99 SRAD 600 intake problems

[DoGbOt]

hi there, im new here but have a slight weeezie problem with my 6oo srad, when it rains or is cold & damp my bike misses untill about 7grand, when it moves off fine, now i usually like bouncing revs to the red but in the wet winter in high traffic this poses a problem! any suggestions??


Thanks

[DoodleBug]

Does it happen after you have ridden it for a while, or straight away?

[DoGbOt]

its uncertain when it will attack, usually happens about the time the engine has warmed up but it comes on and goes at random intervals & it might dissapear for a few days too!

i do have a theory, dont laugh but.........
the airbox cushions dont completly meet the frame openings smartly all the way round & i think that this combined with the warm air (from engine below) & the damp cold air from the front mixing in the airbox is causing my problem, either that or the fact its not meeting the frame is causing a leak effect on the intake system??

[kasandrich]

I think its more likely you have a dodgy spark plug, or a dodgy HT lead.

[DoGbOt]

hmm, been there done that, new plugs & replacement coil packs, (which where extreemly expensive!(coil packs not plugs)) but all to no avail!

sorry

[MICKTLS]

Hi Bike basher i seem to think you have a poss case of servere carb icing or at least the symptoms you describe are just the same its the wind chill that freezes the mixture so much it wont ignite ............if you stop and let the bike idle for a while does it then return to normal ? if it does then its a strong possibility whats happening ..........this can happen even at temps of upto 8 or 10 degrees air temp that is

[Lateshift]

I agree entirely with Mick, the SRAD by virtue of its engine and air intake system suffered badly with this (as did some of the Kwaks although Kawasaki refused to admit it :D ). To combat this Suzuki themselves even brought out a plate that inserts into your air intakes to restrict the volume of air going in slightly (this allowed the smaller volume of air to warm a bit first before going into the carbs) however they are rare as hens teeth :D

Try a pair of socks ;) :D (no joke ;) )

Having had a 750SRAD die on me due to this only to have it start immediately after i pulled over its nothing more than a lack of a carb warmer or inadequate carb heating i should say :)

[DoodleBug]

Thats where I was going, only I re-read the initial post and it is unclear as to wether it just happens in winter, so kept my schnozzer out!

[DoGbOt]

Hi guys, yes it still happens in temps of 8- 10 degrees as it did it this morning & it werent exactly cold but there was a lot of spray in the air & it was drizzling, when i stop the bike will idle but when left for a few minutes will pull away fine, so this icing of the mixture sounds feasible! many thanks will report back!.

O an i couldnt tel you if it happens out of winter as i got thebike mid november sorry!

[Lateshift]

Its not the mixture icing directly, in a roundabout way the actual air temp whilst relevant is the cause of it, however not the temperature you feel at 8-10c ;)

When air is being sucked into the airbox as you speed along merrily, the air outside may be 8-10 however due to windchill the air going in is significantly colder, this is a good thing normally because fuel molecules suspend better in cold dense air (i.e. the contents of a pressurised airbox)

With all that air being forced in and then being sucked into the carbs it lowers the temperature of the jets and the moisture in the air is able to freeze slightly, this obviously blocks the jets momentarily which is why it either kills the fuel supply completely or makes the engine stutter.

What happens next is that you pull over, the heat from the engine quickly thaws what little ice it took to cause it and your off wondering what exactly went wrong, and so on and so forth :D

Most carb icing actually occurs on this sort of day, plenty of moisture in the air and just cold enough for the air to drop in temperature when being forced into the airbox at speed.

As i said a pair of socks, strange as it may seem :D tends to slow the air going in enough to see if it helps it, later bikes had carb heaters on in the way of a line of coolant being passed through the carbs to keep them at a nice temperature (it stopped the jets getting too cold), but not all bikes came equipped with them.

Here endeth the lesson :D

[DoGbOt]

Ta, Boys i shall go an thieve a pair of the missus socks and try them out!!

No!! on the air intakes not on me!! (Just Before we get that 1 going!!)

& the fact of the missus socks being used well why ruin a pair of mine eh!!

LoL!!:grin2

[Lateshift]

Just remember white socks arent in anymore ;) :D

nor are paisley for that matter! :D

[DoGbOt]

Na i was thinking a nice pair of multicolour ones:laugh2

[DoodleBug]

OMG Lateshift has come over all "Guvnor" on us.








*waits for someone to smut that remark up*

[Ride-or-die]

yes socks do the job i used to have the same problem with my srad

[crescent750]

I used to have the same kinda problem when i had a 600 SRAD.
I put somethin called SILKOLENE PRO FST in with the petrol and it never happened again. A capful of this stuff in the tank cured all my carb iceing problems...
Trouble was i could never find it in a shop, so always had to buy it online...

A post worth reading:-

http://www.hondaownersclub.co.uk/forum/forum_posts.asp?TID=31058&get=last

[stu600cc]

Yep carb icing

The old mans srad 600 done it

Dont think theres much you can do

i think theres a feul additive that will help cant remember the name

[Lateshift]

I have some FST sat here which i have used in the past, although i cant say if it worked or not because after putting it in, it didnt get that cold again :D

But it does stop the carbs iceing and also stops them gumming up if the fuel is left in for a while too :)

[DoodleBug]

I too have a bottle lying around and absolutely swear by it. My old ZZR was terrible for icing, put a capful in every day and it never, ever happens.

Pro FST all the way. It also gives the carb internals a good clear out of any gum that may have built up, well worth a try.