[dan O]

hey i have a 400 ex bored out it is a 1999 honda 400ex bored 40 over so its got the 440 big bore in it i looked at my piston number and it is 4667m but no other numbers i measured the cylinder any ideas of how i can order rings the local atv store says there is more numbers but there is not

 

[shadetree]

hey i have a 400 ex bored out it is a 1999 honda 400ex bored 40 over so its got the 440 big bore in it i looked at my piston number and it is 4667m but no other numbers i measured the cylinder any ideas of how i can order rings the local atv store says there is more numbers but there is not

if it's 40 over..then thats the size of the rings you need. count how many sizes there are from standard to that size..thats your ring size.

 

[dan O]

the guy at the atv store says he needs to have the number for the piston kit

 

[jgar]

Its a Wiseco 11:1, 89mm, 440 piston.

 

[jgar]

WISECO BIG BORE 89MM PISTON RINGS ONLY TRX400EX 440: eBay Motors (item 380248058508 end time Oct-31-10 07:31:46 PDT)

 

[TRX2fiveO]

bored .040 dosent mean you have a 440 Kit though. fyi a .050 over piston is only a 85.50mm piston stock is 85mm now if it 4.00 that would be a 89mm piston which is a 440 kit. if you look real close on the top of the piston if it's a wiseco it will have the number stamped around the outter lip

ok i looked you have the first part of the number you do have an 89mm piston 4667MO8900 Piston. PK1041 should do the trick that's the complete kit.

 

[Redracer]

Agreed, a bored four over does not make a 440.

 

[dan O]

well i called up wiesco and they said their has to be more nummbers but were they should be is coroded i have the 89 mm bore wich is a 440 and i ordered rings valve seals and a copper gasket kit because the stok ones blow out easy i heard

 

[mud99]

If you have the 440 big bore you will need to change the head bolts to a harder bolt.