There are other things that you will need for the big bore kit. If you're not mechanically inclined, these big bore kits may not be for you. Also, if you don't plan on tricking out your quad, you might pay more money on everything than your quad is worth. You'll have to have a machinist install the sleeve for you ( a regular mechanic cannot do it), and either you or a mechanic will have to put the engine back together. Other things you'll need is a reground cam (you'll need your original cam - has to be in descent shape - as a core exchange), you'll also want an aftermaket higher flowing exhaust, bigger carb or bored out original carb with larger jetting, potentially a new higher reving CDI, and potentially an external oil cooler. Those last two things aren't really necessary, just extras if you really want to get the most out of the new higher reving mill.

Personally, I wouldn't do this to just any quadsport either. I wouldn't want to have a $1000 motor in a sport frame that doesn't have nearly every bearing replaced or throws chains like many of them do.

Just to give you an idea of what I'm planning, I'm going to powder coat my '86 frame Suzuki Blue. I've already purchased original oem '86 plastic and decals (except nose piece which is for an '88 - blue). I have redesigned my stock swingarm by installing a chain tensioner as well as a thicker front pipe where the swingarm pivots. It hasn't thrown a chain since I made the mods. (I may sell the swingarm if I decide to modify an aluminum quadracer swingarm - haven't decided yet). I'm currently running a stock 250 quadracer axle. I'm going to modify my stock front A-arms to be about +2 or +3 on each side. I'm also going to run a quadracer headlight, pro taper bars, 87-92 quadracer wheels (switching to 5 bolt rear hubs), and I may install a Goki electric start. Yes, they make them again! (about $300 though). I'll put on a better CDI if I can find one. I'm planning on putting on an oil cooler (Regarding the question of do I think it will be hard to put on - probably. But I've seen it done so I know it's possible.) On a quad like this with this much time and work, I won't feel bad droping some money into the motor. But on an otherwise stock quad, I wouldn't do it.

Oh yea, as far as direct bolt on aftermarket boingers, Works makes em. I thing they make single and double rate shocks for the front, and single with remote resevoirs for the rear. I occasionally see them on eBay. Personally, I think all of the aftermarket shocks are way overpriced. I plan on having even better suspension by modifying my shock mounts in the front to accept 250 quadracer shocks, and I'll probably modify the rear to run a quadzilla rear shock. This will give me longer travel, and more spring to support my 250+ lb butt.

 

for the front shocks, Works is pretty much your only choice. even if you modify to run q'racer shocks, you'd still want to go w/ aftermarket shocks. the oem shocks aren't much better than the q'sport's. Works makes a single rate non-rezzy shock for @$325 a pr or dual-rates w/ remote rezzy for @$500. if you ride aggressively (and who here doesn't!) the non-rezzy shock starts to pack up after about 20 min. of riding. i went for the dual-rate remotes.
if you want to lose your airbox, you can bolt up a Raptor 660 rear shock with just a little bit of modification to the top mount. it's 2' longer than the stock shock but i think i can dial down the preload pretty soft since the Raptor weighs 70+ lbs more and i'm using a +4 swingarm.
i'm waiting on my new braided brake hoses to show up, then i'll be ready to put 'er back together

 

Is there a big difference with the 230s and the 230e? Can I just use the works shocks from it?