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post #21 of 226 (permalink) Old 05-07-2019, 05:03 PM
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You do need balance gauges to set up on yours - the TuneECU provision only works on the 1050 models
Morgan Carbtune in UK (Belfast) does a really nice set if you end up buying some

Air volume is what controls the rpm - any additional air out-with the control system (i.e. the throttles themselves or the IACV valve) will have exactly the same effect as additional air through those devices themselves! - so that is why leaks through the IACV hoses will ALWAYS make it idle too high.

The idle speed is determined by two air paths - one through a very small opening angle of the throttles (they are not truly 'closed') and secondly through the IACV valve;
the former will be fixed and that is where the balance element comes in - each throttle 'closed' position needs to be set so each cylinder is receiving the same volume/mass of air (if they are not 'balanced' then each cylinder is attempting to run the crank at different speed and then the second part of the equation - the IACV (which operates on a closed loop system trying to set the idle speed to 1250 by adjusting the amount of air to each cylinder) gets confused as it is trying to react to each cylinder but is common manifold to all three!
Poor idle and stalling are most often associated with a poor balance condition on these bikes.

There is another setting that is used to help idle/off-idle condition called the idle fuel trim aka CO adjust - that enriches the fuel mass at idle/low rpm - but again, must realize that air is the PRIMARY mechanism for engine speed & even when lean, it should still be able to control the speed - so don't adjust that setting until you are confident you have fundamental idle control established and only then if you believe it is lean (that one should be only be adjusted by checking the CO content with exhaust analyzer)

And before you do any of that, ensure the TPS is adjusted/zero'd although again that will have more effect on fuel than air)
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post #22 of 226 (permalink) Old 05-12-2019, 05:53 AM Thread Starter
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Now that’s a lot of information for a novice to take in..got a throttle balance kit awaiting me to collect from post office..unfortunately it’s Sunday..
however I have just taken off tank and air filter in preparation to crack on with it and found two electrical connections that are not connected to anything that have been tie clipped to fuel rail ( any ideas people) ...plus IACV gasket as bit of a split.will order replacement soon as....
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post #23 of 226 (permalink) Old 05-12-2019, 07:26 AM
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Grey connector is for purge control valve - only fitted to US models, specifically California delivered bikes.

Can't help with the black connector. For the accessory socket perhaps. Anyone else know?

Last edited by Terry Colley; 05-12-2019 at 07:33 AM.
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post #24 of 226 (permalink) Old 05-12-2019, 11:43 AM Thread Starter
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Purge control valve eh...I have no idea how or why that is on it for...thanks for letting me know though...this bike gets more interesting all the time...
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post #25 of 226 (permalink) Old 05-12-2019, 12:40 PM
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It was easier to just make one wiring harness and have the connector dangling.
Charcoal canister emissions stuff.
While you are in that area replace those IACV lines with 6 or 7mm silicone ones as the rubber boots crack and will drive you crazy.
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post #26 of 226 (permalink) Old 05-12-2019, 04:45 PM Thread Starter
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Steve ford..I got a couple of metres of 6mm fuel pipe if that will do it..do I need to order new rubber boots as well then or will the fuel pipe just go on as is .....
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post #27 of 226 (permalink) Old 05-12-2019, 04:48 PM Thread Starter
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Its night time here so can’t go look and see what i actually need to do...ordered new IACV grommet/gasket earlier and will be here in 2/3 days...postage costs more than the thing itself...
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post #28 of 226 (permalink) Old 05-12-2019, 04:57 PM Thread Starter
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Oh and Decosse..I think she probably is running a bit rich and burning more fuel than she should as I don’t get a lot of mileage per tank...some of that may actually be my fault overtaking lorries and tractors and having to give extra revs to stop her stalling/cutting out...
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post #29 of 226 (permalink) Old 05-12-2019, 05:17 PM
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The silicone line just slips over the nipples.
The far left one on the IACV is a blank one, nothing connects to it.
Do them one at a time and make them the same length as the originals.
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post #30 of 226 (permalink) Old 05-13-2019, 02:08 AM
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Connectors - both emissions related; one CA-only fuel vapour charcoal canister purge valve; the other is for secondary air injection (not any specific market - seems to be or not to be somewhat randomly in different markets) - for improving exhaust emissions.
As suggested, the harness is common to all markets and in those with those particular features not employed, simply left unconnected.
This (what are these particular connectors) is THE most frequently asked question in the forums.

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... make them the same length as the originals.
Length would not make any difference to performance but makes good sense regarding physical layout consistency
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