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Post by nomoreheros on Feb 6, 2022 18:26:20 GMT 1
Ok guys gonna strip my 31k carbs this week...can anyone give me any tips on how to measure the float height etc please.
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Post by muttsnuts on Feb 6, 2022 19:22:35 GMT 1
use and engineers rule, that's what I use, has a sliding bar on it
21mm ± 1mm with no gasket
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Post by stusco on Feb 6, 2022 20:04:17 GMT 1
I use a depth gauge sounds like the same thing
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Post by stusco on Feb 6, 2022 20:16:53 GMT 1
 I use a depth gauge sounds like the same thing |
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Post by nomoreheros on Feb 8, 2022 17:36:18 GMT 1
Is this the right idea guys?... showing approx 20mm so need to go a bit more??  |
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Post by midlifecrisisrd on Feb 8, 2022 17:45:21 GMT 1
You need to remove the gasket too so probably good
Steve
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Post by vectisitch on Feb 8, 2022 17:46:12 GMT 1
Is this the right idea guys?... showing approx 20mm so need to go a bit more?? Looks to me like the gasket is still on? Measure without the gasket fitted |
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Post by nomoreheros on Feb 8, 2022 18:16:50 GMT 1
Well I've put carbs back together and fitted them to the bike and guess what?...it won't start 😞
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Post by oldelsieboy on Feb 8, 2022 18:22:58 GMT 1
Well I've put carbs back together and fitted them to the bike and guess what?...it won't start 😞 Maybe you've mixed up the float bowls. OEB |
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Post by freddie19 on Feb 8, 2022 18:26:37 GMT 1
And... you need to tilt the carb at an angle so the float tang is just touching and not compressing the needle valve spring! 😁👍
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Post by nomoreheros on Feb 8, 2022 18:29:06 GMT 1
Well I've put carbs back together and fitted them to the bike and guess what?...it won't start 😞 Maybe you've mixed up the float bowls. OEB Is this the choke side?  |
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Post by jon on Feb 8, 2022 18:34:51 GMT 1
The measurement is to be made just as the valve starts to close.
With the carbs upside down as shown it will be wrong.
Some people say rotate the carb from vertical until the slide just starts to close without depressing the pin on the valve (LC not YPVS) around 45 - 60 degrees. I prefer to attach a pipe to the overflow and blow through it, closing the float until it just starts to stop the airflow.
I’m not really surprised it doesn’t start like that.
Jon
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Post by shaunthe2nd on Feb 8, 2022 18:36:55 GMT 1
We assume it ran before you stripped the carbs.
If you re-balanced the carbs using the pips in the sliders then the sliders will be correct, so quite likely float bowls as OEB says.
Did you use original brassware or have you fitted cheap copy parts?
Assuming its a stock bike (no porting, standard exhausts, standard air filter) then using the standard carb settings is usually a good starting point which you can tweak after some road trials.
Obvious question - you are getting spark but no fuel to the plugs?
31k CDI's are unreliable so just asking.
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Post by oldelsieboy on Feb 8, 2022 19:03:43 GMT 1
Maybe you've mixed up the float bowls. OEB Is this the choke side? Looks like it. OEB |
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Post by nomoreheros on Feb 8, 2022 20:16:10 GMT 1
Is this the choke side? Looks like it. OEB yes getting a spark and plugs are wet.. Bike as been running after rebuild but not at the moment |
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Post by 29davyt on Feb 8, 2022 20:26:22 GMT 1
Stick some new plugs in, you may of flooded it, also floats need setting with carb body tilted not inverted as others have said.
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Post by muttsnuts on Feb 8, 2022 20:45:50 GMT 1
are you trying it with the tank off ?, if so have you blocked off the vacuum take off pipe on the RHS carb, if not it won't start, also I assume you have connected the choke tube between the 2 carbs ?
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Post by nomoreheros on Feb 8, 2022 21:01:54 GMT 1
are you trying it with the tank off ?, if so have you blocked off the vacuum take off pipe on the RHS carb, if not it won't start, also I assume you have connected the choke tube between the 2 carbs ? Yes I've done both Dave |
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Post by nomoreheros on Feb 9, 2022 15:41:49 GMT 1
Day 2 today...carbs stripped again...float bowls height showing 24 mm on right hand carb so reduced it to 22mm without gasket and carb on a tilt...wish me luck...never failed on getting a bike to run
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Post by nomoreheros on Feb 9, 2022 15:55:01 GMT 1
👍  |
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Post by nomoreheros on Feb 9, 2022 16:53:25 GMT 1
Well I've got it running 😁... petrol pissing out choke side carb overflow though....also when it's ticking over and you start revving it.. it takes a few revs to get it to liven up
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Post by steven on Feb 9, 2022 17:40:24 GMT 1
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Post by nomoreheros on Feb 9, 2022 17:43:03 GMT 1
Thanks for that Steven...looks very complicated 🤔 |
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Post by steven on Feb 9, 2022 17:57:30 GMT 1
Hi,
Yes, its a bit more complicated ,compared to using a steel rule.
I just hate pulling carbs on and of umpteen times. Doing it this way meant that I could fit them with confidence and be fairly sure that the float heights were accurate and that nothing was going to leak, as they had been checked with fuel in them using the clear line method, after setting them with the wee setting tool.
As I said above, Elsie is worth it, well I think so anyway. :-)
Steven.
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Post by giggsey999 on Feb 10, 2022 20:49:01 GMT 1
👍 That's 90 degrees, should be 45. |
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