J-Madd

Finally the guy says "I was thinking last night. What crank are you running with these pistons. The weisco pistons are 795 series, witch are for a 4mil stroker crank. If you are running stock stroke, this is whay you have LOW compression." But I sent him a message a few days ago that said: " The rings are installed properly. I will spray soapy water around all gaskets and kick it over to look for a leak. You can feel plenty of compression upon moving the kick starter, it just doesn't show on the gauge. The gauge is good, we checked another motor and got 160 psi. We even have put a milled head on your cylinders. This is with a stock stroke crank, if that matters. Thanks so far for your help. I'll let you know how the gaskets test out." He never responded in regard to the stock crank. Maybe he didn't read it. But it was not listed in the description. Should we: - Try to get money back and go ahead and go with Cubs and new pistons - Keep the shit and buy +4mm crank

I'm not advocating tearing apart a good running motor for aftermarket pistons, but aren't the wiseco pro-lites lighter than stock? I know they don't add HP, but wouldn't it rev faster due to less rotating mass? I've raced two almost identically setup motors with same jetting, and the Wiseco one (with only SLIGHTLY more compression and dremel polished exhaust ports) pullls away on top every time, regardless of rider. I know, there are a couple other variables in there, but it's just my theory and my 0.02.

Reeds.

I'm trying to give the seller the benefit of the doubt as best I can. Here's his response. Please comment if any of his statements may be true. If this is something stupid I'm overlooking that would be great. " have no idea what you are doing wrong. These came off my personal drag banshee. I ONLY reason I took them off, is I bought a cub. These ARE high compression cylinders!!! The piston to cylinder clearance is LESS than .002!! This is IDEAL! This has to be an air leak! Head gasket, base gasket, & CRANK SEALS, or leaking between case halfs. Check these thing out. If its not the gaskets, its probably the crank seals. Hope this helps. Chad" And my response: "A crank seal would only affect one cylinder at a time, unless it was both crank seals, in which case crankcase oil would enter the right cylinder, which has not happened. Crank case seals would not lower psi to 60. Base gaskets would not lower psi to 60. The head gasket is not leaking. This was a perfectly good running motor before we swapped top ends. I have posted on Bansheehq.com and no one has answers there either. I believe that the cylinders have been bored more or honed too much since you took the motor apart. There is no ring groove, so I'm sure they have been honed since then, which is normally ok. Are you sure your machine shop or whoever honed it didn't take too much out? I'm no mechanic, but I've put together my share of Banshees. I have a stock stroke 68 mm Cub, and am currently building a +4mm 68 mm Cub. These cylinders were purchased for a friend who was to pay me back. If I get these to a machine shop and they check out, I'll quit hasseling you about this. Thanks" Please help me argue my case or prove me wrong. Either way I just want to know what's up with these pistons/cylinders.

Ok, put in 350 mains (what we had in with stock cylinders) and same shit, no power. Every thing mentioned above is still true. Could these cylinders have a bore that tapers toward the top whereas they pull through the carbs then lose compression around the rings at the top? I do not have any explanation for this shit. We're taking it back apart and to a machine shop to check it out.

I'd check the following: - compression - all bearings and brakes - sprockets/chain - ball joints - look for oil leaks around gaskets/seals I can't think of anything else right now. These are the things that I've had problems with before on m '99.

This is not any of the motors in my sig. It has a milled head (0.020'') that gave another motor 150 psi, K&N clamp ons, Toomey T5s and +4 timing. As far as the compression test; the throttle was held open. In fact, we first tested it without the carbs even on it. The tester would have to be good. Immediately after we tested this motor for about the 5th time, I tested my Cub motor and got ~160 psi. I'm thinking now that it may be the ring gap, but as mentioned, why the hell does it start first kick? Keep the thoughts coming!! Thanks.

Ok. We got these pistons and cylinders installed. The used pistons were marked left and right. The compression is 60 psi in both cylinders, but compression feels fine at the kick starter and it starts on first kick. We put in huge main jets (410s) to be extra safe, and of course it runs like crap. I haven't rode it so I can't describe the running condition exactly. The pistons and cylinders both appeared to be in great condition. I e-mailed the seller and he said the topend was tight when he tore it down. Another reason to beware of e-bay. He told me that the rings had to be installed incorrectly or a gasket is leaking. I know the rings are installed right, hell you can't get the jugs on if they're not on correctly. We're gonna spray soapy water around the head and base gaskets and check for bubbles upon kick starting. We did re-use the gaskets (this is not my engine, I would not have done this), but the gaskets looked good. Note: The compression tester is accurate. We tested my Cub and got 160 psi.

