The problem with the Lone Star shortened swingarm is that it's $850 new. You can get a 91-92 stock aluminum swing arm for $100 or so used. If you know someone that can weld aluminum good, it wouldn't be too hard to modify the stock swingarm. Plus, it's aluminum so it will be lighter than the Lone Star.

 

ok yager, i am about to get a new job so i will have the money for the big bore kit in a few weeks if your ready.and i looked at the carbs on sudco but didnt see a price or anything, how much was yours malhombre? and does anyone make a transmission/clutch kit for these things ? im am planning on totally redoing the motor this summer so any help is much appreciated.o yea one more thing yager, ive noticed how small my cylinder head is, is it gonna be thick enough to really hold up after it is bored to 280 ? or would it be better to get a new head ?

 

i got my carb thru my builder. he got it at dealer discount and passed the savings on to me. got the carb and intake boot for under $100.
you can get a set of friction discs for your clutch from Vince's for @$50

 

Why wait untill you can scrape up 3 others to go in on a kit, when you cam just get a 273 from FST tomorrow? I'd look to get at least 4 others if you want to wait, because someone almost always backs out.

 

How much is the kit and is it just as good?

 

Also how will the engine hold up to the 12:1 compression. Will I need to upgrade the connecting rod or do something to the crank? Will the works shocks for the 250r fit on the 230s with +2" a-arms?

 

Bama, sorry I haven't responded yet. Actually, I'm not quite ready to get the kit. I was hoping maybe this summer... Let me know if you can't wait that long. As far as your head being thick enough, putting a larger bore sleeve in your cylinder shouldn't affect this at all. What will affect the head is having the higher compression piston. However, I've never heard of anyone complaining about the 273 kit. Your stock head should be fine. You will want a different cam in it though. If you meant to ask about your cylinder being too thin, the sleeve is really where the strength is. The aluminum cylinder is more for cooling. However, there will be more heat created from the larger displacement motor. One addition you might consider making is installing an external oil cooler. I've seen one added on a quad sport where they tapped into the oil through the oil filter housing. I think it was retro fitted off of a Honda 400EX.

Mbrooks, I've never heard of Four Stroke Techs 273 kit. I tried to look it up online but had no success. I would be interested in looking into it if it exists. Let me know anything you know about it. Thanks!

05LTZ400, your lower end should hold up to the big bore kit just fine. The shocks probably won't fit.

 

can i get the 273 kit for my stock 87 lt230s have it installed and ride or do i really need other things

 

A big bore isn't the place to start, and wouldn't be worth it on an otherwise stock bike. Much better things to spend the $$$ on.

 

I can wait until summer, no problem. What aftermarket shocks will fit? Also with the 273 kit will 91 octane gas be okay? Do you think the oil cooler is hard to put on?