the fist one is a titan solo seat that fits over top of the stock seat, and the second is a brand new set of wiseco 78.95mm pistons.  yep, that makes the gs a 555cc "beast". ( well.... a beast for a gs, that is) man am I ever excited! I've got my work cut out for me this winter now. oo, shiny pistons!!

These are my first 2 mods to my 1 1/2 mounth old stock 93 gs, besides changeing the mirrors witch I had laying around.

HOLY CRAP I'M EXCITED!!! I hope to be receiveing both of these in 1 or 2 weeks!!!

You got some tail?  I can understand the excitement.

Quote from: budget speed demonI've got my work cut out for me this winter now. oo, shiny pistons!!

That will be a fun project.  Just wait til you get to fire 'er up for the first time!  I been there and done that on a GS450/499.  

I take it those are the Kawasaki pistons?  It's amazing that the compression ratio is going to work out off the shelf given that the GS500 is not a typical hemi chamber.  Wouldn't hurt to calculate the c/r before installation just in case some additional machining is needed.  She'll knock at 10:1 on regular unleaded.

Quote from: RoadstergalYou got some tail?  I can understand the excitement.

I usually feel the same way...

Good deal on the pistons. They (original V&H/Wiseco 79mm) have not been made since '92. I have one and looking for second to build another 555. High lift cams will really compliment them. Do not worry about clearances unless you have a milled head and milled cylinder (I found out the hard way).

If you need rings, Wiseco has them. I do not recall the spec numbers but have them at home.

PICTURES!?!?! get em up here man. i wanna see ur tail... hehe

Quote from: Gisser

I take it those are the Kawasaki pistons? .

No, those are the V&H pistons that were for sale on eBay last week for $85.  I believe they were specifically made for the GS for a couple of years as a kit.

dose the GS have an iron bore? Can you just bore out the stock cylinders or do you need to have them plated or sleeved?

um, depending on how high a lift, you might have to change springs,keepers, and convert to shim underbucket.

keepers? shim-under-what-nows?

SWEET!!!!!

Mega cycle makes cams for the GS, but depending on how high a lift your going to go (doesnt take much) you will need to change from the Current Shim over bucket valve adjustment system to Shim underbucket like some GSXR's and Kawi's, you will need stronger springs  and better valve stem Keepers (hold the springs on the valve).

You can use stock shims and buckets. Changing them is not required.

I ran the .417" lift Megacycle cams (//www.megacyclecams.com) in the 555 motor I built, along with heavy springs, stock shims & buckets. See page 50 in their catalog.

If your going to do cams, you might as well go ahead and throw on some bigger carbs to!
Just curious how much the tail was?

If you need rings....3110XG is the Wiseco part number for those 79mm pistons.

.417 lift is the second largest MC makes. It is a good increase in lift from stock, which is .345in/.326ex.

.380 lift is probably best for all around street use.

Carbs can be added anytime. I ran stock 33mm carbs with the 79mm pixtons & .417 cams setup. Used 145 mains. K&N lunchbox & full Yosh. The only other internal engine mod was necked valves. Also, plugged one of the holes in each the carb slides.

Larger carbs will help. To do it right, do not use CV carbs. Watch ebay. I picked up a set of 36mm flat slides from a Yamaha snowmobile for $60. They normally go for around $300.

I'm terribly curious to meet you.  Thanks to the board, I have a mental image of you as a large, friendly dog.