What are some minor performance upgrades I can do to my 250sx? carb, exhaust + tires?

[86trizinger]

My 1985 250sx is running pretty good now. But I know it needs some upgrades to make me happy.

What are some decent performance upgrades I can do to the trike without tearing the engine apart.
I was told a 350x carb will work?

I was thinking that and an exhaust, plus some 25" tires. BUt don't know what brand.

Need recommendations to confirm.

[dcreel]

NOS Bassani exhaust

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=300440893623&viewitem=

Put that Bassani exhaust on it with a UNI filter in the airbox, leave the lid off (depending on where you ride). Rejet the carb. Mucho gooder.

[the great gazoo]

249.00, wow, he might get it, too. Chris, if you do the 350x carb, I think you use the stock SX jets(?) and you'll need to open up the exhaust. The only cheap option(& they're probably not so cheap nowadays) is Cobra. I hear it makes a noticable difference.

[dcreel]

The difference between Bassani and Cobra is like diamonds and cubic zirconia. I apologize for giving him an option.

[Thorpe]

^^ Gotta agree with Doug, dont wreck a trike by putting cobra on it... They are just obnoxious.

[86trizinger]

Wasn't going to do a cobra no matter what. Only thing I am afraid of breaking the exhaust studs off.

What about tires? Any recomendations.

[dcreel]

I don't think you can change the gear ratio so you are limited to sticking close to the stock size. What terrain will you be riding primarily?

[86trizinger]

I only ride trails with it really. Nothing high speed or anything but there are some steep hills.
I was thinking 25" tires? Is that too big for it? I don't know what width to get though.

I love that exhaust.. Wish I could swing that much currently but I have to sell one of the atv's I have to get that.

[TheRealFatShady]

I would think 25" tires could work no problem. The gearing may be slightly different than a Big Red which has 25" tires, but one guy put 30" silverbacks on a Big Red.

I will hopefully have 30's on mine, but that will be a TRX300 engine + big bore + gear reduction.

[86trizinger]

The Bassani exhaust already sold...

The gearing is quite a bit difference from a big red I noticed. To go to 25" tires I need to go to 9" wheels as well.

[86trizinger]

Need the best choice for tires now.

I ride some mud/swamp. Trials have some steep inclines here and there and some logs. Need something agressive . Not concerned about speed or sliding them.