Attn. 426 owners...

[#77]

Does a 426 piston require a new sleeve? I am rebuilding a buddy's 400 and he wants a 426 motor. I know wiseco offers a sleeve, but I don't know if it is required or if I can just bore the stock one out.

Thanks,
77

[Silverfox@C&DRacing]

you don't have to resleeve it but is a good idea since that is the last bore in the stock cylinder and the cylinder walls are pretty thin and will create more heat but to answer your question you don't have to sleeve it.

[underpowered]

My 2000 426 is just bore, but it is the last one before a sleeve is needed.

[torqen2k1]

Nope. but I would recommend getting a sleeve to keep the heat down.

[RIDER11X]

Originally posted by Silverfox@C&DRacing
you don't have to resleeve it but is a good idea since that is the last bore in the stock cylinder and the cylinder walls are pretty thin and will create more heat but to answer your question you don't have to sleeve it.

So in that case, does the cylinder get bored out to fit a thicker sleeve?:huh

[K_Fulk]

Originally posted by RIDER11X
So in that case, does the cylinder get bored out to fit a thicker sleeve?:huh

Yeah, its the regular 440 sleeve but its just 88mm on the inside instead of being bored out to 89mm.

[K_Fulk]

Originally posted by torqen2k1
Nope. but I would recommend getting a sleeve to keep the heat down.

Why would a thicker sleeve keep the heat down? It takes longer to dissipate heat through a thicker piece of metal than a thinner one.

[Rico]

Originally posted by #77
Does a 426 piston require a new sleeve? I am rebuilding a buddy's 400 and he wants a 426 motor. I know wiseco offers a sleeve, but I don't know if it is required or if I can just bore the stock one out.

Thanks,
77

Take it to a 416 instead.

[Tackett]

your best bet would to get a sleeve. a buddy of mine has a 426 without a sleeve and he really gets some heat. headpipe will glow red and oil will bubble after 10 min of ridding.the dipstick gets so hot in the oil tank that its almost impossible to get it out with ur hands.so u should probably get the sleeve and leave those problems behind u.

Originally posted by Tackett
your best bet would to get a sleeve. a buddy of mine has a 426 without a sleeve and he really gets some heat. headpipe will glow red and oil will bubble after 10 min of ridding.the dipstick gets so hot in the oil tank that its almost impossible to get it out with ur hands.so u should probably get the sleeve and leave those problems behind u.

man his quad is just messed up. that problem is WAY beyond anything a thicker sleeve would help.

I have a 463 stroker with a 426 bore on the stock sleeve and never have any kind of issues with heat!

[Bill Fuller]

I never had any overheating issues with my 426 either.I agree with GNCCer and Rico.I also would suggest the 416 over the 426 power gains for the 426 compared to the 416 are minimal.

[UglyMotha™]

Originally posted by Tackett
your best bet would to get a sleeve. a buddy of mine has a 426 without a sleeve and he really gets some heat. headpipe will glow red and oil will bubble after 10 min of ridding.the dipstick gets so hot in the oil tank that its almost impossible to get it out with ur hands.so u should probably get the sleeve and leave those problems behind u.



really, and you think all this is due to the sleeve :huh



truthly your buddy has some other issues it's deffiantly not the sleeve could be the piston to wall clearance, but that's not the sleeves fault

[Tackett]

theres something wrong. wut can i say GNCCER put it all together. so its comin outa his ***...hahaha.i think that honda juss can produce a bike bad enough to handle all the hell that we put them through.