It takes a little time and patience, but is not technically demanding... old bike, caveats apply.



Keep the thread going and we'll get you sorted.

[UPHOTO]

I really appreciate it.

I'll bump this thread up as I get time to work on the bike. 

BIG weekend, leave Friday morning (not on the bike) to go to Napa with the girlfriend for her 30th bday and to ask her to marry me.........damn.

So that's the only thing that will keep me from wanting to tear into this bike right away.

Thank you again for all your help.  Can't wait to be able to actually add something to this community once I get to know more about these bikes.

[CBGhia]

Hey,  Congrats!!  or at least Good Luck! 

[faux fiddy]

 

BIG weekend, leave Friday morning (not on the bike) to go to Napa with the girlfriend for her 30th bday and to ask her to marry me.........damn.

So that's the only thing that will keep me from wanting to tear into this bike right away.

Thank you again for all your help.  Can't wait to be able to actually add something to this community once I get to know more about these bikes.

Arrgh!  As Louden Wainright says about  "I wanna run up and tell them it's a trap, it's a trick" ... people in love...

I guess this really means goodbye forever, She'll be looking  over your shoulder, and being on this forum will be worse than chatting on loose babes4U.com...

[madmtnmotors]

See pict. Item 3, of subassembly 1, is an in-tank screen filter that is the same as my 78CB750K. Remove the petcock (after draining fuel) and you will see a plastic sleeve inside the tank nipple fitting that the petcock reserve tube fits into as the petcock is attached to the tank. The plastic sleeve inside the tank is a filter screen (not the plastic tube connected to the petcock, which is the reserve tube, but the plastic sleeve inside the tank fitting). After 30+ years these can be difficult to remove and you will likely destroy it getting it out so be prepared to run an in-line fuel filter. I skipped the in-line filter when I did mine and had to pull the carbs for cleaning shortly after so I highly reccommend an in-line filter.

[UPHOTO]

See pict. Item 3, of subassembly 1, is an in-tank screen filter that is the same as my 78CB750K. Remove the petcock (after draining fuel) and you will see a plastic sleeve inside the tank nipple fitting that the petcock reserve tube fits into as the petcock is attached to the tank. The plastic sleeve inside the tank is a filter screen (not the plastic tube connected to the petcock, which is the reserve tube, but the plastic sleeve inside the tank fitting). After 30+ years these can be difficult to remove and you will likely destroy it getting it out so be prepared to run an in-line fuel filter. I skipped the in-line filter when I did mine and had to pull the carbs for cleaning shortly after so I highly reccommend an in-line filter.

Thank you.

That helps me a lot.  I'm going to pick up an in-line filter just in case.  At least that way if I get a clear version I can see if there is blockage without having to drain the tank.

[UPHOTO]

Well somebody beat me to it!



Their was an inline filter, it was mounted in between two carbs and I never saw it. 

It was clogged.  I pulled the petcock just to make sure and there was no filter/sock on around the tube.

Put on a new filter and filled her up with gas and everything is good.

Thank you everybody.
 

[Stev-o]

BIG weekend, leave Friday morning (not on the bike) to go to Napa with the girlfriend for her 30th bday and to ask her to marry me.........damn.

NO - don't do it! Get married that is, you're too young!! Go to Napa, drink a lot of good wine and just have fun!

[westondc]

i just started reading this thread and i was thinking it must be an in line fuel filter problem. Then i read your last post and sure enough, fuel filter. I had the the same problem but my filters kept filling with air boubles. I lined the tank and said F it and took out the filters.

[Popwood]

Hey, congratulations and good luck on the proposal and marriage. Clearly, there are many for whom it hasn't worked out but I think there's still a majority that it has. I'm going on 40 years married this year and it's been really really good. Ups and downs of course, but wouldn't do it differently. Taking the leap is always a risk, but risk can also mean reward.

Have an excellent weekend. The bike will be there when you get back. She's probably a bit more patient. 

[my78k]

30 isn't too young! I was 23 and best decision I have ever made! Had my first kid at 24 second at 27. I am only 35 and now the girls are at the point where they can fend for them selves more than just a bit and I get to sleep in on Satrudays while my buddies complain about changing diapers in the middle of the night! I am hoping that they will be through college or whatever early enough the wife and I can enjoy ourselves and maybe retire early. Not too worried about kicking them out at 18 or anything!!

Dennis

[UPHOTO]

hahahaha....

You guys are funny.

I'm 35.  Got married at 20 and was married for 12 years.  Just wasn't meant to be.

This is.

She doesn't like the idea of the bike but would never get in the way of something I truly have a passion for.  That's a keeper.

Rode the bike tonight on a 65 deg night in Reno and it was amazing.