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$$$TRAV$$$
Blaster class
Joined: 28 Feb 2008
Posts: 175
Location: Perth WA
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 Posted: Tue Oct 14, 2008 10:05 pm Post subject: blaster (meltin piston every ride) problem |
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i recently put a pipe reeds and air filter on my blaster and a 310 main jet then three rides later it melts a piston as of to much air so i rebuild it with wiseco piston and .20 oversize then three rides later another piston is melted.
i am mixin my fuel 25:1 and the plug was dry and blak
my thoughts on this r that it is gettin to much air and i need a bigger main jet
can ne one help me as to wat i shuld do cheers heaps trav
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LTR 450
ELKA ELITES
LONESTAR A ARMS
LONESTAR STEM
LONESTAR AXLE
FLEXX BARS
DOUGLAS BEADLOCKS
ASV LEVERS
YOSHI PIPE
CHERRY BOMB
AC BUMPER
BLINGSTAR NERFS + HEELGUARDS
MAIER PLASTICS
SAVAGE SUZUKI GRAPHICS
RAZR 2S |
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doorslammer
Roostin Away
Joined: 24 Jul 2007
Posts: 902
Location: Northern WA
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| Posted: Tue Oct 14, 2008 10:08 pm Post subject: |
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still sounds lean, posible air leak? does it idle fine?
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01 Banshee
Never take life seriously. Nobody gets out alive anyway |
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$$$TRAV$$$
Blaster class
Joined: 28 Feb 2008
Posts: 175
Location: Perth WA
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| Posted: Tue Oct 14, 2008 10:15 pm Post subject: |
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it will idle all day if it got fuel it runnin sweet but yea till it melts a piston
all gasket brand new after rebuild
_________________
LTR 450
ELKA ELITES
LONESTAR A ARMS
LONESTAR STEM
LONESTAR AXLE
FLEXX BARS
DOUGLAS BEADLOCKS
ASV LEVERS
YOSHI PIPE
CHERRY BOMB
AC BUMPER
BLINGSTAR NERFS + HEELGUARDS
MAIER PLASTICS
SAVAGE SUZUKI GRAPHICS
RAZR 2S |
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doorslammer
Roostin Away
Joined: 24 Jul 2007
Posts: 902
Location: Northern WA
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| Posted: Wed Oct 15, 2008 8:14 am Post subject: |
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did you change anything else in the carb like the needle position?
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01 Banshee
Never take life seriously. Nobody gets out alive anyway |
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4stroker
Joined: 15 Jan 2007
Posts: 1420
Location: North Queensland
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| Posted: Wed Oct 15, 2008 9:25 am Post subject: |
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show us some pics of the pistons and bore
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2002 SE Banshee |
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$$$TRAV$$$
Blaster class
Joined: 28 Feb 2008
Posts: 175
Location: Perth WA
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| Posted: Wed Oct 15, 2008 8:10 pm Post subject: |
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yes we pulled the needle up one clip then ran it and one ride later bang piston next ride bang piston
_________________
LTR 450
ELKA ELITES
LONESTAR A ARMS
LONESTAR STEM
LONESTAR AXLE
FLEXX BARS
DOUGLAS BEADLOCKS
ASV LEVERS
YOSHI PIPE
CHERRY BOMB
AC BUMPER
BLINGSTAR NERFS + HEELGUARDS
MAIER PLASTICS
SAVAGE SUZUKI GRAPHICS
RAZR 2S |
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$$$TRAV$$$
Blaster class
Joined: 28 Feb 2008
Posts: 175
Location: Perth WA
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| Posted: Wed Oct 15, 2008 8:11 pm Post subject: |
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yes we pulled the needle up one clip then ran it and one ride later bang piston next ride bang piston im unsure of how to post pics so can sum give me there email address so i can send the pics if u will put them up for me cheers trav
_________________
LTR 450
ELKA ELITES
LONESTAR A ARMS
LONESTAR STEM
LONESTAR AXLE
FLEXX BARS
DOUGLAS BEADLOCKS
ASV LEVERS
YOSHI PIPE
CHERRY BOMB
AC BUMPER
BLINGSTAR NERFS + HEELGUARDS
MAIER PLASTICS
SAVAGE SUZUKI GRAPHICS
RAZR 2S |
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ReD HeaderZ
Roostin Away
Joined: 24 Jul 2006
Posts: 828
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| Posted: Wed Oct 15, 2008 8:28 pm Post subject: |
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| $$$TRAV$$$ wrote: | | yes we pulled the needle up one clip then ran it and one ride later bang piston next ride bang piston im unsure of how to post pics so can sum give me there email address so i can send the pics if u will put them up for me cheers trav |
Check out this to find out how to post pics.
