Just ordered my stroker

[bakedmonkey]

Ok well i finally got tired of looking at my shee sitting in a box. After my buddy let me borrow his for a day just to rub it in that his works. SO i ordered my plus 5 mm rod 4mm stroker crank from hotrod. It should be in at the end of the month. I cant wait all i need after that is some bigger pistons and to rebore it and it will be back toghter and ready to ride.. cant wait. Can any one tell me what kind of differnce it will make?

[frocashmoney24]

a hell of alot more horsepower!

[Wallrat]

Your getting it ported to match the added stroke right? Also you should consider upgrading your carbs. Don't forget you need either a spacer plate or a machine shop to cut your head 2mm deeper as well.

[njbanshee]

Its gonna be way faster!

[super88_banshee]

Your getting it ported to match the added stroke right?  Also you should consider upgrading your carbs.  Don't forget you need either a spacer plate or a machine shop to cut your head 2mm deeper as well.

340609[/snapback]

 

Do you have to have it spaced even more for the extra length of the rod too??

[rebelbanshee2]

Do you have to have it spaced even more for the extra length of the rod too??

341631[/snapback]

 

 

you *could* but your cylenders would be so f-ing high nothing would fit right. wiseco makes a 795 series piston with an offset wrist pin location for the longer rod.

 

bakedmonkey-get the jugs reported for the longer stroke. thats when youll really notice the differnece.

[bakedmonkey]

how much usally is it to get it repoted? i live in vancouver bc canada so my money is worth less but any one of any places in bc? it is worth a shot.

[Ducman]

If you get the 795 series pistons and run a spacer plate you could probably use a un-modded stock head or standard cool head dome. You could get a very basic port job for $200-300 usd, or fully ported for $500. With a very mid port a 4mm stoker will be a monster low to midrange with good top end. I'm sure there are some builders out there that can accept paypal which will convert Can $ to usd when making a payment. I know a local builder (Northern California) that would accept paypal payment. His 4mm banshee made 70HP SAE with super low end/ mid range (MX port) on stock carbs.

[doltz]

Cancel your order & get a Cheetah Cub from A & S fully ported for cheaper.

 

$1300 w/ carbs & you can have almost 100 horsies.

[decon]

ok so let me get this straight, if you run longrods and a +4 stroker, you need new pistons (wiseco 795's) and a spacer plate to be able to run a stock/aftermarket head. but with just the +4 stroker crank you need porting to match and head modifications (or stroker domes) ? correct me if im wrong, im just trying to see if im right. also, are longrods neccesary or helpful in any way?

[rebelbanshee2]

you do not need the long rods, they just help out with the reliability iof the engine

[decon]

you do not need the long rods, they just help out with the reliability iof the engine

342953[/snapback]

 

ok, now what about my other question?

[Ducman]

ok so let me get this straight, if you run longrods and a +4 stroker, you need new pistons (wiseco 795's) and a spacer plate to be able to run a stock/aftermarket head. but with just the +4 stroker crank you need porting to match and head modifications (or stroker domes) ? correct me if im wrong, im just trying to see if im right. also, are longrods neccesary or helpful in any way?

342948[/snapback]

 

If you were to just use a +4mm crank you would still need a 2mm spacer plate under the cylinders or elso the pistons will go 2mm beyond the top of the cylinders. The alternative is to have 2mm of relief cut into the domes to let the pistons go into the head. {The 795 series pistons just offset the 5mm extra length in the typical long rod (+5mm rod).} (proplem#1) If you use the spacer plate your ports will be raised that amount too. Now you need to at least lower the botom of the ports a little to compensate for raising them. (problem#2) On the +4 stroker with cut domes the ports are still centerd where they were before but with the longer stroke, the flow in and out of the cylinders is going to be different because at the same RPM as the stock stroke crank, the piston speed past the ports will be faster (also true for spacer plate) so the port timing will be diferent. The ports are designed to flow for the stock stroke. Think of it as taking the intake and exhaust cam out of a raptor and putting it in a YFZ 450. It is similar and might work but it isn't as good as if the cam were disigned for the 450.

[decon]

If you were to just use a +4mm crank you would still need a 2mm spacer plate under the cylinders or elso the pistons will go 2mm beyond the top of the cylinders.  The alternative is to have 2mm of relief cut into the domes to let the pistons go into the head.  {The 795 series pistons just offset the 5mm extra length in the typical long rod (+5mm rod).}  (proplem#1) If you use the spacer plate your ports will be raised that amount too.  Now you need to at least lower the botom of the ports a little to compensate for raising them.  (problem#2) On the +4 stroker with cut domes the ports are still centerd where they were before but with the longer stroke, the flow in and out of the cylinders is going to be different because at the same RPM as the stock stroke crank, the piston speed past the ports will be faster (also true for spacer plate) so the port timing will be diferent.  The ports are designed to flow for the stock stroke.  Think of it as taking the intake and exhaust cam out of a raptor and putting it in a YFZ 450.  It is similar and might work but it isn't as good as if the cam were disigned for the 450.

343345[/snapback]

 

alright i get it. so is that why you have to get porting for the added stroke?

[Wallrat]

You're cylinder is moving further during the same time period. Therefore your ports no longer line up as they're supposed to during the stroke. When you get stroker-specific porting they cut away some material on the ports so that everything matches up again.