XS1100 AUSTRALIA
XS1100 Topics => Workshop => Topic started by: retro on February 16, 2016, 08:34:17 PM
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Dear Brains Trust,
Help Needed - My 1980/81 RH is fouling the No 2 spark plug.
The bike was not running when brought from Melbourne. I have put new intake rubbers on.
When putting kit thru carbies, I broke a post on no 2 carbie & Eddy helped out with another carbie. I have checked the float heights and they are all good.
If you let it idle the no 2 pipe does not get hot, but when you take it for a ride and get the revs up the pipe starts to warm up.
I have tried changing the plug leads and there was no change.
The no 2 plug looks and smells like it is fuel that is fouling, not oil. Also left hand pipe is very wet.
Thanks Tony
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Have you put brand spanking new plugs in?
Checked the connections at the coil and TCI.
Change the TCI with a known good unit.
Check pick up wires as well.
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have you got spark on 2?
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Hi
Yes have spark until plug fouls
replaced all four plugs three times
have checked all connections
Would there be a reason for it to spark when
the spark plug is resting on the side of the cylinder
but when you put it back in it does not fire until you are high
in the rev range
I don't know if that is happening just trying to think of reasons
why it is doing it
Just trying to figure out if it is spark or fuel
Tony
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I assume the spark you see when resting is only at idle or low and briefly held revs....as opposed to throttle held open for a sustained period when riding.
It would point to electrical or mechanical issues rather than fuel..as you say is getting wet and fouled.
You don t mention if you have thoroughly checked the pick up wires ....both with a pull test and also with continuity to the TCI box.
Also not confirmed if you have swapped out the TCI for a known working unit.
Has or was it running ok before you swapped the carby?
Have you got your hi tension leads and caps on 2 and 3 on the correct spark plugs and wiring colors to the correct coils?
What have you done recently that you have nt mentioned so far?
Is the vac advance connected to the correct carb?
Are you sure float levels and assembly are faultless when reassembling the replacement carby?
Is the choke working mechanically on the 2 carb and closing off ?
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Haven't swapped the TCI unit for a known working one.
Tony we can do the checks this Saturday before or after the auction at Old Gold. I'll bring the working parts to eliminate yours.
The engine is running heaps better since the carby swap although I only bench tested them.
So far.
1. Put a kit through the carbys and swapped out #2 for one with unsnapped posts.
2. The carbs were then balanced with the carbi-tune and the air mixture was set using the colour tune.
3. Vac advance was incorrectly connected and is now on the carby and not the manifold.
4. will need to check the float levels. How would this foul the plug? (Thanks Andy for the You Tube video)
5. Choke IS working on #2
6. swapped out the 4-1 with a 4-2 from a Special (Mega improvement) got rid of the flat spot.
To do
1. check the #2 HT lead
2. check with a known working coil.
3. check with a new Cap.
A busy Saturday Tony.
At this rate Bryan will have his Mod done before the RH lives.
Eddy
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Considering what you say regarding it s only #2 giving the problem .....check valve shim clearance .
Could the carby that Eddy gave you be jetted differently ...have you checked needle and seat circlip position?
Check float level ...with clear tube onto float bowl drain outlet method.
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2 C
Sucking air check for vacuum leak around manifold to engine + manifold to carby might have picked up edge when forcing carbies on if got standard air box.
also back to basics compression test :o
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Sounds like a lemon mate, I'll give you $100 for it.... ;D
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When life gives you lemons you make lemonade
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I think the big B has made a low offer because I will come and pick it up for $101.
Just fooling around but Who ever is out there I need another bike at a great price to pull the DJP to keep the ONE who must be OBEYED with me on short trips with the Dish Licker
Life would be so simple if we did not Love :-*
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Hey chooksta,
Define "a great price"
If around $2k is a great price then there are a couple of bikes out there. Well there was and they may still be available.
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No i need a blind person selling their husband's Bike :-*
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Hey....no hijackin this thread ....i get confused really easy ;D
Retro.....Eddy....updates are a wonderful thang !
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Sorry
I confuse most people I come into contact with eventually. :-\
Is the problem found :(
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Hahaha.....its all good.
Always wanted to do the " Hahaha" thing as well.....lols are so yesterdiddy.
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Was on the blower with the barefoot mechanic trying for a magic fix. Thanks Steppers for the sound advice.
Tried a proven black box.......no difference
Tried a proven coil..........no difference.
played with the carbs........ Reset the circlip to the middle notch.
An appreciable difference with Tony laying a shed load of rubber down Carrington Rd.
Rode the 20 odd Kay's to my place. At around the half way mark, a puff of black smoke out of the rhs pipe, and running on 3 again.
Getting lost for ideas.
Will try a bank of proven carbs from my old faithful.
Eddy
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What you ve done so far is good..... in narrowing down the likely suspects.
Don t get disheartened .....Have you checked the diaphragm in that carby?
Is the slide correctly aligned and moving freely...... have you changed the hi tens lead as well as cap and plug all at the same time?
I m assuming the carb isn t flooding ..when the bike is turned off.....other than the excessive wetting of exhaust and plug you ve mentioned when riding and checking afterwards.
To be isolated to one carb only ...generally would eliminate any part of the electrical that serves to fire 2 pots at once that they are assigned to...ie pick up coil.....TCI.....coil ....general wiring.
Has the head been helicoiled on that plug and possibly had too much Loctite used....maybe partially insulating the plug from ground?
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Remove the spark plug and if you have a multimeter test between the inside thread of the spark plug hole with the other lead to a clean ground point either on the frame or motor.
Check using resistance and continuity settings.
Visually check the thread to see if it s relatively clean.
Go to your local auto shop and buy a plug tap to suit the spark plug thread...run it through the thread to clean it up....being careful not to hit the piston.
But DO check to make sure there isn t a hellicoil thread been inserted that may have an excess of Loctite on it.
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Problem solved ...........I did not screw the pilot jet all the way in.
thanks Tony
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sometimes the easiest fix is the hardest to find, well done, see you with bells on at the rally.
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[quote author=excess.11
What have you done recently that you have nt mentioned so far?
Is the vac advance connected to the correct carb?
Are you sure float levels and assembly are faultless when reassembling the replacement carby?
Is the choke working mechanically on the 2 carb and closing off ?
[/quote]
::)
Had to be one of those options.....not much else to cover.
Well done on the result. ;)