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mnccnm
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« on: February 20, 2017, 09:56:32 AM » |
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Hello,
Just completed rebuilding all six carbs on my newly acquired 98 tourer. I counted the turns out on the low speed mixture screws when I disassembled and there was quite a difference between them. Some were as low as 2 turns out and some around 3, and one a little over 4. Should I duplicate these settings on re-assembly or set them all the same, like around 2 turns out?
Any advice here would be a great help.
Thanks
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Harryc
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« Reply #1 on: February 20, 2017, 10:38:55 AM » |
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I'd leave them like they were unless you plan to readjust them per the procedure in the tech manual. It's not uncommon for them to be set differently, even from the factory.
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98valk
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« Reply #2 on: February 20, 2017, 11:01:47 AM » |
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set all 2 1/2 turns then u need to sync the carbs. Digi-sync is the best to use.
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1998 Std/Tourer, 2007 DR200SE, 1981 CB900C 10speed
1973 Duster 340 4-speed rare A/C, 2001 F250 4x4 7.3L, 6sp
"Our Constitution was made only for a Moral and Religious people. It is wholly inadequate to the goverment of any other."
John Adams 10/11/1798
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Eric58701
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« Reply #3 on: February 20, 2017, 12:44:16 PM » |
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just curious, at what throttle position or is it rpm does the low speed jet stop its primary function?
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mnccnm
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« Reply #4 on: February 20, 2017, 01:14:08 PM » |
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set all 2 1/2 turns then u need to sync the carbs. Digi-sync is the best to use.
For now I am syncing the carbs on the bench, it might be a little bit before I can sync them on the bike. With this in mind, should I leave them as they were? Also, is this mix screw used when syncing the carbs? I was under the impression this was done using the throttle screws. |
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Blackduck
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« Reply #5 on: February 20, 2017, 01:30:43 PM » |
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As 98 said initial set around 2 1/2 out then tune as needed after you do a sync. May need to recheck the sync after sorting the mixtures. The link is for Factory Pro carb tuning, there is another link in the idle section that may help explain the setup. http://www.factorypro.com/tech/tech_tuning_procedures/tuning_carbtune,CV,lower_rpm_engines.htmlThe Honda method is explained in the service manual, not a 5 minute job. |
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2001 Standard, 78 Goldwing, VRCC 21411
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98valk
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« Reply #6 on: February 20, 2017, 02:56:05 PM » |
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set all 2 1/2 turns then u need to sync the carbs. Digi-sync is the best to use.
For now I am syncing the carbs on the bench, it might be a little bit before I can sync them on the bike. With this in mind, should I leave them as they were? Also, is this mix screw used when syncing the carbs? I was under the impression this was done using the throttle screws. there is only one throttle screw, which has the black plastic knob. the others are idle mixture screws and they control the pilot jets. |
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1998 Std/Tourer, 2007 DR200SE, 1981 CB900C 10speed
1973 Duster 340 4-speed rare A/C, 2001 F250 4x4 7.3L, 6sp
"Our Constitution was made only for a Moral and Religious people. It is wholly inadequate to the goverment of any other."
John Adams 10/11/1798
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98valk
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« Reply #7 on: February 20, 2017, 02:58:15 PM » |
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just curious, at what throttle position or is it rpm does the low speed jet stop its primary function?
The pilot jets mostly affect 0-1/4 throttle, but they also affect small throttle movement from 1/4-WOT. provides smoothness of throttle changes. |
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Logged
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1998 Std/Tourer, 2007 DR200SE, 1981 CB900C 10speed
1973 Duster 340 4-speed rare A/C, 2001 F250 4x4 7.3L, 6sp
"Our Constitution was made only for a Moral and Religious people. It is wholly inadequate to the goverment of any other."
John Adams 10/11/1798
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sandy
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« Reply #8 on: February 20, 2017, 06:50:19 PM » |
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The starting point for initial startup is 1 3/4 for 49 state bikes and 2 turns out for CA models. Fine tuning with syncing and exhaust temp measurements sometimes result in 2 - 2 1/2 turns for final settings.
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Paladin528
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« Reply #9 on: February 21, 2017, 11:39:04 AM » |
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The Manual for the I/S states 2 1/2 turn initial setting. Then follow the procedure. Generally they all end up around 2 1/2 anyway.
If you have had the carbs apart then start from scratch at the initial setting.
There are 6 pilot screws to adjust and once you have the carbs in the bike there are 5 adjustment screws for the throttle plates (sync screws).
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