entropy
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posted September 21, 2007 10:30 PM
 Edited By: entropy on 23 Sep 2007 08:26
brunette Barbie fixed the plug/piston "interference
they all look sorta like this
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Y2KZX12R
Needs a job
CompetitionCNC.com
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posted September 22, 2007 04:12 AM
Karl, how long were they in the engine?
Looks lean to me.
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psycho1122
Pro
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posted September 22, 2007 05:53 AM
+1
and +1 on the miles/hours.
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nox
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posted September 22, 2007 06:44 AM
Looks like they got a little hot........, maybe a little lean?
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Halvefast
Zone Head
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posted September 22, 2007 07:51 AM
Was that the Gremlin you were looking for?
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Two Wheel Werkz
Novice Class
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posted September 22, 2007 09:13 AM
yes, def. a lean condition
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buddy
Expert Class
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posted September 22, 2007 10:33 AM
Edited By: buddy on 22 Sep 2007 11:36
Gap looks a little close and the center electrode looks a little bent.
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aliveagain
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posted September 22, 2007 01:59 PM
threads are nice and clean,problem?
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SteddyTeddy
Pro
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posted September 22, 2007 02:23 PM
Are you spraying nitrous?
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TRNorBRN6001
Needs a job
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posted September 22, 2007 04:28 PM
yep, a real close gap! See what Noonan has to say on the best and easiest
method for dusting off the tops of those slugs.
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wolf racing
Expert Class
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posted September 22, 2007 04:33 PM
Hi nox.
What made you look at them. That's aways a good bit of info for when you're trying to work things out. Like, no real reason, there was a performance drop, there was a noise?
Look's big time lean. Personally, I'd be pulling the top off and looking at the pistons and chamber. Pistons for heat damage and combustion chamber for indication of lean.
I'm curious about the thread as well. bottom looks like it's been exposed to the chamber? Top is just way clean.
Cheers,
Wolf
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entropy
Moderator
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posted September 22, 2007 06:38 PM
brand new plugs, all 4 look like that or worse.
just put this latest "experimental" motor together, and it started popping under dyno load.
to make a very long story short, head is coming off tonight.
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johnnycheese
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posted September 22, 2007 08:26 PM
Gary's bike is up and running again (fouled plugs)wish you could have heard it Karl
His brothers is ready aswell.
Time for Cheese's
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entropy
Moderator
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posted September 22, 2007 09:25 PM
Edited By: entropy on 22 Sep 2007 22:31
JC:
Good on getting both Gary's and Robert's bikes making sweet music, sorry i had to blast back to Moo-City 
Yes indeed, time for ole coppertop to sing!!!
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entropy
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posted September 22, 2007 09:30 PM
and the prize goes to TimChin and JohnnyCheese 
Both weighed in with the suggestion that the pistons were hitting the plugs.
Just pulled the head and all 4 pistons show clear marks.
It ain't nuthing a big hammer and hacksaw cain't fix. 
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nox
Needs a job
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posted September 23, 2007 05:49 AM
lol
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entropy
Moderator
Posts: 8671
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posted September 23, 2007 07:39 AM
My daughter sent a brunette Barbie (BB) to help those 2 ditzy blonds in the garage.
BB insisted I take a couple pix so she could show off her designer safety glasses
It is back making noise this morning
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tcchin
Zone Head
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posted September 23, 2007 09:41 AM
So was it the ECU that was causing the misfire??
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entropy
Moderator
Posts: 8671
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posted September 23, 2007 10:35 AM
quote:
So was it the ECU that was causing the misfire??
don't know yet, but will find out this Fri when i go back to the dyno.
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johnnycheese
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posted September 23, 2007 11:43 AM
I know it was the plugs but I could be wrong
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aliveagain
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posted September 23, 2007 01:53 PM
cause I don't know any better,can those pistons still be reused?
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TRNorBRN6001
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posted September 23, 2007 04:49 PM
No problem for those beauties, just have the BB massage that out a little for a happy ending!
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ninja12
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posted September 23, 2007 05:14 PM
Edited By: ninja12 on 23 Sep 2007 18:18
quote:
cause I don't know any better,can those pistons still be reused?
No problem with reuse. If it were a nitrous motor a little massage on the sharp edges might be in order.
Karl, how far out the hole are those pistons?
Are you going to releave the piston or drop compression?
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entropy
Moderator
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posted September 23, 2007 09:41 PM
Edited By: entropy on 25 Sep 2007 02:18
G. & P.
correction, pistons are about flush with the block; .031 min quench height.
I took a dremel to those pistons sat night in a 10pm to 10am marathon. Added .030-.040" clearance under the plugs and smoothed some sharp edges. Bike is making good noise but dydno will tell...
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TRNorBRN6001
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posted September 24, 2007 04:55 AM
Glad to hear it Karl, I am sure you put BB to work while you rested!
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