September 4th, 2017, 01:08 AM | #1 |
"a legend in my own mind"
Name: maverick9611
Location: Augusta,Georgia
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velocity stacks
when i had my zrx 1200 this was the trick thing to do. steel dragon can make them any size/length. they have built in screens too. i bought a set and never mounted them. just thought i would pass it on.
http://www.steeldragonperformance.com/products_2.html
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September 4th, 2017, 06:44 AM | #2 |
Guy Who Enjoys Riding
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They're beautiful, but not something I would put on an engine unless all it ever did was run 1/4 mile occasionally.
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September 4th, 2017, 09:50 AM | #3 |
Certifiable nontundrum
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Those are wicked
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September 4th, 2017, 04:38 PM | #4 |
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Not very practical on a small displacement engine.
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September 13th, 2017, 03:47 AM | #5 |
"a legend in my own mind"
Name: maverick9611
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they have screens built into them.
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"trying not to get old" Last futzed with by maverick9611; September 14th, 2017 at 02:34 AM. |
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September 13th, 2017, 03:48 AM | #6 |
"a legend in my own mind"
Name: maverick9611
Location: Augusta,Georgia
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i wonder what main jet you would have to use?
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September 13th, 2017, 07:09 AM | #7 |
Guy Who Enjoys Riding
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October 12th, 2017, 04:23 AM | #8 |
"a legend in my own mind"
Name: maverick9611
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ram air makes sock filters for them.
http://www.ramair-filters.co.uk/prod...rs-motorcycle/ their on ebay and amazon too. i might try the stacks, might calm the air down prior to entry into carb. i know cv carbs don't like turbulent air but everybody with pods disregarded the memo. i've contacted steel dragon for a price quote.
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October 12th, 2017, 06:39 AM | #9 |
Guy Who Enjoys Riding
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I know several guys who run pod filters with extension tubes between the filters and carbs, and report great results. They made them from PVC plumbing parts. Foam filters over the stacks should work well too.
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October 12th, 2017, 06:47 AM | #10 |
"a legend in my own mind"
Name: maverick9611
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good info to know. since the el cheapo exhaust system had built in O2 bung, I might spring for a wideband kit. my tuning skills are amateur at best. can't seem to find right set up with the pods.
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October 12th, 2017, 07:54 AM | #11 | |
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Quote:
Bill
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Insanity: doing the same thing over and over again expecting different results each time. |
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October 12th, 2017, 10:03 AM | #12 | |
"a legend in my own mind"
Name: maverick9611
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Quote:
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October 12th, 2017, 11:08 AM | #13 |
Guy Who Enjoys Riding
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Uni may sell something like that made for velocity stacks too, I'm not sure.
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October 12th, 2017, 11:32 AM | #14 |
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October 12th, 2017, 10:04 PM | #15 |
"a legend in my own mind"
Name: maverick9611
Location: Augusta,Georgia
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ram air are made specifically for stacks. they call em socks.
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October 13th, 2017, 07:37 AM | #16 |
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Name: Patrick
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You're barking up the wrong tree... All of this has been done before long ago, and isn't worth the cost or time on this bike. Kawasaki actually did a respectable job getting power out of this (ancient) engine.
Want a faster bike? Get a different bike. |
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October 13th, 2017, 08:44 AM | #17 |
"a legend in my own mind"
Name: maverick9611
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that’s ok, still going to do it. different strokes, different folks.
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October 13th, 2017, 01:27 PM | #18 |
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Name: Timm
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The screens in the stack do absolutely awful things for airflow and really defeat the purpose of having a velocity stack in the first place. The whole point of a good air filter is to increase the surface area to minimize the loss of flow as much as possible and restricting the filtered area to a small screened area is, well, if you're using them to look cool, go for it. If you think you'll get more power, forget it.
