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From MikesXS https://www.mikesxs.net/ultimate-flow-optimizer-ufo-mikuni-vm36-vm38.html From the manufacturer https://thunderproducts.com/product/ufo-ultimate-flow-optimizer/ Thunder Products has a long history as a maker of addustable jetting, jetting while riding, and power valves, none of...

I don't post many pictures but here goes. I've always thought the tail end of my '83 Heritage Special was butt ugly and I've got an affinity for hinged fenders like on old Harleys, Indians, and probably a dozen different Brit bikes so I sawed 2 fenders, added the henge, made an epoxy taillight...

I'm looking for a 64 spoke front hub as someone stole mine.

Allow me to begin by stating I am a retired truck driver with over 3 million miles of accident-free experience across the USA, Canada, and Mexican border towns. I know how to pull trailers. The item in the photo is a quick disconnect for motorcycle brake lines. I currently own a tandem axle...

For Starters: I am NOT talking about replacing the existing oil pump on my XS with an electric oil pump. Well, not yet... I recently got my hands on a new power steering cooler that is adequate to use as an oil cooler. Secondly, I'm considering a much deeper oil sump. Now what if, instead of...

I found it interesting that the world record for a 50cc motorcycle is 144.921 MPH set by J. Buddenbaum in 2008 on a Streamliner- Modified Fuel (S-AF) Buddenbaum Motorcycle of his own making while the world record for 3,000 cc, was set by M. Sturtz on a Special Construction Partial Streamlining-...

I've long pondered ways to improve our beloved XS650 but sadly don't have the tools necessary to do these things myself. Thus the reason I post my ideas here. Timing chains have almost completely disappeared from modern automobiles but still remain common on motorcycles. But could that be about...

Food For Thought While this could be done with an XS engine I think the easiest way to build such an engine might be to use 2 rear heads on an old Ironhead Sportster engine with the front being the air pump and the rear being the power cylinder. An even better choice might be one of the old...

Anyone in or near Greensboro riding or turning wrenches on XS650s? I'm the only person I know in a city of 280,000 people who rides one.

It seems the boat and snowmobile guys have known about these things for years. Even S&S offers a version for the Harley riders running S&S carbs. And perhaps I'm the last person in the world to learn about the Thunder Power Jet which according to the manufacturer, not only provides additional...

I need a 17 tooth front sprocket for an XS650 520 conversion. I'll take a 16 if there is such a thing. Let me know what you've got. Thanks!

Found this youtube video I thought I would share. I was thinking that if one were to add a secondary source for adding gasoline to the mix (a boost jet, so to speak) that was only used during the brief periods when the blower is running it just might have potential. <iframe width="560"...

My '83 XS has been down a while and it seemed to gain more problems while it was down than it had when it was running. Anyway, among other things I've been beating my brains out with the front brakes only to discover the rotor diameter was too big for the dual disc calipers I added. So I found...

A while back I got my hands on a Honda CB 450 K2 like the one in the photograph at this link: http://www.livablelandscape.org/CYCLES/450K2.htm Actually I got 2 of them. The bikes I've got is pretty sad but amazingly one of the complete front ends doesn't need anything a little paint and...

Hey guys, I went to a family reunion high in the mountains of North Carolina where I spoke to my cousin, ET Weaver, who has been the owner of Yamaha of Jefferson since the doors opened in about 1970. We see each other about once a year and usually end up talking motorcycles since he owns a...

I noticed above my photograph it says I'm an XS Guru. I don't know how that came to be. I tried to change it a couple of times but obviously I'm not a computer guru 'cause it didn't take. I think I do okay at turning wrenches but I've only worked on XSs for a couple of years now and don't think...

Here's some sweet looking adjustable handlebars. They're actually made for replica board trackers but I thought they might provide some inspiration. Here's the website I snagged the photo from http://www.sportsmanflyer.com/ They just set a record at Bonneville...

I never imagined using StolenMotorcycle.net in this way but the latest victim to report a stolen motorcycle to us has actual names and more on suspects and needs help in tracking them down: http://stolenmotorcycle.blogspot.com/2012/08/yamaha-vinjyar04e1ya007275.html No heroes now, these guys...

Somebody restored a motorcycle and had to give it back to the rightful owner 37 years after it was stolen: http://www.spokesman.com/stories/2012/aug/03/stolen-motorcycle-returned-after-37-years/ Use your heads people. I'm sorry my partners and I couldn't have invented...

That the specs for a new Norwegian made electric motorcycle called the Roskva. http://cleantechnica.com/2012/08/04/carbon-fibered-electric-motorcycle-to-be-tesla-of-electric-motorcycles/ Personally, I don't think I could ride it. :yikes: