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1  General / Tech Corner / Re: 04 yfz450 low compression on: December 05, 2008, 07:44:04 AM
i agree but i have to get it running first.  i already cleaned the carbs so my next area of interest will be the jetting. it has a GYTR exhaust.  once i get it running i will check the cooling system as well.
2  General / Tech Corner / Re: 04 yfz450 low compression on: December 04, 2008, 07:02:36 PM
if you need any parts let me know. i will save you alot of money


thats what i like to hear.  how much for the cylinder, piston and base and head gasket?
3  General / Tech Corner / Re: 04 yfz450 low compression on: December 03, 2008, 05:49:15 PM
next question.  where can i bring my cylinder in for a bore and replating?  i dont know of any local tampa businesses that do this.  any suggestions?  i want to keep it in state for a fast turn around.
4  General / Tech Corner / Re: 04 yfz450 low compression on: December 03, 2008, 09:34:46 AM
sounds expensive.  how much are we talking?  does the engine have to be removed/disassembled?
5  General / Tech Corner / Re: 04 yfz450 low compression on: December 02, 2008, 09:27:33 PM
whats the oil upgrade?  where can i find a tutorial?
6  General / Tech Corner / Re: 04 yfz450 low compression on: December 02, 2008, 06:28:41 PM
ok.  tore it down and it is officially toast.  the piston appears to be melted.  im not sure if its from a failed cooling system or excessive piston to wall clearance.  measured the cylinder and i got a shocking reading of 3.7667 inches (95.66mm)......damn!  now thats worn.  looks like a 1mm overbore here i come.
7  General / Tech Corner / Re: 04 yfz450 low compression on: December 01, 2008, 08:35:06 PM
thanks.  im in tampa.  what is the compression suppossed to be when starting?  what rpm does the decompression deactivate? 
8  General / Tech Corner / 04 yfz450 low compression on: December 01, 2008, 07:09:21 PM
just picked up this quad and it wont start.  checked for spark and its there.  sprayed fuel in the carb and nothing.  checked compression and im getting 35 psi while cranking.  i know these things have an auto decompression system.  is there a way to adjust or check it?
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