Author Topic: stroke enlarging? (Read 3008 times)

Bartjan · « **on:** December 13, 2006, 06:41:29 PM »

i just came across some gsxr400 specifications and noticed that the the 1984 model has a different stroke and bore 53x 45,2mm instead of 56x40,4mm

is this an entire different engine or is it very similar to the "new" model, because in my daydream i was mounting such a crankshaft in my B4 to make it 445cc (or a very nice 494cc with the 59mm big-bore kit)

gsxr400 racer · « **Reply #1 on:** December 13, 2006, 06:46:27 PM »

If you can get ahold of one let me know cause ive been working on the same that motor has some similarity!

gsxr400 racer · « **Reply #2 on:** December 13, 2006, 06:56:17 PM »

I could build a 530cc bike! LMAO
the 71b stuff is real hard to come by!

Bartjan · « **Reply #3 on:** December 13, 2006, 06:57:53 PM »

537cc you mean

yeah im searching now, but havent found much stuff for it

PitterB4 · « **Reply #4 on:** December 13, 2006, 08:58:53 PM »

This thread isn't nearly as interesting as the subject would lead you to believe!

interfuse · « **Reply #5 on:** December 13, 2006, 09:11:30 PM »

At first I thought it was another spammer! LOL.

gsxr400 racer · « **Reply #6 on:** December 14, 2006, 08:59:09 PM »

Quote from: "PitterB4"

This thread isn't nearly as interesting as the subject would lead you to believe!

you need help in that area brother being a pharmacy tech i can recomend ya some good pills LOL

PitterB4 · « **Reply #7 on:** December 14, 2006, 09:18:28 PM »

Quote from: "gsxr400 racer"

Quote from: "PitterB4"
This thread isn't nearly as interesting as the subject would lead you to believe!

you need help in that area brother being a pharmacy tech i can recomend ya some good pills LOL

No... no... no... I'm not needing help there... I just think its an interesting topic.... really.... I'm serious! Actually... I mean... i was asking for Interfuse! That's it!!!

gsxr400 racer · « **Reply #8 on:** December 14, 2006, 09:23:59 PM »

Good show have a happy holiday Rob see ya at the beav. wera made most of the races this year nelsons how fun is that! maybe gonna do summit and vir we'll talk about the schedual when it shows maybe we can hook up more

gilad · « **Reply #9 on:** December 14, 2006, 10:42:54 PM »

cant we just use a different rod ?

Bartjan · « **Reply #10 on:** December 15, 2006, 04:37:32 AM »

the rod doesnt do anything for the stroke.

the length of the rod changes the following things:
- weight (lighter, hence shorter gives more power)
- forces on the cilinderwalls (leibaankrachten in dutch; the longer the better, because the angle of the rod is smaller)
- height of the cilinders, because a longer rod will mean the piston is located higher

if you want the rod to influence the stroke.... get a rod which is made from aluminium. it will be softer and because of that it will strech more when at the top and it will shorten more when at the bottom, giving a bit more stroke

and it wont be able to withstand the forces very long so it will break very soon...