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Posts posted by po18guy

  1. That is almost exactly my idea - but without a corrugated tube - which causes turbulence and restriction. Cooler, slightly denser air produces a bit more power and more cognitive comfort for those of us who over think things. I'm planning  to use the smooth silicone hose for car turbo applications. The wall thickness is sufficient that it should never collapse. Also, cutting the air box right where Phil did - at the largest diameter just ahead of the box itself. After that, they neck down quite a bit. Does the air box design trace back to carbs? I haven't searched it yet, but almost think so. 

  2. What flows best? Open velocity stacks without a screen. Emphasis on "velocity."  

    What produces the best power?

    Different question.

    What filters the best while producing the best power?

    Question #3

    The P08 power curve is indistinguishable from, say K&N. 1% is statistically identical. The filtration, if true, seems to be substantially better - but is that micron size of particle what we are most concerned about? And, does it do better on smaller particles? More questions than answers at this point.

    Aldous Huxley ended Brave New World with the sentence: "You pays your money and you takes your choice."  

  3. 5 minutes ago, swooshdave said:


    Yeah, those are my drone shots.

    If you watch enough of Mike’s channel you’ll see me more often than not. :ph34r:

    There’s a whole series (playlist) on my Norton engine rebuild.

    He has a video coming out in a couple weeks that we shot today. Very fascinating no matter what bike you ride!

    Saw the Norton barrels and head on the bench during the Rapide build. Knew there had to be more to it. You've undoubtedly got better riding weather there in Orygun than we have up north. I think my cousin in Seward has better riding weather than Seattle.   

  4. Have been watching the progress of a bloke in Oregon refurbing a Vincent Rapide. Cueing up the "first start" video, I note in the opening shot that the man (or his friends) has excellent taste. In fact, it might leave you greenie with envy...

    Is it one of us???



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  5. If you want the look, buy one pod filter, cut it in half lengthwise, and hot-glue half to each of the intake boots just upstream of the throttle bodies. Only you will be the wiser.

    Seriously, airboxes are big talk even at the EX500/GPz500S forum. That bike uses CV carburetors which need a certain restriction to function properly. All the cool dudes toss the box and put $10 pods on, only to lose tons of mid-range (if 498cc can be said to have that), as well as some top end, as the slides may not rise completely. The EX airbox has a 7 litre capacity and is a very odd shape, fitted into each and every available nook and cranny in the frame. 5 separate pieces and two snorkels. It was most certainly not done for looks - it was done by reading dyno charts at the factory.

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  6. 14 minutes ago, western trucker said:

    How long do the leads have to be has anyone measured this as I was looking through repco’s website and they have a 90 cm lead with 90 deg end

    The NGK wires pictured on page 1 of this thread are more than long enough. Less than $20, a relative steal as Guzzistuff goes. This listing is $16.78, but make sure you specify the 90º cap.


  7. On 1/5/2020 at 10:15 PM, Lucky Phil said:

    No those stats are always without the rider. Too many variations in riders. If you are too far outside the box these days with regard to your physique then you can pretty much forget getting a proper cutting edge sports bike to handle to its full potential. The bike and suspension and the tires are all designed these days for a rider between 5'4" and 5'8" 125 to 145 lbs.

    As you move outside that box your ability to be competitive diminishes exponentially. You may think that that's only for road racers but if your 6'2" and 190 lbs nothing on a a modern hyper sports bike is designed for that kind of creature. Not suspension, ergonomics or tires. Doesnt mean its unridable on the road but your on a hiding to nothing getting it set up to be really good. Modern sports bikes are designed around modern racers,ie Jockey sized people.


    True! My lowly, ancient EX500A1 (1987) has a 56.5 inch wheelbase and bars that rise about 4" above the triples. I am that 6-02/190 "mythical" rider and that bike just plain fits me. Few bikes that I have thrown a leg over have given me that impression. Of memory, the Victory V92SC, the Buell XB12 - for two polar opposites, and as I recently discovered, the Ballabio. Many bikes, especially at shows, have "the look" but not "the feel". Since I actually ride the bikes, I prefer them to have both, but the feel is paramount. The V11 sound, "filtered" through the Staintune cans, is simply icing on the cake.  It is a manly bike, if one is allowed that term these days, and requires some muscle, skill and involvement on the rider's part. No droning commuter bikes need apply. 


  8. 34 minutes ago, malengi said:

    As someone living in Japan for the last 20 years i can tell you it is not that difficult to pass a registration inspection for an old V11. A little pricey, but no worse than my old home, Australia.

    What you may find is that Japan is not the rich country it once was. Wages are quite low as is the cost of most V11's. The reason for people getting rid of these bikes is the crazy repair , service and spare part costs for any vehicle. Hence I do my own repairs and buy parts from overseas. Due to lack of space and unwillingness to try what they are not fully trained for, almost no Japanese works on their own vehicles. The bikes are cheaper here on the whole than other countries.

