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Old Yesterday, 08:53 AM   #41
Onekallo
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Almost there. Had them set WAY too high.
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Old Yesterday, 11:33 AM   #42
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MOTY - 2018, MOTM - Nov '17
Nope, not too high, just about perfect.


Like this:


Now this is too high:



Float-height shouldn't matter one bit when pilot-screws are all way in. ALL petrol flow should be stopped in that position. Fact that yours will start and run with screws all way in shows something's wrong internally.
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Old Yesterday, 12:20 PM   #43
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MOTM - Jun '18, Oct '16
Quote:
Originally Posted by DannoXYZ View Post
(SNIP)

Float-height shouldn't matter one bit when pilot-screws are all way in. ALL petrol flow should be stopped in that position. Fact that yours will start and run with screws all way in shows something's wrong internally.
As Danno said - something isn't assembled or adjusted correctly.

Either you are missing the "collar"/Needle Jet or the Jet Needles are not sitting in the slides correctly and are being held out of the Main Jet when they should not be. Not sure exactly how the Enrichener Circuit works, but that could be involved as well.

Fuel is being dumped in from somewhere else besides the Idle Circuit.

Any other ideas anyone?
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Old Yesterday, 01:11 PM   #44
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MOTM - Nov '18, Mar '17
"Had them set WAY too high."

Note the use of the word "had". Some clarity needed...OP is the pic taken AFTER correction? Those levels are fine.

Jeez, some o' those pics look awful familiar, @DannoXYZ

OP how about a pic of both carbs looking inward from the air filter side, eh? Slides, needles intact.
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Old Yesterday, 02:23 PM   #45
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Quote:
Originally Posted by jkv45 View Post
"collar"
You mean someone who rebuild the carbs possible lost those buggers ?

It's very easy, I remember I got those sliding out on me when I did not expect them but luckily I had a clean table with some fabric on it so they just stayed on my table but I see how those can be easily lost and the person not even noticing it.
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Old Yesterday, 03:08 PM   #46
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MOTM - Nov '18, Mar '17
standard procedure should include accounting for presence of *every* single part during careful assembly process.
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Old Yesterday, 07:23 PM   #47
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Yes, they WERE way too high. Ended up leaving them as they are in the picture attached.

Definitely an improvement on cold start.

Added enrichener as you all had suggested. Easily able to control the RPM. Had to go straight home after work so I didn’t get a chance to fully warm the bike and adjust mixture screws.

When I had them off today to set the fuel level I pulled the slides, needles, and made sure all jets and passageways were clear and to spec. All washers and spacers present. Everything working smooth.

I set mixture screws at 2.5 turns when I had them all apart as well.

Hoping to get out for a ride on Wednesday, get the bike fully warmed up, and dial it all the way in.


If it is idling smooth at 1300+/- after warmed up, then I will adjust mixture to the happy ratio between hanging up with a throttle blip vs dying below 1300+/- after the blip; correct?
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Old Today, 06:18 AM   #48
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MOTM - Jun '18, Oct '16
Check the sync as well.
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Old Today, 06:24 AM   #49
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MOTM - Jun '18, Oct '16
Quote:
Originally Posted by Onekallo View Post
(SNIP)
If it is idling smooth at 1300+/- after warmed up, then I will adjust mixture to the happy ratio between hanging up with a throttle blip vs dying below 1300+/- after the blip; correct?
Not really.

After warm-up and checking sync, adjust the Idle Mixture Screws to get the highest RPMs, then go back and adjust the idle speed to 1300. It might be a good idea to go back and recheck the sync after making the initial adjustment. If a change is needed, go back and readjust the mixture screws again.

I like to make it about 1/8 turn richer (out) than the highest RPM to get a smoother transition, but for starters just get the highest.

Temperature changes, and the change in fuel blends that go with it, will alter the idle speed and mixture, so the idle mixture adjustment is something that does change at times.
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Old Today, 09:45 AM   #50
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Quote:
Originally Posted by jkv45 View Post
After warm-up and checking sync, adjust the Idle Mixture Screws to get the highest RPMs, then go back and adjust the idle speed to 1300..
Ok great: and as previously mentioned that "highest rpm" setting is 1500-1800 rpm where it will run smooth, re check sync, and then adjust down to 1300ish
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Old Today, 12:26 PM   #51
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MOTY - 2018, MOTM - Nov '17
Quote:
Originally Posted by Onekallo View Post
Ok great: and as previously mentioned that "highest rpm" setting is 1500-1800 rpm where it will run smooth, re check sync, and then adjust down to 1300ish
Note that this is 2 separate adjustments.

1. "highest idle" mixture setting will have any randomly variable RPM depending upon what idle-speed screw is set to. Ignore actual RPM when making this adjustment. Just set mixture-screws to "highest idle" speed, whatever that may be. Then add 1/8th turn.

2. repeat for other carb.

3. THEN, FINALLY, make final idle-speed setting to ~1300 with idle-screw.

4. Use choke for cold-starts and adjust choke as necessary to change idling speed as bike warms up.


Due to your short commute, try getting in at least one long ride during week. Fully warming-up is important to boil off water condensation from crankcase and oil.
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Old Today, 01:29 PM   #52
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Quote:
Originally Posted by DannoXYZ View Post
Note that this is 2 separate adjustments.

1. "highest idle" mixture setting will have any randomly variable RPM depending upon what idle-speed screw is set to. Ignore actual RPM
So how would you describe highest idle if it is not RPM related?

Excuse my ignorance, as I assumed highest idle meant highest idle rpm
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Old Today, 01:44 PM   #53
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MOTY - 2018, MOTM - Nov '17
Quote:
Originally Posted by Onekallo View Post
So how about you describe highest idle if it is not RPM related?

Excuse my ignorance, as I assumed highest idle meant highest idle rpm
Perhaps I should only use word "idle" when it relates to "idle-speed screw". Yes, max RPM, when adjusting mixture-screws. But actual RPM number is not relevant because we don't know what setting of your idle-screw is. When fully warmed up, idle-speed can be 1300 rpms, or 1500 rpms or 2000 rpms. Actual number is not relevant when starting this adjustment, only at end.

1. first, you adjust mixture-screws to give highest-RPM without touching idle screw. So you may start at 1478 rpms, then adjust one mixture-screw and it will vary from 1435 to 1505 rpms. Fiddle to get 1505rpms. Then add 1/8th turn.

2. Then do other carb's mixture-screw and you may have range from 1505 to 1561rpms. Highest speed achieved is 1561 rpms. Then give it 1/8th turn more.

3. Now, finally turn idle-screw adjustment to give 1300 rpms idle-speed.
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