First banshee, have a few jetting questions

[banshee36]

Just bought my first banshee, it's a 99 bought it for $950 and needs a little work. Engine mods include LRD exhaust with DG slip on, v force 3 reeds, wiseco pistons bored .020 over, twin air filter, and keihin carbs. I bought it and it ran okay but not great so I tore the engine down, replaced coolant, and in the process of cleaning carbs. I realize that banshees have mikuni carbs stock and mine has keihin. The main jets are 140, pilot jets 58. Wondering if this is the correct jetting for the mods that are done to it? I ride at about 1200 ft, 75 degrees. Not sure of the size of the carbs, maybe 28? If you need any more info, let me know. Also, previous owner said to run amsoil dominator at 50:1, is this correct or should I richen it up to be on the safe side?

[muggzy]

Not familiar with the carb but i'll give you my 2 cents worth on the oil mix: I've been running Maxima semi synth 2-stroke @ 32:1 for nearly 2 1/2 years and recenly checked my compression (145psi ea) it was as good as the day I rebuilt it. I also run a little rich on my jetting. So the question you have to answer is do you want every available ounce of power or do you want long-term reliability? Many on here will tell you to run 40:1 but you can't argue with my record Oh, if you run the way I do, you ought to gap your plugs @ 0.022 and you'll never have a problem with them fouling on you.

[banshee36]

Measured the carbs tonight and the models are keihin pj 34 with 140 main jets, 58 slow jets, 1 1/2 screws out on air screw

[Larry's Shee]

When you say you tore the engine down, what do you mean by this? What is the compression on engine. What is it doing that it's not running right? What do your plugs look like? As to carbs I'm not familiar with your set-up. Look around at other threads to see what others are running, also sticky titled "What jets are you running"

 

I'm with you on the oil muggzy. The factory owners manual calls for 24:1 oil. There is a reason for that. I'm running 28:1 Klotz benol. There's a good read on Blaster forum on oil. I can live with less power and maybe a fouled plug now and then.

Edited May 21, 2011 by Larry's Shee

[banshee36]

When you say you tore the engine down, what do you mean by this? What is the compression on engine. What is it doing that it's not running right? What do your plugs look like? As to carbs I'm not familiar with your set-up. Look around at other threads to see what others are running, also sticky titled "What jets are you running"

 

I'm with you on the oil muggzy. The factory owners manual calls for 24:1 oil. There is a reason for that. I'm running 28:1 Klotz benol. There's a good read on Blaster forum on oil. I can live with less power and maybe a fouled plug now and then.

I tore the engine down to look at the pistons and replace anti-freeze. I don't know the compression but it seems pretty good. I believe it just needs a carb clean to run better and the plugs look pretty good. I was just wondering if anyone else is running a similar setup with these carbs and what they are running for jets?