Georgedickels51!!!!

[Jackstand Johnny]

Bah! I'm jealous as hell you got that big bore kit! I wanted it bad and I live 20 minutes away from the guy selling it.
Well, congradulations on making your engine beast as hell. Good luck with everyting, and no hard feelings.

[dgyver]

You must be referring to the 555 kit that was on ebay.

[joshr08]

i have looked there isnt anyone that makes the big bore kit anymore is there.

[dgyver]

Wiseco stopped making the 79mm pistons for V&H in 1992. They were originally designed for the GS450. Swapping sleeves is best as the stock sleeves get very thin with a 5mm overbore. I have a chipped sleeve showing the likely damage. I built a 555 several years ago. I have one other 79mm piston and probably never find another. No problem since I am assembling a 569 with 80mm pistons. Larger sleeves are required and relief cut into the cases. I bet the buyer may find out the hard way that this is required with the cylinder that he just bought, since it was stated that the sleeves were swapped.

There is another option with 78mm GPZ pistons, which I have a running motor with them installed. 

[Kurlon]

What are you sourcing your 80mm slugs from?

[The Buddha]

80mm is FJ1100 right or 1200 ?
Cool.
Buddha.

[dgyver]

I do not know what they are from, probably GPZ. I bought them from a ex-racer part-out.

Stock FJ1200 are 77mm and 4-valve. That is what I have for the GR w/ GSXR head, if I ever build it.

[The Buddha]

There is a guy in my backyard who has 82 mm (I thiink) pistons for a 2 valve GR that he had made, and he got his GR crank stroked 5mm and he was building a bored+stroked GR with an 851 displacement.
I should stop by his place and check out how its comming along.
Cool.
Buddha.

[Kurlon]

I pinged Wiseco to see if they still had the specs to re-make the fabled 79mm pistons:

We have a custom cycle piston division that requires a 24 piece minimum
with the cost being approximately $125 a piston. Please let me know if
we can transfer your email to their department.

Well... it was worth a shot.

[georgedickels51]

Hey guys.  I still have it.  I kinda decided that I wont have time to complete the job.  I paid $500 for a ported head with heavy duty valve spring and the cylinders and pistons.  I would be willing to part with it to just get my money back.  If anyone is still interested gimme a call.
Christopher Dickey
919 800 7429

[Jackstand Johnny]

I call dibs on it! As for what dguyver was saying, is there something wrong with this setup? Will more work have to be done? Thanks.

[dgyver]

If I remember correctly, the seller said the cylinders had the sleeves replaced. This is better for reliability, but they may not fit into the cases without grinding them little.

[Jackstand Johnny]

What cases would that be? Sorry, I've never biult an engine. Im someone familiar with cars, but not with bikes. Of course I'm sure Buddha will be along to rub that one in but in the mean time could you clarify? Thanks!

[The Buddha]

What cases would that be? Sorry, I've never biult an engine. Im someone familiar with cars, but not with bikes. Of course I'm sure Buddha will be along to rub that one in but in the mean time could you clarify? Thanks!

Right on cue ...
Dude ... maybe you should leave em 55 cc kits to the professionals. I mean, 50cc mopeds are fine for you, you dont need to be boring it to 55 cc and getting all that more power.
I have a nice luna moped for you, 100 mpg from 31CC of pure power ...
Cool.
Buddha.

[Kurlon]

Car blocks combine the cylinders and 'base'/cases into one solid block.  On bike motors, the cylinders can be lifted off the 'block'.  The 'block' can then be separated to get at the internals, hence the term 'cases' to describe the two halves that combine to form the base or block of a motorcycle motor.

[Jackstand Johnny]

So would they have to be grinded down to be shorter? By the way Buudha, Im a vespa kinda guy.

[the mole]

OK, I've got my helmet on and the sandbag wall ready for the incoming 

Why would anyone (especially someone who seems to know f... all about it) want to spent bucketloads of time and money building a 568 3/4 cc GS? If you want to go that little bit faster, just sell the GS, buy some 600 sportbike and de-tune it a little. Less hassle, more performance with suspension and brakes to match.

And then when you've got the 600, someone on your block is going to have a 750, so you'll need to hot up the 600.......
There's a nice Hayabusa turbo on eBay, 300 hp, then you'd have lots of spare time to go riding instead of wrenching.

Sorry, rant over.

[georgedickels51]

hey, its a fun project really.  It would be fun to have a sleeper when you pull up next to one of those honda civics with a fart can  .  I want to do it eventually, I just dont have the time right now.

[The Buddha]

OK stop ... stop ...
On a 4 stroke, the head is waaaaaay more vital than cylinders and CC.
To out run your fart can civic as well as the 560+ you are building ... all you need is ... a 4 valve head. OK that = 4 valve pistons but think about it ... reliable, no high stress, high maintenance exotic crap, and uses the stock everything.
Heck, get a katana head from this guy pjm and hack it up and put 4 valve pistons in it and run. Will work a lot better than the 560cc you got.
Cool.
Buddha.

[georgedickels51]

Sounds interesting... would 4 valves per cylinder really make that much of a difference with an engine that small?