    Why that bike has such a high price tag is beyond me.

    Too many political, financial, manufacturing (airbag) and other scandals, I guess. As well, the Koreans are putting a big dent in their auto sales, at least stateside.

  9. I picked up the idea from magazine content such as Cycle World, Cycle, Car and Driver, etc. in the 80s and onward.  From the interwebz:

    "Three years after purchase, every new car has to go through an expensive inspection process, and once every two years after that. Furthermore, vehicles older than 10 years have to pass the inspection every year. As a result, most car owners in Japan write off their cars after 10 years and buy new ones.Jun 14, 1998"

    Collector motorcycles? Nothing that I could find after searching several ways.

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  10. Work is progressing very nicely! I see the snorkels cut right about where I plan on trimming mine back to. From there forward, I'd "like" to run red silicone car turbo hose to just above the oil cooler, with screened openings. Ah, dreams...anyway, we've seen the fabricated sheet metal (alloy) valve covers for Yank and Aussie V8s. Would be really nice, really pretty (really $$$) if a shop could fab a polished, tig-welded alloy airbox, larger intake openings being part of the package. 

    Speed of thought advancing to "tepid" here, the airbox lid is a simple shape. A sheet of .250"/6mm ABS, some cutting and some gluing might just provide a reasonable alternative. And, I can make the intakes the size I want - space between tank and frame as the runners go forward being the limiter. 3.00 inch/76mm silicone tubing could be compressed to oval shape between tank and frame I suppose.

    What I really need: 1) more energy or 2) a younger workmate to carry out the work, and/or 3) warmer weather. With patience, I'll get #3. 

    • Haha 1

  11. Oddly (maybe not), my airbox lid has no recycling symbol on it. Perhaps even more strange is that it carries the 'e11' mark, which seems to be the UK certification of motor vehicle safety and environmental acceptability, issued to the UK by the EU authorities. The part itself appears to be 'blow molded', in that the outer dimensions are controlled and texturized by the mold, while the material thickness fluctuates somewhat and interior dimensions are smooth and less consistent. Such a manufacturing process tends to favor a thermoplastic - but in recent decades, many new and hybrid types of plastic have entered the market. So, back to the start: who knows? Acerbis may not even remember...

    As well, the box itself may consist of an entirely different material, formed differently. :shrug:

  12. 1 hour ago, Lucky Phil said:

    No identification of any sort. I have now found it can be well bonded by using a Polyethylene welding rod as a hot melt glue. Gives a strong bond. The airbox material itself doesnt melt but the rod bonds it well. 


    If it is made of the same stuff as the lid, I have a spare which I can check and advise of the type of plastic it is. From the pic which Paul Minnaert posted above, it appears that it might be glass-filled nylon, which can be bonded with liquid epoxy, JB Weld (steel-reinforced epoxy) or similar. If it did not melt and ball up on the hole saw, it is probably a thermo-setting plastic.

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  13. Hmmm. Some late-night musing here, as the snow falls. It's either a thermoplastic (weldable) or a thermo-setting plastic (bondable). Have you had it off recently to see the recycling mark molded into it? Or, do you have the bits trimmed off? It either melts to the soldering iron or you can epoxy a like plastic to it. If a local plastics supply has a sheet of similar stuff, you could make up a ring which would be concentric with the intake boot,covering the gap and appearing somewhat "factory."

  14. There is nothing like a good fixture, wood, metal, what-have-you, that will hold the work piece! No drill chattering, no dancing as  Phil stated. All of the force used is put into fitting the guide, not moving the head whilst placing the guide. A lot of lost motion and wasted effort. I mean, how difficult is it to run 4 carriage bolts up through a scrap of plywood to hold the head still?

  15. I marvel at the technical and practical research that this seemingly unknown organization is capable of. It labors in obscure parallel with the Piaggio Group, a multi-billion € manufacturing giant of a corporation. Yet, from this position of obscurity, it is capable of identifying design and manufacturing faults, engineering superior replacement parts, arranging for their manufacture and worldwide distribution, in a timely manner and at a cost which the average consumer can afford. Unsung heroes they are! Where is this covert operation located? Right here! Pete, Chuck, Phil, Scud, footgoose and many others who devote irreplaceable life energy to polishing up and perfecting what the colossal Piaggio group could not (or would not) do. What caused this effusive praise? Admittedly, some dark roast coffee and the fact that my re-engineered shift mechanism springs arrived today. Kudos, gents! A multi-national David who has slayed the capabilities of Goliath. Or perhaps beaned him in the melon whilst his attention was focused on "greater things."


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