a recent adventure

alex.s · February 19th, 2013, 10:08 AM

@Racer x - what do you think about this next photo?

looks like piston slapping the head right? we took it apart to examine a light tick when warm and found that.. journal bearings weren't bad enough to feel it. had plenty of power. cleaned everything up reassembled and put different oil in and the tick is basically gone unless you are listening with the stethoscope

Racer x · February 19th, 2013, 11:39 AM

Looks like the flame front over the valve reliefs. Is there a mark on the head. There should be a large gap between the top of the piston and head.

choneofakind · February 19th, 2013, 12:08 PM

An egg carton! Brilliant!

alex.s · February 19th, 2013, 12:28 PM

Quote:

Originally Posted by Racer x

Looks like the flame front over the valve reliefs. Is there a mark on the head. There should be a large gap between the top of the piston and head.

yeah the head looked fine thats why i'm confused. have you ever seen a piston with a gap in the carbon build up like that?

Racer x · February 19th, 2013, 04:25 PM

ya it is from riding around rich then for some reason it leaned out and took the carbon off. How are the valves on that side?

alex.s · February 19th, 2013, 04:45 PM

valves and guides looked perfect actually, seated well, no damage on the valves themselves, and the length of the valve rods were clean and shiny and didn't have any scaring. all valves vs. guides were solid and seemed to be in good shape. intake valves looked dark brown... maybe a little too dark. exhausts looked light tan, perfect color though. only 'odd' thing was a little extra carbon build up on one side of the intake and not so much on the other. now that you say that, pilot system was just ever slightly lean coming down from a throttle blip... i'll tune the pilot air screws and resync the carbs next time i get a chance. i just got a report back from the rider after she took the bike to work today. and after rebuilding everything and switching to a different oil, the sound is almost completely gone.

still not sure what the ticking was, but using the stethoscope (best $3 ever spent on a tool) i was able to tell it was coming from the intake side of the cylinder, which is where those clean marks on the cylinder were.

thanks for looking btw

Racer x · February 19th, 2013, 06:52 PM

Could the ticking have been the cam chain tensioner?

February 19th, 2013, 10:08 AM	#1
alex.s wat Name: wat Location: tustin/long beach Join Date: Sep 2009 Motorcycle(s): wat Posts: Too much. Blog Entries: 5 MOTM - Oct '12, Feb '14	a recent adventure @Racer x - what do you think about this next photo? looks like piston slapping the head right? we took it apart to examine a light tick when warm and found that.. journal bearings weren't bad enough to feel it. had plenty of power. cleaned everything up reassembled and put different oil in and the tick is basically gone unless you are listening with the stethoscope __________________________________________________

February 19th, 2013, 11:39 AM	#2
Racer x ninjette.org certified postwhore Name: Eric Location: Iowa City Join Date: May 2009 Motorcycle(s): 2008 Kawmeracchi 350 2010 Project X Posts: A lot. Blog Entries: 54 MOTM - Sep '18, Feb '16	Looks like the flame front over the valve reliefs. Is there a mark on the head. There should be a large gap between the top of the piston and head. __________________________________________________ Top speed 123.369mph. Ohio mile Worlds fastest 250 ninja

February 19th, 2013, 04:25 PM	#5
Racer x ninjette.org certified postwhore Name: Eric Location: Iowa City Join Date: May 2009 Motorcycle(s): 2008 Kawmeracchi 350 2010 Project X Posts: A lot. Blog Entries: 54 MOTM - Sep '18, Feb '16	ya it is from riding around rich then for some reason it leaned out and took the carbon off. How are the valves on that side? __________________________________________________ Top speed 123.369mph. Ohio mile Worlds fastest 250 ninja

February 19th, 2013, 04:45 PM	#6
alex.s wat Name: wat Location: tustin/long beach Join Date: Sep 2009 Motorcycle(s): wat Posts: Too much. Blog Entries: 5 MOTM - Oct '12, Feb '14	valves and guides looked perfect actually, seated well, no damage on the valves themselves, and the length of the valve rods were clean and shiny and didn't have any scaring. all valves vs. guides were solid and seemed to be in good shape. intake valves looked dark brown... maybe a little too dark. exhausts looked light tan, perfect color though. only 'odd' thing was a little extra carbon build up on one side of the intake and not so much on the other. now that you say that, pilot system was just ever slightly lean coming down from a throttle blip... i'll tune the pilot air screws and resync the carbs next time i get a chance. i just got a report back from the rider after she took the bike to work today. and after rebuilding everything and switching to a different oil, the sound is almost completely gone. still not sure what the ticking was, but using the stethoscope (best $3 ever spent on a tool) i was able to tell it was coming from the intake side of the cylinder, which is where those clean marks on the cylinder were. thanks for looking btw __________________________________________________

February 19th, 2013, 06:52 PM	#7
Racer x ninjette.org certified postwhore Name: Eric Location: Iowa City Join Date: May 2009 Motorcycle(s): 2008 Kawmeracchi 350 2010 Project X Posts: A lot. Blog Entries: 54 MOTM - Sep '18, Feb '16	Could the ticking have been the cam chain tensioner? __________________________________________________ Top speed 123.369mph. Ohio mile Worlds fastest 250 ninja

February 19th, 2013, 12:08 PM	#3
choneofakind ninjette.org certified postwhore Name: . Location: . Join Date: Feb 2011 Motorcycle(s): . Posts: Too much. MOTM - Feb '13, Feb '14	An egg carton! Brilliant!

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