Well I already "bought" some cylinders. I actually bought them for a friend thats gonna make payments to me, LOL. I was also looking for some cylinders for my '99, but I've decided to go all out and put my stock stroke Cub motor on the '99 and build a 421 Cub for my 2006 out of the stock '99 motor. I've got the parts ordered from Jeff @F.A.S.T. The '99 has a stock swingarm for right now, but It's got a wheelie bar. We just put the Cub motor on it last night.

Never mind. I'm a dumbass :shoothead: . The casting "chip" is just where the sleeve is exposed and it's on both cylinders. I thought I saw it on only one cylinder, therefore assuming it was a chip or flaw of some sort. However, I am open to suggestions on jetting for these with stock carbs (for now),K&N clamp-ons and +4 timing. I know it is highly variable with porting, but a safe place to start would be a help. Thanks.

You can't see it in the e-bay picture and I didn't realize that stock cylinders had that port. I haven't looked at a stock set in a while. Yeah that is the port I am referring to.

I don't have pics right now, but heres a link click here. They have an added intake port above the two stock ones. The casting is chipped on one cylinder port exposing the steel sleeve. About 2 mm is exposed probably. The chip is where the port enters the cylinder. What is the significance, if any of this slightly damaged port?

Oh I see. Yeah....I checked into those already. The seller said you could not run a stock stroke crank with them. Not sure I want to go +4mm right now.

The $500.00 cylinders are not the Passion cylinders. Those are the other one's mentioned in this thread. The reason I was looking into these, is because I don't want the down time. I just want to buy some good ported cylinders and bolt them on. I've already got a Cub motor, I'm just trying to slowly build another motor, just not all out with a Cub just yet. Also interested in a complete motor set up.

Are these worth $500.00? click here

The oil could be from the crankcase. A bad crankcase seal on the right side would do that. I don't know from experience just what I've read. As for the other guys problem, I'll refer you to another post. I'll edit it in when I find it. click on this

I'm pretty sure that the cables are different, but I could be wrong.

I've had both on the same motor,and I honestly could't tell much difference in power. Even with the airbox on, you can still get the filter wet if you hit a big puddle. I have an airbox on my '99 and pods on my '06.

You don't have to get "big bore kit" to beat a Honda 450.

Switch quads with him and see who wins. Also......rider, traction, shifting, etc are some of the biggest factors in drag racing, not just horsepower. My piped basically stock Banshee will kill my Cub Banshee for about 200 to 250 feet with holeshots. With 4-snows turned backwards (basically Pro Wedges), its a whole different story. The second Banshee in my sig has never been beat by a piped/cammed 4 stroke (as long as I don't miss a gear, get a bad start, etc.). No that there aren't some out there, though..............oh yeah I forgot I got beat on gravel by a 450R on alcohol, but other than that, 4-Strokes=no prob. :cool:

I've jetted a Banshee w/that setup with as high as 370s and it wouldn't foul a plug or load up. This was w/K&N with the airbox almost cut all the way off. All we had was 370s and 330s on hand, and we figured it was safer to go with the 370s, which is extremely rich, I know, but it runs pretty good. Never did a plug chop. This was just a couple weeks ago on a new 2006. Temp was in the 60s and elevation is 300ft. Stock pilot is ok with those pipes, but some recommend a 27.5, which will be fine too.

It should be the same metal and process and extending the Blaster. It must be cast steel, cus' it will rust!?? The Blaster and Banshee swingarms' design is identical, only the size is different.

I raced against what Jeff calls his "trail bike" this last weekend. I could beat him a couple times in 300 ft. It was easier to beat him in 400 ft, though. However, he may have barely beat me a few more times than I beat him. It was damn close. But when he sprayed the nitrous, it ran away from me. His wife was there on an 800 Outlander max running 70+ MPH on this track. It would run with a piped banshee from start to finish, though it did not beat my other Bansee. Unbelievable. This is a 4wd utility quad w/a pipe and programmer.

My friend's Ricky Stator 200w did the exact same thing. It was preassembled to the timing plate when he got it, so he couldn't have been at fault for the stator breaking loose from the plate. We tore apart the top end and were about to get in the to bottom when we discovered the problem. It acted like it was locked up. Ricky Stator sent out another w/out any problems.

Yes Very possible.