There is a reason modern racebikes have big airboxes. It's because the total volume of air in the box is relatively slow moving, and the slower the air, the higher the pressure and that means more efficient cylinder filling. Also, bikes with open velocity stacks are much more susceptible to carburetion problems due to turbulent air, crosswinds, etc. Velocity stacks may work well on a dyno indoors with no breeze, but when the bike is moving through the air at 80 mph you will get a different story when it comes to airflow and power. This is because there will be air turbulence that will change as the bike and rider move. An example of what turbulent airflow will do: I had an SV650 racebike with the filter installed in the airbox but no lid on the airbox (a common SV650 mod) I had also modified the bottom side of the gas tank to increase fuel capacity. Modifying the gas tank also meant that I had to raise the tank on its mounts. I started having issues with the bike stumbling while on the gas in some high speed corners. It was very puzzling until I realized that it was a windy day and the crosswind was playing havoc with the carburetion due to it blowing across the top of my airbox from the side and disturbing the aiflow into the box. So even with an airbox you can get caught out sometimes but with just velocity stacks its much more likely. I have a good sized K&N air filter with no airbox on my Ninja 250 racebike now and it does pretty good. The only reason I removed the airbox because it is a giant pain in the a** when working on the carbs. If I keep developing the bike for next year, I will make a better airbox out of carbon fiber and I would expect that it will perform better than with just the K&N. Now, put the right velocity stacks inside an airbox (without those awful screens) and then you may start getting somewhere. But even so, velocity stacks by nature will work better only at certain rpm ranges. That is why bikes like the Yamaha R6 have velocity stacks that move in and out which changes the effective length and makes better power over a wider rpm range. |
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October 13th, 2017, 01:32 PM | #19 | |
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Name: Bill
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Quote:
Bill
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Insanity: doing the same thing over and over again expecting different results each time. |
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October 13th, 2017, 01:37 PM | #20 |
"a legend in my own mind"
Name: maverick9611
Location: Augusta,Georgia
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i’m going to try with no inner screens and ram air socks. trying to get ahold of steeldragon.
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October 13th, 2017, 01:38 PM | #21 | |
Rev Limiter
Name: Jay
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Quote:
The air going over an open pod filter is turbulent in addition to moving the wrong direction - which is effectively creating a vacuum or at least working opposite the direction of intake flow. You may see more power on a dyno with pods/stacks/nothing at all, but it doesn't necessarily translate to the real world. |
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October 13th, 2017, 08:55 PM | #22 |
"a legend in my own mind"
Name: maverick9611
Location: Augusta,Georgia
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not if i go with a longer stack. might calm air down prior to entry. steeldragon did contact me and are waiting measurements from me. i'm doing this project as a hobby experiment.
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October 13th, 2017, 09:45 PM | #23 | |
ninjette.org certified postwhore
Name: Bill
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I wouldn't do this kind of stuff today but when I was younger it was fun. That's what this is all about - FUN. Have at it. You're making memories that you can tell your kids about to make them certain you are nuts. Photos please. Cheers, Bill
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October 14th, 2017, 03:35 AM | #24 |
"a legend in my own mind"
Name: maverick9611
Location: Augusta,Georgia
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i might flat slides on it
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October 14th, 2017, 03:37 AM | #25 | |
"a legend in my own mind"
Name: maverick9611
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Quote:
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October 14th, 2017, 06:26 AM | #26 |
Guy Who Enjoys Riding
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I still have mine. I know a guy selling his S3 if you want a 400 triple. Others are available.
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October 14th, 2017, 06:28 AM | #27 |
ninjette.org certified postwhore
Name: Bill
Location: Port Huron, Michigan
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Hey, I'll bet Triple Jim has some leads for you. The triples are a-lot of fun. Just don't expect it to handle real well. "Cycle" magazine used to refer to them as "flexible flyers". Get a 73' 500 it got the best ignition system.
Bill
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Insanity: doing the same thing over and over again expecting different results each time. |
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October 14th, 2017, 06:30 AM | #28 | |
ninjette.org certified postwhore
Name: Bill
Location: Port Huron, Michigan
Join Date: Mar 2017 Motorcycle(s): 2007 Kawasaki 250 Ninja, 1982 Honda Ascot FT500 Posts: A lot.