http://www.ozatv.com/forum/viewtopic.php?t=6477
If you are having issues, call Zak at explosiveracing.com.au
or Dale or Toli rootsracing.com.au
They are engine builders. |
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4stroker
Joined: 15 Jan 2007
Posts: 1420
Location: North Queensland
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| Posted: Wed Oct 15, 2008 8:46 pm Post subject: |
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send the pics to me mate at mark.tomarchio@maunsell.com ill host em in the morning when i get to work.
will need to see a pic of the tops and sides of the pistons, also the bore.
so you richened it up (moved the clip down one notch, effectively raising the needle) and it still nipped up?
has the person boring the barrel been giving it enough bore clearance? they need 3 to 4 thou being a forged piston? how long into a ride did it nip up? could it have been a cold seizure? eg didnt warm it enough b4 flogging it.
its most likely an air leak though, most probably through the intake gaskets since you replaced the reeds etc. did you use new ones and 3 bond or somethign similar? what about the base gasket? did you use a new one and some 3 bond? b4 it goes back together again check the base gasket surfaces on the cases and the barrel and make sure they are flat. ditto for the reed gasket surfaces.
could also be a crank seal if they havent been replaced for a while.
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2002 SE Banshee |
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$$$TRAV$$$
Blaster class
Joined: 28 Feb 2008
Posts: 175
Location: Perth WA
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| Posted: Wed Oct 15, 2008 8:53 pm Post subject: |
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yep no worries but i cant get u pics of the bore it now bak in the shop but i can tell u it scored lyk u wuld never believe also i replaced most gasket and smoothed bak the bases with emery paper
_________________
LTR 450
ELKA ELITES
LONESTAR A ARMS
LONESTAR STEM
LONESTAR AXLE
FLEXX BARS
DOUGLAS BEADLOCKS
ASV LEVERS
YOSHI PIPE
CHERRY BOMB
AC BUMPER
BLINGSTAR NERFS + HEELGUARDS
MAIER PLASTICS
SAVAGE SUZUKI GRAPHICS
RAZR 2S |
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4stroker
Joined: 15 Jan 2007
Posts: 1420
Location: North Queensland
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| Posted: Wed Oct 15, 2008 9:27 pm Post subject: |
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hmmm emery paper wont make em flat you need to get an engineering shop to check them, who ever is boring it should be able to do it.
also i know the bore will be scored but where it is scored will tell you the story of how and why it seized.
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2002 SE Banshee |
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HST Powersports
4fiddy Racer
Joined: 11 Jul 2006
Posts: 204
Location: Newcastle
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| Posted: Wed Oct 15, 2008 10:28 pm Post subject: |
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| put the air box lid back on i had the same problem a few months ago it will run much better and wont melt pistons that is if u have taken it off |
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doorslammer
Roostin Away
Joined: 24 Jul 2007
Posts: 902
Location: Northern WA
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| Posted: Thu Oct 16, 2008 8:16 am Post subject: |
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| u_freak_69_ wrote: | | put the air box lid back on i had the same problem a few months ago it will run much better and wont melt pistons that is if u have taken it off |
if it was the airbox lid, he just needs to jet it richer
TRAV, do a plug chop when you get it back together if you dont find out why before hand
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01 Banshee
Never take life seriously. Nobody gets out alive anyway |
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HST Powersports
4fiddy Racer
Joined: 11 Jul 2006
Posts: 204
Location: Newcastle
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| Posted: Thu Oct 16, 2008 5:46 pm Post subject: |
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| my engine had very big jets in it but still didnt like it i put the lid on and opened the lid up a little rejetted it and run it runs much better.... |
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4stroker
Joined: 15 Jan 2007
Posts: 1420
Location: North Queensland
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| Posted: Thu Oct 16, 2008 6:03 pm Post subject: |
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u mustve had a slight air leak somewhere too or something like that.
heaps of ppl run with out air box lids, even without airboxes!
