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carb. leak

  • Thread starter Thread starter terrylee
  • Start date Start date
T

terrylee

Guest
I know this has been on here lots of times, but I just want to verify my thoughts. I just cleaned the float bowls and checked the float heights on my sons' 79 850, and checked the float needle valves. (I know a complete cleaning is better), He rode it today and of course some gas came out of carb. #2 float drain after stopping for a while. Petcock is new and set on "on". So I figure it is the float needle valve or seat causing the float to let gas in. I know it is poss. I broke a piece of dirty loose and it lodge and not letting the needle or float work properly.:confused:
 
Sounds like a "pulling of the carbs" is in order. I would suggest new float needles as the nitrle tips harden over time and fail to seal tight. :-\\\
 
Dave8338 said:
Sounds like a "pulling of the carbs" is in order. I would suggest new float needles as the nitrle tips harden over time and fail to seal tight. :-\\\
Click to expand...

No rubber tips on GS carbs.

Regarding the problem at hand...you are newbie number 5,282 that shortcutted the carb rebuilding process and now have to do it a second time. You won't be the last I'm sure but if you want to avoid doing the job three times I suggest a full carb tear down and replacing all the various O-rings with a kit from cycleorings.com. While you are there I strongly suggest replacing the intake boot O-rings as well, and perform a valve adjustment.

PS: the GSR homepage has carb rebuild tutorial guide in the Garage section - look for the VM carb guide.

Good luck,
 
I'll bet you a dollar that the oring that is around the float needle housing is the cause of the leak. They are available from Suzuki & you should change all 4. Ray.
 
rapidray said:
I'll bet you a dollar that the oring that is around the float needle housing is the cause of the leak. They are available from Suzuki & you should change all 4. Ray.
Click to expand...

I'll take that bet Ray if you make it a beer.:D Needless to say I'd win since the VM carbs didn't use an o-ring on the float needle seat.:-\\\
 
carb. leak

Thanks guys! I just did a valve adjust. And I know this is a short cut but the carbs. were cleaned by po last summer, and I'm planning on doing complete breakdow this winter. The only reason I did this was because my sons' bike would rev. high sometimes when he stopped after engine was good and warm. So I figured one of the floats was sticking or levels were off. I plan on pulling the carbs. as soon as I get new needles. Also I have didn't take the carb. intake boots off, so I was sure it had intake o-rings since its a 79 VM carb. PS, figured out reving was due to frt. carb. lever where frt. cable attaches sticking, think I may have solved that problem. :o
 
High reving at idle is a sign of air leaks. This condition will damage the engine by making the mixture too lean - the high idle is just a symptom.

Regarding the needles, most likely the ones you have are fine - only way to tell is to pull the carbs apart and inspect them.
 
carbs.

carbs.

Does the 79 gs850GN have o-rings in the intake boots?:confused:
 
Rudeman said:
Yes, they all do. While you have the boots off, check them for cracks.
Click to expand...

Make that almost all.:)

Some of the first year 750's didn't have the O-rings and I think the 400's as well. Then the second generation 16V 750/1100's didn't use them either but the 3rd generation 750 went back to them. I'm not sure about the 1150 - feeling too lazy to look it up.:p
 
terrylee said:
And I know this is a short cut but the carbs. were cleaned by po last summer,
Click to expand...
The ONLY time you can shortcut a carb cleaning is when you know how they have been treated since the last FULL cleaning. :|

If there was a PO involved during that time, all bets are off. :D
You have no idea what he felt was a "full cleaning".

After all, we all know that POs are all liars. Unless you bought it from me, of course. :-\\\

.
 
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