JoeHazzard

Thanks AKheathen, They should have been printed on them. But they were not. I decided I will go smaller if I do anything. I can't stand the idea of detuning. So if what your saying is true the Athena domes should be around 23 to 21. So I'll probaly go with 20 to 18cc domes. Does anyone know if any other companys big bore domes will fit the Athena head?

I'm thinking of switching up my dome size. I have the Athena BB kit w/68mm pistons and stock stroke. I'm not sure what size domes they came with because it didn't say on them what they were. Which is kinda gaytarded. But the compression is suppose to be 11.9:1 and should run 96 octane. I usally mix 2 gallons 110 and 3 gallons of 93 = about 100. So if I'm already running 100 I was considering running 1cc smaller to fully utalize the octane or go slighty bigger to run 93. The bike runs strong now but had a coolant leak from a bad o-ring and not sure if it was caused by a slight ding on the dome itself which could have ate the o-ring. New domes would take in out of the equation. So if it eats this o-ring I'm getting new domes.

Well I found a place that sold the Athena 392 top end gasket set, so I went ahead and ordered it. That way I know they will be the right size, but their still going to be the lower quality black ones. So if anyone could measure stock size domes for me that would be great. Does anyone know what size domes the Athena kit comes with? All it said was that it would have 11.9 to 1 compression ratio and to use at least 96 octane. I haven't done a compression test yet but I would like to able to run straight 93. It would be a little easier on the wallet.

I have the Athena 392 big bore kit on my banshee and had a leaking o-ring that had a small chunk takin out of it. So I need some replacements. The cyclinders are 68mm and the o-ring looks to be about 75mm. Do most of the cool heads take this size o-ring. I'm having a hard time finding any Athena replacements and possibly some made from viton. Can anyone help I have a trip to motocove soon and need this thing ready.

Not now. Me and a friend put the top end on last night. I'll just have to see how it does when I get the rest it together.

They are brand new Athena cyclinders. What I was wondering what the stock porting on the Athena's would be be comparable to? Drag port, Trail port, ect. They are deffinitly more opened up than the originals.

I recently bought this kit. I'm waiting for some wrist pin bearings to come in before I install it. Does anyone know what this kind of porting looks like it would do? Here's the old one's. I bought this kit because I was going to just have the cylinders bored and fitted with new pistons but the one cylinder had a hairline crack underneath the exhaust port, it had a crapy port job, and they had two different pistons in it. Same size different brands which had caused a compression difference of 8lbs. 120psi on one 128psi on the other.

I took some pictures of the new cylinders just for comparison. Here's the old one's. I bought this kit because I was going to just have the cylinders bored and fitted with new pistons but the one cylinder had a hairline crack underneath the exhaust port, it had a crapy port job, and they had two different pistons in it. Same size different brands which had caused a compression difference of 8lbs. 120psi on one 128psi on the other. On a different note. My gas station down the street is now carrying Sunoco race fuel. I was wondering which would be best for this application. "The Standard" which is 110 octane leaded fuel non-oxgenated. Or The 260 GT which is 100 octane unleaded gasoline thats oxygenated 3.3%. Both cost $7.29 a gallon right now.

Hello Everyone, I recently bought a 93 Banshee and decided to tear it down, paint the frame, and put a big bore kit on. I bought the athena 392cc kit even tho there was'nt a whole lot of reviews on here about it I figured I would try it out and see what its all about. I got the kit in yesterday paid $765 shipped and got it about three days. Which I thought was a pretty good deal I guess. The cylinders definitly have bigger ports than stock and have 2 extra holes on the exhaust side not sure what there called (power ports maybe?). I don't know much about port timing or how to check it. The pistons looked kinda cheap, their cast aluminum but will probaly work fine. It also came with what looks like a cool head w/ domes, studs and gaskets. It did'nt come with wrist pin bearings so I am ordering some before I install the kit. I was planning on running my stock carbs for now and just jetting them accordingly. I'm not sure what size later to go up to later, any input would be great. I'm running the stock airbox modded w/ those foam holes w/ lid no snorkle w/ a Toomy foam filter. FMF Fattys, power core 2s, timing advanced +4. Compression is 11.9:1, 68mm pistons, and it says I have to run at least 96 octane fuel w/ synthetic oil. Will the stock carbs be big enough? My elevation is 120 ft above sea level I was thinking on mains. -snorkel removed 1-2+ -Toomy foam filter 0-2+ -FMF Fattys 8+ (2+ on pilots) -Timing advance 0-1+ -look like prostock reeds 0-1+ Equals 9 to 14 sizes bigger on mains so between 310 to 360 and 27.5 to 30 on pilots. Not sure though what the different porting is going to do and what needle to run. I guess I'll run 110 octane race fuel and a 32:1 mix. Any input or suggestions? I plan on using this machine for wooded trails, MX tracks, and PA hill climbs.