450 Cylinder/Piston on a 426?


6 replies to this topic
  • Stranglersfan

Posted December 11, 2005 - 04:15 AM

#1

Hi peeps,
This might be a silly question but is it possible for an 03 450 Cylinder to fit on a 02 426 crank and bottom end, using the 426 head? the reason i'm asking is, i've been thinking about going up in CC's and rather than have to overbore and fit an oversize piston, i spotted a new 450 cylinder for a nice price and was wondering if there is any difference aesthetically between the external dimensions between these two cylinders, as it would be a much easier way of udgrading engine size without the need to re-nickalise the bore etc?

has anyone tried this? :applause:

Thanks

  • SXP

Posted December 11, 2005 - 08:22 PM

#2

Even if it would fit, which I don't believe it will, the 450 cylinder is 95 mm which is the same as your bike. The 450's get the extra ccs by stroking the crank.

  • davekaw804

Posted December 11, 2005 - 08:27 PM

#3

No go-won`t fit.A 450 is just a stroked 426 Thats how Ty Davis got 440cc`s out of his 426 Larry Roesseler stroked the crank and I assembled the engine.

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  • Stranglersfan

Posted December 12, 2005 - 01:52 AM

#4

ok, so that's a definite no-no then... looks like i'll have to have my cylinder overbored and re-nickalised if i want to get it as close to a 450cc? How would one know if the cylinder needs to be re-nickalised before fitting an oversize piston, mine seems to be in good condition as i can still see the honing marks on the bore. and ring gaps seemed to be within specs during my last rebuild some weeks ago?
I'm beginning to question is the cost worth it for an extra 18cc, maybe i should keep her at 426cc and just go for a new oem piston/rings combo? :ride:

thanks anyhoo guys :applause:

  • gearb0x

Posted December 12, 2005 - 05:40 AM

#5

what if u used a 450 crank, rod and piston. is the deck height any different 426 vs 450?

  • kelstr

Posted December 12, 2005 - 05:59 AM

#6

ok, so that's a definite no-no then... looks like i'll have to have my cylinder overbored and re-nickalised if i want to get it as close to a 450cc? How would one know if the cylinder needs to be re-nickalised before fitting an oversize piston, mine seems to be in good condition as i can still see the honing marks on the bore. and ring gaps seemed to be within specs during my last rebuild some weeks ago?
I'm beginning to question is the cost worth it for an extra 18cc, maybe i should keep her at 426cc and just go for a new oem piston/rings combo? :p

thanks anyhoo guys :applause:

yes just keep it a 426 , the nikisal cylinders are almost imposable to hurt,
and the 450 crank takes way to much effort to correctly set up for the normal guy,

i do alot of motor work , and on that bike you would be way ahead keeping it the stock configuration ,
and then sell it at some point and get a new ride :ride:
you will be happy you did :p

  • Stranglersfan

Posted December 12, 2005 - 02:02 PM

#7

yeh, i think i will keep her std and just fit a new piston kit. now does anyone know where's the best place to get an oem kit? hope you don't say "a dealer" coz my nearest dealer will charge me an arm and a leg for one! :p

Any of you guys know a reasonably priced U.S stockist :ride:

thanks again for the advice, i guess you've drawn a conclusion to my dilemna :applause:




 
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