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2002 SE Banshee |
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doorslammer
Roostin Away
Joined: 24 Jul 2007
Posts: 902
Location: Northern WA
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| Posted: Thu Oct 16, 2008 8:27 pm Post subject: |
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| u_freak_69_ wrote: | | my engine had very big jets in it but still didnt like it i put the lid on and opened the lid up a little rejetted it and run it runs much better.... |
did you change anything else like needle position etc. main jets arnt everything.
wheres those Pics TRAV?
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01 Banshee
Never take life seriously. Nobody gets out alive anyway |
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PeteW
Moderator
Joined: 09 Feb 2006
Posts: 1877
Location: Doreen, Vic
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| Posted: Fri Oct 17, 2008 8:36 am Post subject: |
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Does sound a lot like an air leak, if its leaking on the stator side of the crank it won't show up until its running hard. It would be worth leak testing the engine once you put it back together.
You could go up to 330 on the main pretty comfortably, how have you blocked off the oil mix input into the carb?
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www.thumbpump.com
www.dirtcomp.com.au |
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$$$TRAV$$$
Blaster class
Joined: 28 Feb 2008
Posts: 175
Location: Perth WA
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| Posted: Mon Oct 20, 2008 10:33 pm Post subject: |
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thanks to all who helped i took the piston down to the guy doin all the work and it turns out the ring gap was rong for havin a power pipe and reeds it had to be 8thou bigger anyway cheeers allll
_________________
LTR 450
ELKA ELITES
LONESTAR A ARMS
LONESTAR STEM
LONESTAR AXLE
FLEXX BARS
DOUGLAS BEADLOCKS
ASV LEVERS
YOSHI PIPE
CHERRY BOMB
AC BUMPER
BLINGSTAR NERFS + HEELGUARDS
MAIER PLASTICS
SAVAGE SUZUKI GRAPHICS
RAZR 2S |
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OZ_450
The Day Starts With OZATV !
Joined: 12 Feb 2006
Posts: 1631
Location: those who need to know knows :)
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| Posted: Tue Oct 21, 2008 7:13 pm Post subject: |
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lol what the
ring gap wrong for power pipe??
we fitted a b1 twoomey to wifes stocko 2004 model and changed jets and needle height and fitted new air filter ......... never melted a piston your builder sounds dodgy as
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black covered in 5.7 powered oversize quad
model vx ss 350 hahaha
enough bass to compensate for lack of skills
Empty Wallet Racing proudly on track for GM Motorsport  |
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Quad
The Day Starts With OZATV !
Joined: 22 Oct 2006
Posts: 2773
Location: UP FRONT
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| Posted: Tue Oct 21, 2008 7:27 pm Post subject: |
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| whot bull shi,t s that wrong ring rap |
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doorslammer
Roostin Away
Joined: 24 Jul 2007
Posts: 902
Location: Northern WA
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| Posted: Tue Oct 21, 2008 8:35 pm Post subject: |
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whats the stock ring gap and the ring gap when you have a "power pipe"?
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01 Banshee
Never take life seriously. Nobody gets out alive anyway |
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Quad
The Day Starts With OZATV !
Joined: 22 Oct 2006
Posts: 2773
Location: UP FRONT
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| Posted: Tue Oct 21, 2008 8:44 pm Post subject: |
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spray aero start around the running motor see if the motor picksup revs ,
throught gaskets, seals etc .
not into the motor ,carbie.
then you will know its sucking air leak ,leaning out . |
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4stroker
Joined: 15 Jan 2007
Posts: 1420
Location: North Queensland
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| Posted: Tue Oct 21, 2008 9:22 pm Post subject: |
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wrong ring gap eh.
dunno about this bs about the power pipe etc, but it should have 12-15 thou ring end gap, and about 4 thou bore clearance.
it is quite possible that the builder has never done forged pistons b4 and didnt set it up with enough bore clearance.
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2002 SE Banshee |
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doorslammer
Roostin Away
Joined: 24 Jul 2007
Posts: 902
Location: Northern WA
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| Posted: Wed Oct 22, 2008 8:22 am Post subject: |
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he is saying the piston is melted, not seized. but i dunno, what happened to the pic's of the piston.
is there a hole in the top or wass it stuck to the bore.
maybe who ever put it together didnt check the ring gap in the first place
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01 Banshee
Never take life seriously. Nobody gets out alive anyway |
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