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Starting Routine for M750 w/ Kehin FCR 39mm Falt Slide Carbs

Started by bluesman77, March 19, 2009, 03:41:28 PM

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bluesman77

March 19, 2009, 03:41:28 PM
HELP!I recently purchased a '97 M750 that has quite a few modifications including a set of the subject carbs. Those of you who use these, what have you found to be the best drill for starting cold and warm? I've tried twisting the grip (2) full strokes before hitting the magic button, get it to fire, but not light. I twist (1) more time between attempts until it runs. Should the carbs be completely shut when cranking and then turn the grip slightly when it fires up or is there another magical combination?

ducatiz

#1
March 19, 2009, 03:46:13 PM
i have the flatslides on a 900ss.

twisting the throttle doesn't help as they do not have an accelerator pump.

i use a spritz of starter fluid.  not too much, just enough to wet the slide.

takes a bit of cranking in cold weather. 
Check out my oil filter forensics thread!                     Offended? Click here
"Yelling out of cars, turning your speakers out the window to blast your music onto the street, setting off M-80 firecrackers, firing automatic weapons into the airâ€"these are all well and good. But none of them create a merry atmosphere of insouciance and bonhomie quite like a revving motorcycle.

bluesman77

#2
March 19, 2009, 04:19:57 PM
Hmmmmmmm......mine have an accelerator pump for sure. Incidentally - love your avatar and its sentiment.

ducatiz

#3
March 19, 2009, 05:09:39 PM
if they have an accelerator pump, then try 1-2 twists and hit the starter with the throttle closed.  i would experiment with 1, then 2 then 3 twists before starting and on up to see how many the bike "likes".. probably not more than 3-4 squirts.

i like the starter fluid method a lot.
Check out my oil filter forensics thread!                     Offended? Click here
"Yelling out of cars, turning your speakers out the window to blast your music onto the street, setting off M-80 firecrackers, firing automatic weapons into the airâ€"these are all well and good. But none of them create a merry atmosphere of insouciance and bonhomie quite like a revving motorcycle.

needtorque

#4
March 19, 2009, 05:15:54 PM
Just a suggestion for those who have this problem and live in cooler climates.  Wrap some heat tape around the carbs.  Home depot sell heat tape really cheap.  Basically it is just cord that is used to wrap around water pipes under a house to keep the pipes from freezing.  Wrap a little around the carbs and leave the plug in a fairly accessible place.  Plug it in for 5 min or so and it will likely start a bit easier.
Who insures the FDIC?

ducatiz

#5
March 19, 2009, 05:20:04 PM
Quote from: needtorque on March 19, 2009, 05:15:54 PM
Just a suggestion for those who have this problem and live in cooler climates.  Wrap some heat tape around the carbs.  Home depot sell heat tape really cheap.  Basically it is just cord that is used to wrap around water pipes under a house to keep the pipes from freezing.  Wrap a little around the carbs and leave the plug in a fairly accessible place.  Plug it in for 5 min or so and it will likely start a bit easier.

if you're going to do that, then put an oil heater in as well!

seems to me you would be begging for moisture problems by doing that..
Check out my oil filter forensics thread!                     Offended? Click here
"Yelling out of cars, turning your speakers out the window to blast your music onto the street, setting off M-80 firecrackers, firing automatic weapons into the airâ€"these are all well and good. But none of them create a merry atmosphere of insouciance and bonhomie quite like a revving motorcycle.

needtorque

#6
March 19, 2009, 05:30:12 PM
Should not be a problem.  the only way moisture can get in the carbs is if it were there already.  It would be a minimal amount and I bet the bike starts better with slightly warm carb then one at or near freezing.  The tape does not get really hot it would just raise the temp by maybe 10 degrees max.
Who insures the FDIC?

turbodude

#7
March 20, 2009, 02:15:11 PM
Buy some dyna coils.  Starting my fcr'd 944 used to be a real pain in the cold, now its not so bad.  Two 3/4 twists of the throttle and I crack the throttle a little while running the starter and it fires every time.  I hold the throttle at 2,000 rpm till the bike stabilizes.  It takes a little getting used to get the process down, but it shouldn't be too bad.

