Opinions!!

[Chris Canning]

Here's an odd u'n my Tiger over the years(nearly 40,000 miles) has run like a good'un last year in Spain didn't run all that well in towns(in fact it's never been very good) when hot and I put that down to a Reg/Rec start from cold runs perfect will settle down within a couple of minutes and tick over at 1200 revs out on the open road runs better than ever in fact coming back from Portsmouth last night beat the record 169 miles in an hour and 50 minutes but ride into a town/village and the moment the temp gauge starts to rise the tick over is all over the place??.

Just gone into the garage started bang on the button and ticked over without a care in the world!!!

[Bixxer Bob]

Chris,  when it's cold the ECU uses a table that is the equivalent of using a choke on a carburettor.  Depending on the temp of the engine it enrichens the mixture over the whole rev range, gradually reducing the amount as the engine warms until it reaches normal temperature.  More importantly, it can't go into closed loop until it reaches working temperature.  Once it's hot, closed loop starts to work and that uses the IACV to control the tickover, except that  - as we all  know - the IACV isn't very good at it, hence your crappy tickover once it's warm.

[rf9rider]

No electronics expert, but is there a way to "fool" the ECU into thinking the bike is running cool, eliminating the running rough problem?

[Chris Canning]

Cheers B

The annoying part I have to ride bloody miles to replicate it!! but there's all sorts of bits and bobs that need sorting so it'll go on the list what's the retail on an IACV.

[metalguru]

Would be inclined to set the fan temp down to 94C and idle speed at +94C to 1250 rpm. 
Makes things more comfy for rider and bike around town as rider only gets roasted by 94C instead of 104C
Clean and lube IACV or selftest.

[iansoady]

No electronics expert, but is there a way to "fool" the ECU into thinking the bike is running cool, eliminating the running rough problem?

Probably not*, although there is a way to stop it going into closed loop.

*and it would probably screw up the fuelling elsewhere.

[Chris Canning]

I've been that route with my XT660 and there's an option for the K1200 as well and in all honesty it's a bodge,over the years within reason I've been happy the way it's run and blimey it's had a hard life travelling Europe in a lot of heat so I'll put a new IACV on and see how we go,as I said in the other post there's allsorts of bits and bobs need doing over the winter and regardless of if I/we buy a replacement the Tiger won't be going anywhere my wife has already informed me of that  :icon_wink:

[Bixxer Bob]

IACV is about £70 if I remember rightly Chris;  I don't think you need one so it would be interesting to see if it helps.   

Edit:  While you're in there, think about doing an air leak check on the IACV pipes, the IACV gasket and the throttle body gasket.

[Chris Canning]

Bought the lot including the pipes I've had my monies worth out of it and I'm not pissing about trying to save a couple of quid.

Come to think of it tick over went down hill when I binned in NI a couple of years ago but as I rarely use the bike in the UK and mostly on the open road it's not like a major issue just a pain in the ass!!.

[Chris Canning]

Parts turned up today the Stepper motor has seen better days that's for sure 

[Chris Canning]

Blimey come to try the new stepper motor for fit spot on the old one is a like a spoon in a tea cup by comparison.

[Chris Canning]

Despite mine running great from cold put a carb tune on and 3 is out of sync drop it to 1 and 2 and it won't tick over,1 is too low that tick over screw looks well locktited to me  :icon_wink: any used anything else apart from a short allen key.

[John Stenhouse]

That sounds as though it's trimmed itself to the old stepper.

[Bixxer Bob]

Despite mine running great from cold put a carb tune on and 3 is out of sync drop it to 1 and 2 and it won't tick over,1 is too low that tick over screw looks well locktited to me  :icon_wink: any used anything else apart from a short allen key.

The original adjuster screws are Phillips so if you have allen bolts someone made a sensible upgrade. 

Need something like this maybe?

http://www.ebay.co.uk/itm/Bondhus-Hexagon-Hex-Allen-Key-T-Handle-XL-300mm-12-Extra-Long-3mm-4mm-5mm-8mm-/400474572403?pt=UK_Hand_Tools_Equipment&var=&hash=item5d3e250673

[Chris Canning]

I'm on about THE tickover adjuster their's only one for the lot,as I said in the other post 1 is too low,John may have a point but it's an interesting learning curve,but having had 13 years of good running I've a feeling that this is the slippery slope.

If I drop 2/3 down to 1 it won't tick over