WINDYCITYJOHN400

GAME - SET - MATCH!

Well, your question is on 3 pipes I would NEVER buy.......so good luck with your research.

Your somewhere shy of 70 at best if tuned perfect. No chance your even hitting 70. (No way of knowing what "Fully ported " means for your motor) Nobody ever says they are 1/2 ported. A motor can be fully ported and still have stock port timings. Either way I'm giving you the benefit of the doubt and estimating it as fully ported. More than likely if you have done all your own tuning, the bike is actually only hitting 60-65HP.

And even with all the time he commits to on the phone with people.....he still delivers on time, on schedule, meets the customers needs and never makes you feel rushed. Not to mention his stuff performs and he knows what he's doing. All that work and he still makes time to test motors and even find new designs. Being at the top of your industry is never an easy job or for the faint of heart. Top notch guy. (And He answers my calls most of the time, when he doesn't I assume he's running a machine and focused on a customers important work.)

Eating rings FTW! OK, that should be an easy fix.

LMAO And he finishes with a pic of him ripping a 4-stroke.

"Hammering" sounds like a good description of how they would feel in the whoops. LOL

They just expanded the riding hours on the dunes from May thru September to 10:00 PM. You need full headlights and tail lights to do it. Usually they had late hours on Labor day weekend and it was always fun. Now we get those hours most of the summer. SWEET!

Or they can just lay off the cheeseburgers. Then they can run shocks that soak up the hits instead of running stuff that want's to eject everything not bolted to the machine. What does that weight saving really do for you performance wise? Unless your a jockey under 160 pounds....what difference does it really make? "Pretty good over the whoops" shouldn't mean "I lifted and hung on for dear life and managed to survive" It should mean " I pinned it and carried the front end thru the whoops." My ELKA Dune Editions can handle me running 5th gear pinned right along side the V-8 sand rails through the rough stuff. If anyone wants to tell me they do that with a Marvin/Shaw combo....I'm going to call bullshit.

This is Steven's official home version of a "Feeler Gauge".

WARNING: All the force your pistons saw during your dance with detonation was also shared with your crank and rod bearings. Proceed with caution. No your local Yamaha dealer can't check shit and I would never let one build or even re-build a motor for me. We have site sponsors here. Get to know one. It'll save you hundreds in the long run. I'm a big fan of Cameron at REDLINE RACING. He knows his stuff, has his own dyno and isn't afraid to post the results of his work. Great guy....give him a call and just chat.

Welcome to the site. Plenty get elbow deep into the project your doing, then figure out it wasn't the cheap upgrade they thought it would be. It's been covered many times on this site. Feel free to do a search. As stated above....Get out now! Take it all off and get it listed on Ebay for someone with a 450 or another person who has heard about the Banshee conversion. You would be better off with stock reverse offset wheels, factory A-arms and some basic Works shocks.

Yep. See Above folks ^^^^ Lesson learned. when a plug backs out......you don't put it back till you make some changes that will prevent it from happening again. Nope, Sadly all that was caused by you just tightening the plugs back up and lining up for another race. Well tuned motors don't blow. Motors with symptoms that indicate trouble don't blow if you park them. But if you whip a horse till it dies.....then you have a dead horse. (Sorry to hear about your horse.) You never stated the hours on that motor. If you have a ring going down, or your rolling to the line with a cold motor, you can cold seize the motor and get parts hot enough to work like a glow plug and the motor will fire off too early causing detonation. Kicking compression isn't as accurate as calculated. Octane rules of thumb aren't promises. Plus pump gas can be VERY unstable. If you didn't get the gas the same day.....it gets really risky with performance motors. I've seen pump gas go bad in just 6 days. A guy in our group had a 57 HP bike and ran it on premium pump gas. Next weekend we go to ride and he needs push starts every time the bike dies. He thought his brand new build had ate the rings......Nope. Premium pump gas went to shit. (In this economy who knows how long that premium is sitting in the tanks in the ground? I'm sure many of the hot cars are sitting dormant.) So it could have been enough Octane originally.....but maybe it went bad. Who knows? So what are you building next? Big drag cub or Raptor 700?

Oh it's all good dude. See lots of people want to be helpful. It's just some of them don't know they aren't smart enough to even put on a pair of socks correctly. Others are helpful and provide information that's useful. Then you have others who read the blathering of the mentally challenged and point out the flaws. (It's all just a form of natural selection really.) Then you get to sift through all the postings and interpret who's info your going to choose to accept. (More natural selection.) If you wait long enough the real truths will become clear.......or we'll get way off topic and end up arguing about something that had nothing to do with the original posters question. By the way, welcome to the site. Feel free to jump right in. Don't start throwing elbows right away, but don't take any shit off anyone either.

A- Running carbs that small on that motor is just not a good combo. B- What pipes are you running. Maybe they are backing heat into the motor. C- Your cooling system is fine....your jetting is more than likely the issue. Quit wasting money on weekends and trips and spending all your time trying to jet something that is just begging to be re-done once you get new carbs. Just get the right carbs, THEN go tune and play.

With your compression and squish, I wouldn't feed that motor pump fuel.

Wait...before you said it like the sparks were coming from the stator. But now I understand your saying the sparks are coming out your left tailpipe. Is that correct? If so...pull your head because your motor is eating rings.

4's have better throttle response and look better thru the curve. 2's on high powered bikes (stuff that makes 80+ HP will make about 2 more HP on the very top end. 4's have no screws that can come loose. If you have a dedicated track drag bike on Alky with OOF pipes, an override and your looking for every last ounce of power for that drag machine, then I'd say run the 2's. For everything else I'd say run the 4's. My bike makes over 100HP on race gas and after doing all that testing, I kept the 4's in my machine.

........so.......you were.... STOUNGE.... by a bee?

You ever built a crank before?

Add fuel, Switch to race gas, get some measurements of your clearances on your domes........Much more to come, but it's a starting point. Remember.........they all run like a raped ape just before they ventilate the pistons. If your backing plugs....STOP RIDING TILL YOU FIGURE IT OUT!

Funny story. Video or it didn't happen. LOL

I prefer to stick with the factory CDI. I had a DYNA FS and after a while it started to break-up on the top end. After doing some research, it appeared to be well known for doing that. I'm not saying it was common (like Ricky Stators failing) but more than a few had the same issues.

With the mods you have your pretty far from needing new carbs. you will see no performance improvement doing carbs. But I hate having to jet a bike with stock carbs. It's a pain in the ass. So if you want to get some flat slide 28's to make working on the carbs easier, then go for it. But carbs are pretty far down on your list of needs.

Well with those Vito's pistons it simulates porting. Regardless of the compression or timing the bike would have needed much larger jets to prevent a burndown. You DID NOT need race gas for that motor. You DID NEED to have more tuning and understanding about your motor than your average 16 year old kid. Welcome back to the Banshee world....let the learning curve begin.