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plugs
http://kawi2strokes.com/forum/viewtopic.php?f=14&t=3677		 Page 1 of 1
Author:  greens8 [ Tue Jun 26, 2012 4:16 am ]
Post subject:  plugs
Hi guys. Have a bit of a problem with plugs fouling. Been using Ngk b9hs or b9hs10, but seem to foul often. Actually only the middle and left. Right burns nice and brown. Does anybody use the Buhx or am I better off using the above plugs? The carb settings are identical for all three, believe me I`ve checked and rechecked. Could the crank seals be leaking excess oil into the casing on the two cylinders in question ? For anybody who remembers my post on the use of 3 into 1, I fitted it (was a b*****d to fit, had to remove the studs and shoehorn it on), and seems to go well except I can`t open it up until I have run in the middle cylinder but sounds great. Not like any sound I`ve heard before. People are already looking for it before I even round the corner. Something different anyway. Steve.
Author:  mraxl [ Tue Jun 26, 2012 5:25 am ]
Post subject:  Re: plugs
Use B9HS.
It is possible that your choice of oil could aggravate the problem.
Crank seals would have nothing to do with it.
Author:  battleax [ Tue Jun 26, 2012 8:16 am ]
Post subject:  Re: plugs
What bike? Certain H1s have a less than optimum ignition design, with a weak spark you will have more plug fouling. My H1A is so over oiled with the factory pump settings is is ridiculous. If it were not for the strong early CDI ignition, I know I would be changing a lot of plugs.
Author:  Looney Cylinders [ Tue Jun 26, 2012 10:39 am ]
Post subject:  Re: plugs
battleax wrote:
What bike? Certain H1s have a less than optimum ignition design, with a weak spark you will have more plug fouling. My H1A is so over oiled with the factory pump settings is is ridiculous. If it were not for the strong early CDI ignition, I know I would be changing a lot of plugs.



Are you aware it is permissible to align the dot on the oil pump lever with the line at WFO throttle on the H1A? This will yield around 500 miles to the quart oil consumption, which is more in line with the typical later triple. Greens is running late h1 CDI.

Greens, Does your bike sit for several days between being run? I ask because seeping check valves will allow excess oil into the crankcases and must be cleared with a WOT run. Oil pumps set too high and/or too rich a fuel/air mixture also will aggravate your plug fouling issue.

J
Author:  smoff83 [ Tue Jun 26, 2012 7:26 pm ]
Post subject:  Re: plugs
this happened to me - just what I found:
2 of my 3 floats s-l-o-w-l-y leaked gas into them. It was driving me nuts. I guess on the same wavelength, check float heights (I know, amateur stuff)

or listen to previous (and post) postings from more experienced guys
Author:  greens8 [ Wed Jun 27, 2012 12:53 am ]
Post subject:  Re: plugs
Ok thanks for all that. Sorry, yes it is the late H1 with a new combined A and B cdi unit. Good spark. Can`t wot yet as new top end on middle cylinder. I had missed a washer on the middle oil banjo last time which missaligned the oil feed to the cyl base and starved it. Another lesson learned. Floats are precisely 25 mm and all other carb specs are as per manual. Just got advice from mechanic friend that shouldn`t clean plugs, just throw them out and buy new ones, which is what I`ll do but they are not readily available so a bit of a hassle. Glad to have it going again but now of course it won`t stop raining. I might try a different oil.
Author:  Jim [ Wed Jun 27, 2012 9:44 am ]
Post subject:  Re: plugs
There are different opinions about plugs. I guess if I were going for a dyno run, or to the drag strip, I'd put a brand new set in, but for everyday use, I sandblast them with a little J.C. Whitney spark plug blaster, blow/poke out all the sand that gets stuck around the porcelain, file the center electrode square, re-gap, and put them back in. When things are right, you don't need to mess with them very often though. I don't think I've done anything to mine for a thousand miles or so.
Author:  usernameandpassword [ Sat Jun 30, 2012 7:03 pm ]
Post subject:  Re: plugs
smoff83 wrote:
this happened to me - just what I found:
2 of my 3 floats s-l-o-w-l-y leaked gas into them. It was driving me nuts. I guess on the same wavelength, check float heights (I know, amateur stuff)

or listen to previous (and post) postings from more experienced guys


Always shake em whenever you open the carb. I went through 2 last year. Hairline cracks. :roll:
Author:  Groink [ Fri Aug 10, 2012 10:49 pm ]
Post subject:  Re: plugs
Guys, I am a new 72 H2 owner and first time neighborhood hooligan this evening after installing Jim's CDI set! Have been waiting for that 35 years...
Got the carbs leak, ignition failure, the oil in the pipes, petcock leaks, etc... I feel young again :e11 !!
Re sparks on cylinder heads I have had that in two previous occasions and fixed it by changing the wire from the ignition coil to spark plug. They tend to lose their insulating capacity after a while (mostly due to heat) and would spark on anything nearby, even with a much larger gap than a spark plug. This solved my problem in the past and it is cheap.
Author:  Scully [ Sun Aug 12, 2012 1:11 am ]
Post subject:  Re: plugs
replacement floats are inexpensive.......if they look crappy, replace them, adjust properly and be happy :)

Get some of Jims ignition units...... and good set of coils.....:)
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