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Quote:
Bill
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Insanity: doing the same thing over and over again expecting different results each time. |
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October 14th, 2017, 06:33 AM | #29 |
ninjette.org certified postwhore
Name: Bill
Location: Port Huron, Michigan
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When I converted my Honda 500 single from Keihin to Mikuni I considered a flat side. Spending some time on the internet I learned that they are a be-aach to tune for low to mid range performance. Nice flat-out though.
Bill
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Insanity: doing the same thing over and over again expecting different results each time. |
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October 14th, 2017, 06:35 AM | #30 |
"a legend in my own mind"
Name: maverick9611
Location: Augusta,Georgia
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thanx for the offers, but my daughter just started university of georgia and my finances had to take a “readjustment “ 7 day meal plan is over 3k😢
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October 14th, 2017, 06:57 AM | #31 |
Guy Who Enjoys Riding
Name: Jim
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Don't hesitate to check into student aid from the state. Georgia has scholarships and grants available, but I don't know the specifics.
In the day, triples handled about like other bikes of the time, as proven by their record of stock class race wins. It doesn't take much tweaking to make them handle quite well. The 1973 H1D had essentially the same magneto CDI system that the H2 had, with one CDI unit for each cylinder. The KH400 had a similar system, but not identical. '74 and '75 H1s and later KH500s had magneto CDI, but used a single CDI unit and a distributor on the coil primaries. The early H1s had 12v powered CDI systems with an automotive type distributor. |
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October 14th, 2017, 06:58 AM | #32 |
"a legend in my own mind"
Name: maverick9611
Location: Augusta,Georgia
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👍🏻
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October 14th, 2017, 08:24 AM | #33 | |
ninjette.org certified postwhore
Name: Bill
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It took me 10 years to get my hands on one of these model kits. It's a very detailed kit with metal etched spokes on the wheels. This one came directly from Tokyo. Hey, a good thing to do this winter - I'm getting nostalgic. Bill
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October 14th, 2017, 09:16 AM | #34 |
Guy Who Enjoys Riding
Name: Jim
Location: North Carolina
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Chucking the original flexible clamshell caliper(s) and changing to a single later EX type 2-piston caliper with EBC HH pads will do wonders for braking. Going to longer rear shocks also makes a noticeable improvement in handling. Tight swing arm bushings and head bearings are important on the old triples as well as all other motorcycles! But don't run open velocity stacks on one.
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October 14th, 2017, 12:22 PM | #35 | |
ninjette.org certified postwhore
Name: Bill
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I wish you never mentioned that 400 triple. Bill
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October 14th, 2017, 12:44 PM | #36 |
Guy Who Enjoys Riding
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One of the biggest triples guys of all is in your state... Rick Brett in Traverse City. If you ever wanted a triple and didn't want to drive too far, you should talk to him. My friend's S3 is in decent shape and he'd probably let it go for something in the mid 2k range, I'd think.
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October 14th, 2017, 12:47 PM | #37 | |
"a legend in my own mind"
Name: maverick9611
Location: Augusta,Georgia
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October 14th, 2017, 12:52 PM | #38 | |
ninjette.org certified postwhore
Name: Bill
Location: Port Huron, Michigan
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Quote:
Bill
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Insanity: doing the same thing over and over again expecting different results each time. |
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October 14th, 2017, 07:41 PM | #39 |
ninjette.org certified postwhore
Name: AKA JacRyann
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Here's triple I want!
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October 14th, 2017, 08:20 PM | #40 |
Guy Who Enjoys Riding
Name: Jim
Location: North Carolina
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That's either a 250 or 350, and appears to be built for its look, rather than performance. Things like Emgo pod filters, tires chosen for their vintage appearance, and low-end expansion chambers give it away. I like the one I had the opportunity to do the exhaust system for a lot better. It's an S3 with a highly modified H1 engine and a lot of real performance mods. Admittedly the airbox wasn't back on yet, and I've probably posted it before, but:
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