I would not use starter fluid in my bike on a regular basis as its really not that good for the engine.   Just a little is fine, but if you put too much in you can hear an audible ping. 

ducatiz

#8
March 20, 2009, 05:52:49 PM
i should have mentioned the dyna coils as well, i put a ca-cycleworks kit on my 900ss and the difference is noticeable.

however on very cold days (around 40 F) i still use the starter fluid.  just one spritz in each throat.  do not overdo it.
Check out my oil filter forensics thread!                     Offended? Click here
"Yelling out of cars, turning your speakers out the window to blast your music onto the street, setting off M-80 firecrackers, firing automatic weapons into the airâ€"these are all well and good. But none of them create a merry atmosphere of insouciance and bonhomie quite like a revving motorcycle.

cack

#9
March 20, 2009, 07:03:27 PM
BTW, change your plugs.  I found the Champions don't start as easy as the NGK I swapped out.

dlearl476

#10
March 21, 2009, 12:10:11 PM
Quote from: turbodude on March 20, 2009, 02:15:11 PM
Buy some dyna coils.  Starting my fcr'd 944 used to be a real pain in the cold, now its not so bad.  Two 3/4 twists of the throttle and I crack the throttle a little while running the starter and it fires every time.  I hold the throttle at 2,000 rpm till the bike stabilizes.  It takes a little getting used to get the process down, but it shouldn't be too bad.

 

Same issues here, and I've tried your method and it works above 60 degrees, but below that, it's a pregnant dog.  I'm not absolutely certain my jetting is perfect for the pods or that my battery/starter are A1 , but still.  Maybe I haven't experimented enough but often, even when I get the bike running (after 7-8 tries) sometimes when it's really cold I have to "idle" it at 3000-4000 to keep it running, which IMO is way worse than a squirt or two of starting fluid.  So much so that I'm considering using a TPO carb vent removal kit I didn't need to add a "starting circuit" to my bike to blast a bit of ether into the intake tracts.  (First I'll get a new battery and verify that all my grounds are corrosion free.)





QuoteI would not use starter fluid in my bike on a regular basis as its really not that good for the engine.   Just a little is fine, but if you put too much in you can hear an audible ping.

Do you have a source for that info?  I'm not asking to be a dick, but I've seen it several times now and I really don't understand the logic.  I used to work on construction vehicles that had ether starting systems built in and NFW would the motor start below 30Ëš without using it, liberally.  These are motors that regularly go 50,000 hours between rebuilds, if ever.  I could understand someone trying to get their motor to "run" on ether, but starting with it usually only takes a small squirt to light the fire.

ducatiz

#11
March 21, 2009, 01:04:49 PM
Quote from: dlearl476 on March 21, 2009, 12:10:11 PM
Do you have a source for that info?  I'm not asking to be a dick, but I've seen it several times now and I really don't understand the logic.  I used to work on construction vehicles that had ether starting systems built in and NFW would the motor start below 30Ëš without using it, liberally.  These are motors that regularly go 50,000 hours between rebuilds, if ever.  I could understand someone trying to get their motor to "run" on ether, but starting with it usually only takes a small squirt to light the fire.

it happens if you flood the carb with ether.

ether is about 1000x as combustible as gasoline and if you put too much into the carb, you'll get pre-detonation from the pressure.  but that's ONLY if you use too much.  if you use it correctly, you are just helping the gasoline combust, not taking over the process.
Check out my oil filter forensics thread!                     Offended? Click here
"Yelling out of cars, turning your speakers out the window to blast your music onto the street, setting off M-80 firecrackers, firing automatic weapons into the airâ€"these are all well and good. But none of them create a merry atmosphere of insouciance and bonhomie quite like a revving motorcycle.

needtorque

#12
March 21, 2009, 02:10:24 PM
I have seen several vehicles with plastic intakes literally blown to little bitty pieces from pre-detonation as a result of the owner trying to use ether to start the vehicle.  It does have a much lower ignition point and can cause serious pre-detonation if used in excess.

The motors that have a built in starting system for ether likely have a control feature which either changes the timing or severely limits  the amount of ether that is used. 
Who insures the FDIC?
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