what is the worst that could happen? (sand and spinning stuff)
Posted September 13, 2006 - 07:51 PM
i was just throwin my JD needle into my 06 wr 450, (thanks to the speedy delivery of TT)
when i took my old needle out, i noticed that about half way down the shaft was pitted all to crap, like it was sand blasted,
this was sand from the oragon dune last month, some got past the air cleaner,
when i dropped the carb access plug i noticed sand in the bottom of the plug,
how and where did all this sand come from and how did it get in there?
my other Q is my boiler still does not smoke, the oil is still always clean, after a 100 miles or so i drop the oil, every 300 or so i do a full filter/oil change
i have gone a few hundred miles or so since the dunes
i don't ring this thing out, but i ride it hard and fun at a moderate pace,
should i be lookin at rippin this thing down now? or in a month or two?
and if so what damage am i lookin at? what stuff should i be thinkin about changing? valves,piston, barrel,crank bearings? what else?
thanx for any replies,
i'm kinda new to the 4 stroke stuff
Posted September 13, 2006 - 09:42 PM
The middle of the needle WAS sandblasted... that is the area that is exposed to the throttle bore.
Expect earlier than normal failure of wheel and swingarm bearings.
Posted September 13, 2006 - 10:19 PM
Posted September 13, 2006 - 10:52 PM
Posted September 14, 2006 - 12:33 PM
All you can do now is keep a check on things such as oil usage and valves and just keep riding it. Use a good tacky filter oil and dunk and squeeze the excess oil out
Posted September 14, 2006 - 05:18 PM
he figures that if i keep on it with the oil changes, and watch for any changes in performance (coughin' oil) that it should be ok until i can take my M/T beer cans in for the 488 kit1 lol
when i got back from the dunes there was a section on the gasket surface that allowed the sand through, the jury is still out as to why that happened, but i have ordered the yz bracket and filter cage, i am not comfortable with the hooky strap that holds my filter on,
thanx for your thoughts on this
Posted September 14, 2006 - 06:25 PM
Posted September 14, 2006 - 06:36 PM
Dust may pass harmlessly through, while sand is extremely abrasive. Sand can also be extremely fine, and both sand and silt get into everything.
Sand seems a bit coarser than dust to me, Iwould have thought that sand would have been easier to keep out of the motor.
Posted September 14, 2006 - 07:53 PM
Posted September 14, 2006 - 10:47 PM
i found out a buddy of mine has a scope that can fit down the sparkplug hole!
god i love mechanics!
can't wait to see what it looks like.
should i try and post pics?
anyone wanna put bets as to what extent the sand has worn the walls?
this bike had about a 1000k when i went to the dunes, it has 1600 on it now
i will check the boot to airbox when i do the scope thang,
so who thinks i gotta do a rebuild now?
who thinks i have minor damage that can wait for a while?
who thinks i have no damage?
i will see my buddy tommarrie, (friday) and i will post the results friday night
till then PLACE YOUR BETS!
EITHER WAY ITS ALL GOOD!
chow for now, falker,,,out lol
Posted September 14, 2006 - 11:11 PM
But if you hear some weird inbalance/vibration that is really really odd, stop before parts come out of the engine at speed.
Seen a couple of kawi's do that
Posted September 15, 2006 - 03:38 PM
Posted September 15, 2006 - 07:32 PM
Posted September 15, 2006 - 08:40 PM
he's right, havn't had the history, but it does a good job of keeping sand out of the carb on my WR, however not so good at keeping water out of the carb when I went swimming with it.
I I know that greasing the airfilter lip makes a nasty cleanup chore at filter service time; but it works..I've been doing it for over 30 years.
Posted September 18, 2006 - 05:08 PM